The constant torque motor on the A951E provides an ef ficient, steady flow of air for more even temperatures. This is why the same size drive may have a lower HP rating for Constant Torque applications. 14 seer 80% or 95+% afue combo. This alleviates the "cold air blow" often associated with single speed furnaces, and dramatically reduces system noise. If I buy a furnace that is labeled as having an ECM (according to the AHRI certificate), is it necessarily a variable speed motor? My understanding is no. Constant torque loads cause motors to draw relatively high current at low speeds when compared to variable torque applications. Additionally, the AC Inverter/Vector Motors can be ran across the line for bypass operation and can deliver a 1000:1 Speed Range in a standard TENV. Many VFDs also can be wired with sensors that provide PID speed control to maintain constant pressure in a blower system; this is very common when variable orifices in pipework are present, e. Aluminized steel in shot burners for smooth ignition. Torque Formula For Motor. Marsh Heating and […]. It may be a 2:1 compared to a 20:1 turndown ratio, which can severely limit the operational speed range for a constant torque load. purpose motor is either one quarter or one half of its rated speed, as shown in the motor Performance Data tables. At reduced speeds, winding life increases in variable torque load applications for all motor types. Highly Consistent Performance. This curve is called the torque-speed characteristic curve. Most high-end furnace models have a variable speed motor. Power supply is an important consideration in the application of DC motors. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). 59TP6B060V17--14 59 = Family T = Two Stage Gas Valve P = Performance Series 6 = +96% AFUE A = Major Series 060 = 60000 BTU Heating Capacity E; = Energy Efficient MotorV = Variable Speed Constant Torque ECMd inducer motor and two−stage gas valve; SmartEvap TM dehumidification prevents condensate buildup on the coil 1; ComfortFan TM allows homeowner to select continuous fan speed 1. Lennox Residential Channel 80,657 views. 95 AFUE Heating and cooling can account for about half of a home's total utility bill. Since 1985, furnace manufacturers have used higher efficiency, variable-speed BPM fan motors (also known as electronically commutated motors or ECMs) in some high-end residential furnaces. Speed Control; Pole. 5 Natural neurons (artist’s conception) 12 2. 20-Year heat exchanger warranty. of Max Torque. This will result in increase the speed of the motor. frequency will change the motor speed. The primary advantage of the DC motor is that it can develop constant torque over a wide speed application. There are 2 types used in HVAC, the constant torque, which has preset "speeds" that vary as the duct conditions vary, and variable speed where you tell the motor the speed you want and it varies its torque to give you close to the airflow you've asked for, even as duct conditions change, like a filter plugging up or vents being shut. • Under standard residential operating conditions, a variable speed ECM is typically 40 per cent more efficient than a PSC motor. Below are the top 10 Lennox furnace models. Search in GE Motors catalogs and technical brochures on DirectIndustry and find the information you need in 1 click. So, torque is directly proportional to the armature current. Gas Furnaces. The standard motor and the geared variable speed coupling form a strong pairing. 96% residential gas furnace (all models and BTUs). For example, with a standard squirrel cage motor wound for 230 Volts at 60 Hertz, the. Torque Speed full-step mode 1/8-full-step mode flux is rotated 90 and 45 electrical degrees, respectively every step of the motor. These will typically operate at an AFUE up to 96%. AC motors are well known for constant speeds and DC motors are popular for variable speeds. As the load on the motor is increased, the motor torque and. We offer many furnaces with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. It may be a 2:1 compared to a 20:1 turndown ratio, which can severely limit the operational speed range for a constant torque load. Evergreen EM X-13 Direct Replacement MotorsNo programming required Designed to replace ALL X13 Style Constant torque ECM Motors. These are drives that see near constant loading throughout the speed range, but might see overloads on occasion. His motor, when connected to three-phase AC power (as in every home in America, thank you Mr. The GE ECM variable speed is actually built as two separate components. Marsh Heating and …. Specifically, Model S8B1B060M3 versus Model TUD2B060A9V3. DEVELOPMENT OF THE CONSTANT-TORQUE ECM In 2006, the constant-torque multi-tap OEM indoor. Increase in load torque = decrease in speed If you have any questions about this relationship, or how the theory applies to a ‘real-world’ motor, please contact our sales engineers to help with your application. It features both a variable speed draft inducer and our patented Vortica™ II variable speed blower motor, to bring you and your home comfort and efficient performance. ) ECM - The Electrically Commutated Motor is becoming more common, and is definitely more efficient because of the way it runs. the furnace. Rating 2 can be three times the torque of rating 1 but either only in S3/15% cdf or in S1 continuous duty with forced cooling fan only. These types of loads are where much of the motor efficiency discussion begins with inverter duty ac motors using variable speed drives (VSDs). British scientist Michael Faraday first experimented with the idea of the electromagnetic induction motor in the early 1800's. Due to the motors' unique capabilities, specifying the application's range of speed can often point you in the right direction when considering an inverter-duty motor vs standard motor. High-efficiency constant torque ECM (Electronically Commutated Motor) blower motor. base speed (60 Hertz at line Volts); otherwise, the proper Volts-per-Hertz ratio will not be maintained for a constant torque load. VARIABLE VS. For example, for 1800 rpm synchronous speed, an induction motor might have a full-load speed of 1748 rpm. We offer many furnaces with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. This is why the same size drive may have a lower HP rating for Constant Torque applications. If your budget won’t allow the cost of a variable speed blower this is a good choice. When operating a 20 HP motor on a variable torque load, the assumption is that the load will require an average speed and torque that are less than 100% of maximum. So, torque is directly proportional to the armature current. Depending on the specific model of motor and the VFD control methodology, the manufacturer allowed turndown ratio may be dramatically worse with constant torque loads. The speed of the three phase induction motor at low speed is not economical. You can pair it with a high-efficiency heat pump or air conditioner and gain a cooling efficiency boost from its variable speed blower. The blower in a gas furnace operates all year long to circulate hot air or cold air throughout your home. The Goodman Brand GMVC96 High-Efficiency Gas Furnace with two-stage gas valve and a variable-speed circulating blower provides efficient and economical performance. The formula to get to torque goes like this, Torque = Power/Speed. Prior to the advent of the adjustable-speed drive (ASD), the polyphase induction motor operated as a constant-speed motor. 61 TENV motors have a constant torque speed range from 0 to base speed 62 TENV motors have provisions for tachometer mounting as standard 65 Will fi t standard effi cient F model numbers ONLY 71 Nominal effi ciency is base at the 1800 RPM (High RPM) and low speed effi ciency is available just not published. Brushed and brushless DC systems provide flat torque over a wide speed range while AC motors often lose torque as speed increases. The VFD at any full speed between zero and rated speed can produce 100%, 125% or even 200% rated torque with 100%, 125% and 200% rated current respectively. Residential Furnace Variable Speed Vs. Motors often require large amounts of energy when quickly accelerating to full speed. Due to the motors’ unique capabilities, specifying the application’s range of speed can often point you in the right direction when considering an inverter-duty motor vs standard motor. Variable speed, constant CFM, constant torque, brushless DC ECM motor Unit is in good working condition, a bit dusty from sitting in the garage for some years. Where process conditions demand adjustment of flow from a pump or fan, varying the speed of the drive may save energy compared with other techniques for flow. Single-Stage Performance with Constant Torque Motors. 20-Year heat exchanger warranty. Full torque at variable speeds is what you’ll get for your money. Therefore, the speed regulation at rated frequency is called constant torque speed regulation (T=Te, P<=Pe). In terms of torque — the force behind rotational speed — variable speed drives fall into two types of load categories:. The EL180NE's Power Saver™ motor operates at constant torque to maintain a consistent flow of air. Whether your project requires a DC motor, a stepper motor, or a steering gear, it can be found in this kit. Single-Speed vs. The control module (motor control) is attached to the back of the motor module (motor). Conveyors are inherently constant torque machines. This furnace is not eligible for the Clean Air Furnace Rebate Program: www. This alleviates the "cold air blow" often associated with single speed furnaces, and dramatically reduces system noise. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its development at the time it was approved. This n ew technology has an ECM motor with a speed controller. Advancements in technology enable manufacturers to create furnaces that are both energy-efficient and safe. Variable Speed blowers will adjust their speed during operation. Depending on the size (HP) and type, a standard, totally enclosed fan-cooled motor is proficient for a 4:1 up to a 10:1 constant torque speed range. Constant Torque Motor Like a variable speed furnace, constant torque furnaces provide lower operating costs and increases to overall system efficiency. You can rest assured you won't find this level of quality construction, dependability and efficiency at the same price point. It lets you experience an even higher level of comfort with. VERSATILITY. I'm replacing my furnace (and installing an AC), and I'm choosing between a Trane S8B1 and XV80. A common example of this is programming a soft start and constant torque, or current limiting. Additionally, these furnaces boost cooling efficiency up to 1 or more SEER (Seasonal Energy Efficiency Rating) points for additional summer savings. ECM's are DC motors that function using a built-in inverter and a magnet rotor, and as a result are able to achieve greater efficiency than most AC motors. The Grundfos advanced, variable-speed, "smart" pumps for hydronic heating systems can reduce pumping energy use by 80%. Pumping with variable speed pumps can result in better process control, energy savings, smoother operation and reduced maintenance costs for the pump station, when applied correctly. We have all seen the data on a motor nameplate – power, current, speed in rpm and all of the rest. Efficiency ratings Consider the AFUE (Annual Fuel Utilization Efficiency). Variable Speed Furnace. • Motor starts softly, ramps to proper speed. Motor Control Basics: Drive Operating Modes. The good news: your conventional forced-air furnace comes with two speeds. HP or torque will change depending on the change in frequency when the speed of an AC motor is controlled by a VFD. Loads of these types are essentially friction loads such as traction drives & conveyors. Its counterpart, fixed speed or “idling compressor”, or “load/unload compressor, is either on full throttle or off. Because it's variable speed, you gain greater comfort through more consistent temperatures with the added benefit of smarter energy use. Constant-torque loads require a constant motor torque throughout the operational speed range. Your better two-stage gas furnaces will come with either an electrically efficient multi-speed blower motor, commonly referred to as a constant torque or ECM motor, or a variable speed ECM motor that will help you reduce the electrical energy needed to operate this type of furnace. Photo: Grundfos USA. Longer, low-stage run times give you better energy efficiency, better temperature control and increased comfort. IPMSM is operated in constant torque region with MTPA, so all currents (id, iq) contribute to torque generation in this region and torque is also constant if the motor current is. Learn more about the 820SA Multi-speed 80% Efficiency Gas Furnace from Bryant. All help you need! black and decker dewalt dw328k heavy duty variable speed deep cut portable band saw w kit! All in one place! helpwire. A tensioner pulley is implemented in the belt transmission to take up or release the slack in the belt as the speed is altered. Both X13 and variable speed motors are DC (or alternating DC if you prefer), 3 phase, permanent magnet rotor motors that use back EMF to determine motor torque and adjust to load conditions. 9 Two Stage Constant CFM or ECM 7 11. 75 Constant Torque (ECM) Upflow 96% A951X060BU4SAB 60,000 3-4 34 x 17. With a variable torque application the torque actually varies with the speed so for example a fan or a pump. These are drives that see near constant loading throughout the speed range, but might see overloads on occasion. the furnace. BL Brushless Motor delivers 1,500 in. M2 is the motor, it controls the speed of the generator. Discuss constant HP and constant torque. GE ECM by Regal-Beloit introduced the Constant Torque motor (model…. Unfortunately, I have found in conversation with customers, there. The motor will draw as much current as it needs to get the torque necessary to rev up to the speed demanded by the voltage. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). An ECM motor is some times referred to an a variable speed motor. In this equation, T is torque, Kt is the torque constant, and I is current. The start-up torque, although not marked, is the torque value at the far left of the plot (at zero speed). This is why the same size drive may have a lower HP rating for Constant Torque applications. 0% AHRI Type Motor Type Number of Data Points % HSPF Change Range (%) Average % HSPF Change HP Single Stage PSC 1 17. 8 Constant Torque or X13 16 10. BL Brushless Motor delivers 1,500 in. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its development at the time it was approved. A variable speed furnace blower motor is a step above a multi-speed blower. 70%) of the rated current. Photo: Grundfos USA. The Power Saver™ constant torque motor in the EL195E adjusts airspeed based on demand. Constant Torque With industrial machinery, there are parts that require constant spinning and others that are best spun on a variable basis. Throughout operation, the furnace monitors incoming data from your HVAC system to automatically make blower motor speed adjustments. Multi-speed high efficiency (constant torque) blower motor. What is Special about the Constant Torque motor? Developed by Regal Beloit in 2006 under the designation "X-13", the Constant Torque motor is a high efficiency, brushless DC motor. With a variable torque application the torque actually varies with the speed so for example a fan or a pump. ECM motors are only efficient to operate at low torque, this means low speed and static pressure. Standardized widths for easy coil fit. T M – engine torque at maximum engine speed. Self-diagnostics saves last 10 fault codes regardless of power interruption. PHYSICAL CONCEPTS Constant Linespeed Tension or Force = torque radius Roll Circumference = 2π×radius RPM x Circumference = Surface Speed Winders Revised 5/9/00 10:32 AM Page 7. That’s exactly what the EL296V, with its high-efficiency variable speed motor, is designed to do. 0 amp CW rotation Variable speed 3 phase Ball bearing Cross Reference: 7092-0238, 7092-0238S, D342097P01, X38010571010, 7092. The main reason I'm even considering the XV80 is because of the variable-speed fan motor. From 3 ton Acadia heat pump system that was replaced by a new gas furnace, and was professionally de-installed. Compared to standard PSC motors, constant torque delivers more consistent airflow and quieter operation. Servo motor manufacturers normally provide speed-torque curves for each series of motors, which illustrate several interesting points of the servo motor's characteristics. For example, with a standard squirrel cage motor wound for 230 Volts at 60 Hertz, the. A 200 V, 10. All help you need! black and decker dewalt dw328k heavy duty variable speed deep cut portable band saw w kit! All in one place! helpwire. Switch on the variable frequency drive. Gas Furnaces. The torque and speed characteristics are similar to that of the characteristics of. That means there's more air going through the filter and therefore, more contaminants (bacteria, viruses, and mold spores) are being removed. How it works and why it's a benefit. 0% AHRI Type Motor Type Number of Data Points % HSPF Change Range (%) Average % HSPF Change HP Single Stage PSC 1 17. Stepper Motor Two-Phase, Two-Winding This component contains a model of a two-phase stepper motor with two windings per phase. At full load the ECM motor is 20% more efficient than a. Variable-speed, constant torque ECM blower motor for extra SEER boost with select cooling equipment; Supports single- and two-stage cooling units; Dehumidification feature in cooling; All sizes can be installed in California air quality management districts with a 40 ng/J NOx emissions limit. If the speed of this motor is reduced to 450 rpm by inserting a resistance in the armature. The motor would be able to produce rated torque at both 50/60 Hz frequencies only apply if the V/Hz ratio is constant, meaning that. Top Features of the BCE3E. If it is assumed that the current in the excited winding remains constant, the production of static torque of a variable-reluctance motor around a detent position is given by (33. A variable torque application is one which is usually easy to start and requires more torque as the ac motor speed increased. • To maximize power output, want constant optimal tip speed ratio. When doing so, however, the equality of both sides of the equation must be maintained. Heat is delivered in stages to help prevent drafts. The control module (motor control) is attached to the back of the motor module (motor). A single-speed blower motor costs around $450 to replace while a variable-speed motor costs $600+. GE - ECM Motor Technology and Troubleshooting Presented by The RLCS Engineering Product Field Support. AC drive applications can generally be divided into constant torque or variable torque. Gas Furnaces; Coils; Heat Pumps; Air Handlers; Gas/Electric Package Units; Heat Pump Package Units; Mini-Splits; Evaporative Coolers; Wall Furnaces; Mobile Home Furnaces; VRF; PTACs & PTHPs; Portable Room AC Units; Wall Mount Package Units; Soffit Fan Coils; Unit Heaters; SCE HEER Heat Pump Systems; SCE HEER MiniSplit Systems; Parts. Although this model is a single-staged gas furnace, N9MSE supports Constant Torque blower speed and records AFUE efficiency number of 95%. Variable Frequency Drive or VFD is the way that enables controlling of the speed of induction motor by applying varying frequency of AC supply voltage. The power is just peaking at around 6000rpm. From the formula above we see that a pulsing torque is developed by the motor (see figure 1a, which also shows the speed ripple caused by the torque ripple). I t is more like a continuous blowing approach. Variable speed systems can provide a more flexible and powerful solution compared to using constant-speed pumps. As an 80% furnace it is most suitable for areas with milder winters. A951E Designed to deliver economical warmth One-Stage Gas Valve Constant Torque Blower Motor. This is why good duct design and clean filters are important to ECM equipment. As a result, the power output varies directly with speed. shunt motor has the armature and field resistance of 0. Full torque at variable speeds is what you’ll get for your money. Variable frequency drives and DC drives operate by electronically altering the input power to control the speed of the motor. ECM motors are capable of controlling current and frequency to the motor winding, which in turn provides torque and speed control. It features both a variable speed draft inducer and our patented Vortica™ II variable speed blower motor, to bring you and your home comfort and efficient performance. We offer many furnaces with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. When the field current is reduced, the motor operates above base speed but delivers torque not exceeding the torque required for the delivered mechanical power to remain at or below rated power. and torque when a motor’s speed changes. 59TP6B100V21--20 59 = Family T = Two Stage Gas Valve P = Performance Series 6 = +96% AFUE A = Major Series 100 = 100000 BTU Heating Capacity V = Variable Speed Constant Torque ECM 21 = 21" Casing Width-= Voltage-= Minor Series20 = 2000 CFM Standard Features. Armstrong manufactures two models of single-stage performance furnaces with a constant torque motor. In order to produce the same HP at the lower speed,. The field winding is shunted by variable resistance R. Often the term 5 speed transmission refers simply to the gearbox that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device. OA is decided based on the continuous rating of Traction Motor. When the VFD reduces. 0 Variable Speed Blower Motor With Comfort R ™ • High Efficiency 5-speed Constant Torque Motor • Two-Stage Heat • • • Variable Speed Draft Inducer • Two-Speed Draft Inducer • • Durable Silicon Nitride Hot Surface Igniter. ecocirc® 19-16 is a TRUE Variable Speed ECM Circulator with energy efficient spherical motor technology. Inducer fans are not covered under the regulation. It is simply that they are specified with one of three types of output: constant torque, variable torque, or constant power. Perfect peace and quiet. This means 96% of your fuel is converted into usable heat. Important to match the motor to the load ensure that a change in motor power gives a desired change in load speed Load should have a substantial inertial components inertial torque can "carry" the load through brief periods when motor torque cannot Best used with motors designed for high slip. Variable-speed technology provides contractors with the opportunity to offer superior solutions to their customers. cooled 10-hp motor may be capable of a 10:1 constant-torque speed range, an inverter-duty motor is capable of providing full-rated torque at zero speed as well as operating well over its base speed. For turbocharged or supercharged engines, maximum torque can be kept constant between two engine speed values. However, there are special motor designs aimed at specific applications, such as washdown motors used in food and beverage processing or explosion-proof motors used in hazardous locations. the rated motor torque (power) and ideally greater than 75% of rated motor torque (power). There are 2 types used in HVAC, the constant torque, which has preset "speeds" that vary as the duct conditions vary, and variable speed where you tell the motor the speed you want and it varies its torque to give you close to the airflow you've asked for, even as duct conditions change, like a filter plugging up or vents being shut. The time duration required to accelerate a application from a dead stop to operating speed is given by the following: T = [ N x WR 2 ] / [ T a x 308 ] Open: Electric Motor Time to. 5 seer multi-stage / variable speed; heat pump & back up heat strip. The term “variable speed” refers to the blower motor in the furnace. It is simply that they are specified with one of three types of output: constant torque, variable torque, or constant power. GE - ECM Motor Technology and Troubleshooting Presented by The RLCS Engineering Product Field Support. This alleviates the "cold air blow" often associated with single speed furnaces, and dramatically reduces system noise. The inertia referred to the motor shaft, the type of load (constant or variable torque), and the expected voltage drop must be. Very smart. Both X13 and variable speed motors are DC (or alternating DC if you prefer), 3 phase, permanent magnet rotor motors that use back EMF to determine motor torque and adjust to load conditions. Federal Tax Credits. Since posting the information on ECM motors and standard motors, I have had a number of request for information on the X-13 motors. -Electronic power supplies can also sense the speed of the motor and maintain a constant speed as load is changed. When you're in the market for a new furnace in Massachusetts, you certainly have several options from which to choose, and there are several factors that must be taken into consideration. constant torque motors are permanently magnetized, allowing the motor to require less energy to operate. ECM motors can be either constant torque or variable speed (standard constant torque ECM motors do not have variable speed functionality). These are the applications where you need to have a good understanding of the. A constant speed propeller is a propeller that is designed to automatically change its blade pitch to allow it to maintain a constant RPM, irrespective of the amount of engine torque being produced or the airspeed or altitude at which the aircraft is flying. EFFICIENCy Overall efficiency is rated at 80% AFUE and the Constant Torque blower motor is comparable to more-expensive variable speed motors,. Torque is ft-lb. Infinity 96 Gas Furnace - 59TN6. Constant Torque Variable Frequency Drive Applications January 15, 2015 VFD constant torque , vfd application Drives & Systems Following up on a previous post about the few important formulae when applying variable frequency drives specifically to ac induction motors, this post will get into the topic of constant torque variable frequency drive. Please confirm with current Product Data/Service Facts for current factory production. 3 and Eon (16-pin) the User Interface ( S59-660 ) is required, sold separately • 2-year warranty Order # Mfg. High-efficiency, variable speed furnace Feel the comfort Controlling the flow of air throughout your home is the key to ideal comfort. These are drives that see near constant loading throughout the speed range, but might see overloads on occasion. Valve control of motor speed uses a constant pressure source; a closed center 4-way proportional/servo valve; the motor to be controlled, which propels a load torque at some speed; and an amplifier to supply controllable current. The differences mainly come down to efficiency ratings, followed by the motor type and stages of heating. Additionally, these furnaces boost cooling efficiency up to 1 or more SEER (Seasonal Energy Efficiency Rating) points for additional summer savings. An energy-efficient motor also means a lower monthly utility bill. One of the more common applications we end up working with is the variable torque variety, mainly involving prototypical centrifugal types of pumps. 5 - 5 Ton) CBA38MV Multi-Position - Variable Speed Blower Motor (1. The Power Saver™ constant torque motor in the EL195E adjusts airspeed based on demand. The Rheem R96V 96% efficient two stage gas furnace with variable speed ECM blower and communicating technology was engineered with the exclusive PlusOne Ignition System, the most reliable ignition system in the industry, so you can count on your furnace lighting right every time. The efficiency of an electric motor and drive system is the ratio of mechanical output power to electrical input power and is most often expressed as a percentage. Gas Furnaces. Lennox, one of the leading names in HVAC technology designed the EL195E, equipped with a Power Saver™ motor. Comfort Variable-speed motor produces a consistent flow of air, preventing temperature swings Variable-speed motor Power Saver™ technology is both 1 more efficient and quieter than the standard motor Power Saver constant-torque motor Two-stage heating operates at a more efficient capacity to allow for extra capacity on chilly mornings or evenings. CBA27UHE Upflow/Horizontal - Constant Torque Blower Motor (1. Cooling Capacity Gas V = Variable Speed Numeric code. Both X13 and variable speed motors are DC (or alternating DC if you prefer), 3 phase, permanent magnet rotor motors that use back EMF to determine motor torque and adjust to load conditions. Applications include automotive, hoists, lifts and cranes as it has a high starting torque. Dave Lennox Elite Series Gas Furnaces. They cannot operate from DC; AC is a must. There is a second curved line representing torque beginning at 100% horsepower and torque and 20% speed and proceeding downwards to 20% horsepower and torque at 100% speed. This means 96% of your fuel is converted into usable heat. The term “variable speed” refers to the blower motor in the furnace. What is an ECM Motor? ECM stands for an “electronically commutated motor” which basically means a motor that uses electronic controls to vary its speed. The usual product designation “torque motor” is also maintained for the DRM. I'm replacing my furnace (and installing an AC), and I'm choosing between a Trane S8B1 and XV80. The region of operation above base speed is called the constant power range, while operation at speeds below the base speed is called the constant. These types of loads are where much of the motor efficiency discussion begins with inverter duty ac motors using variable speed drives (VSDs). Variable Torque vs. As a result, the power output varies directly with speed. Oriental Motor has several BLDC packages offering speed control ranges as low as 3 rpm to as high as 4,000 rpm. A fixed-displacement motor provides constant torque. Skip to main content. As the motor speed increases, the load output also increases along with the required horsepower and torque. This is why the same size drive may have a lower HP rating for Constant Torque applications. These furnaces have a two-stage gas valve and a variable-speed blower motor. The mathematical model of DC motor is expressed by following equations:. Attaining maximum usable power requires high peak torque, high continuous torque and high rated speed—the Hudson has all three. Depending on the size (HP) and type, a standard, totally enclosed fan-cooled motor is proficient for a 4:1 up to a 10:1 constant torque speed range. The results are remarkable – higher energy yield and high quality power that is fully compliant with IEEE-519 power quality requirements. The torque of a stepper motor at low speeds is greater than a servo motor of the same size. Unlike single-stage gas furnaces that operate "all on" or "all off," a Goodman Brand two-stage gas furnace typically runs at the lowest possible speed to precisely maintain a. This is a better judge of the motor's performance as it's the motor's torque at speed. Both are more efficient than the typical PSC motor with ECM motors commonly being about 80% efficient and PSC being about 60%. Specifically, Model S8B1B060M3 versus Model TUD2B060A9V3. Additional advantages of armature controlled DC motors include: Constant field current and torque: With the armature control method, the field current and torque levels remain constant throughout the application. Increased Comfort: Variable Speed gas furnaces precisley regulate airflow to provide better control of temperature, humidity and air distribution throughout your home. It is enough if we change just the voltage supplied to it. The load torque acting on the blower wheel is determined by means of a coast down procedure in which the motor is briefly de-energized and the rate of angular change dω/dt is determined. The power produced by the motor depends on the speed of the motor and is. 10-Year registered parts warranty. Torque is ft-lb. When running at 750 rpm it takes 30 A. Variable frequency drives and DC drives operate by electronically altering the input power to control the speed of the motor. The differences mainly come down to efficiency ratings, followed by the motor type and stages of heating. 3 Torque vs speed characteristic for different armature voltages 9 2. I have a company quoting me for a new furnace/AC and one of my options for a new furnace is a Carrier 59TP6B (performance series) 2 stage furnace, but the sales guy let me know that even though it is advertised as having a variable. Variable speed drives uses dc motor. A variable frequency drive (VFD) is used to control the speed of AC motors, and does so by varying the frequency of the supply voltage to the motor. 93) T = d W m d θ This torque expression may also be expressed as in Eq. In a motor, synchronous speed is the speed at which the magnetic field rotates. 135,000 Btu Dave Lennox Signature Collection SL280V Variable Speed Gas Furnace: $1,899. These are in the Trane S9X1 and S9X2 furnaces and have 9 speed settings. 2 Torque proportional to speed The characteristics of the charge imply that the torque required increases with the speed. To reduce the speed to 1000 rpm is not a problem, as long as he keeps the motor speed above 50% of the base speed to produce enough cooling. ECM motors. The range of application includes powers up to 30 MW and output speeds up to 20,000 rpm. (Ke) electromotive force constant 0. There is a second curved line representing torque beginning at 100% horsepower and torque and 20% speed and proceeding downwards to 20% horsepower and torque at 100% speed. Overall, servo motors are best for high speed, high torque applications. A single-speed blower motor costs around $450 to replace while a variable-speed motor costs $600+. This was the situation before three decades. Featuring a quieter fan, constant torque motors are considerably more quiet when in operation. constant torque motors are permanently magnetized, allowing the motor to require less energy to operate. They operate at the most efficient level of comfort inside, no matter what the weather is outside. Exclusive Vortica ™ II blower design that increases airflow efficiency. The main reason I'm even considering the XV80 is because of the variable-speed fan motor. This furnace is not eligible for the Clean Air Furnace Rebate Program: www. Takes a very, very little torque to turn a fan at a very low speed. Variable Speed Electronically Controlled motors include the category known as Electronically Commutated Motors (ECM). On standard induction motors, the full-load speed is typically 96% to 99% of the no-load speed. 2 ohms and field winding resistance is 0. The results are remarkable – higher energy yield and high quality power that is fully compliant with IEEE-519 power quality requirements. Brushed and brushless DC systems provide flat torque over a wide speed range while AC motors often lose torque as speed increases. 94 , when it is further assumed that the inductance of the excited winding at any given. The S9X1 furnace offers a high-efficiency constant torque ECM blower motor for comfort in cold weather, while maintaining the DNA that Trane is known for: quality and reliability. There are 2 types used in HVAC, the constant torque, which has preset "speeds" that vary as the duct conditions vary, and variable speed where you tell the motor the speed you want and it varies its torque to give you close to the airflow you've asked for, even as duct conditions change, like a filter plugging up or vents being shut. The ECM technology in a variable-speed unit allows the blower to run at slower, more energy-efficient speeds, saving as much as 40 percent on electricity costs. 10-Year registered parts warranty. This curve is called the torque-speed characteristic curve. In order to keep the same amount of magnetization of flux, the applied voltage, Vs (more accurately Vm, magnetizing voltage) must be proportional to the electric angular speed, ω. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its development at the time it was approved. They vary their speed to. Lennox Furnace Models. You'll have the cozy and consistent comfort of variable speed operation with a furnace that is extremely efficient in its electrical use year round. In the past, Induction and synchronous motors were employed mainly in constant speed drives. 6" Blower. Increasing the load on the motor causes it to slow down increasing the slip. Matching the speed of the motor to the design parameters enables the motor to operate as efficiently as possible. Additionally, these furnaces boost cooling efficiency up to 1 or more SEER (Seasonal Energy Efficiency Rating) points for additional summer savings. A variable speed motor is regulated responsive to the load torque acting on the blower wheel. SALE on Arduino Motor Pack Before we start, Seeed is having a big sale on our very own Arduino Motor Pack! This pack is a perfect kit for motor learning with Arduino. Increased Efficiency: Compared to a conventional Single-Speed Furnace, a Variable Speed Furnace performs better and uses about 66% less electricity to power the fan motor. Lower the torque, lower the current will be. 2 on page 22 shows the torque-speed curves for a polyphase induction motor operated in an ASD over. Throughout operation, the furnace monitors incoming data from your HVAC system to automatically make blower motor speed adjustments. Variable-speed Motor The variable-speed motor provides the highest efficiency and comfort levels because as its name suggests, it provides a variability of speeds to operate at. As speed is changed, the load torque will remain fairly constant and the horsepower will change linearly with the speed. Internal-combustion engines produce useful torque only over a limited range of rotational speeds (typically from around 1,000–6,000 rpm for a small car). The speed regulation of the split phase motor is nearly same as that the three phase induction motor therefore it is called as constant speed motor. Multi-Speed Motor Cost. Good circulation is crucial to properly maintaining a pool, which is why a variable speed pump can be one of your best pool investments. 0232 volts/rad/sec. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). Perfect peace and quiet. For example, an ac motor rated at 10 hp at 1,800 rpm produces 5 hp at 900 rpm. A 20hp motor in a constant torque application will also use a 20hp VFD. Below base speed, the delivered torque can remain constant, but the delivered mechanical power is reduced in proportion to the speed reduction. With a safe and reliable Ruud gas furnace powering your home's warmth, Ruud has got you covered for many winters to come. Loads of these types are essentially friction loads such as traction drives & conveyors. Continuous stall torque is the motor's continuous torque at 0 speed (at stall). A variable speed drive (VSD) is any drive that can control the speed of a piece of equipment, including both AC and DC motors. The armature of the shunt motor M (whose speed is to be controlled) is connected directly to a d. All help you need! black and decker dewalt dw328k heavy duty variable speed deep cut portable band saw w kit! All in one place! helpwire. If the load is a machine, chances are it is a constant-torque load, and cutting the speed in half will cut the energy usage in half. 3 Torque vs speed characteristic for different armature voltages 9 2. Multi-speed high efficiency (constant torque) blower motor. Constant torque for powerful efficiency. This alleviates the "cold air blow" often associated with single speed furnaces, and dramatically reduces system noise. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). Connected to fan blades, it moves air through your ductwork and into the different rooms of your home. and torque when a motor’s speed changes. Constant Torque With industrial machinery, there are parts that require constant spinning and others that are best spun on a variable basis. If your mechanical system has a higher start-up torque than this, then this motor will not be able to get it running even if the torque required to keep it running is lower than the full load torque. Reducing the inrush current can lessen brownouts and help avoid peak demand surcharges. In Part 1, we’ll discuss how speed differs between motor types, and in Part 2, we’ll look at when to consider adding a gearbox to the application. Controlling the amount of input flow into the motor varies the speed. Efficiency ratings Consider the AFUE (Annual Fuel Utilization Efficiency). Backed by the intelligent Infinity control and a variable-speed blower, this furnace will run in low stage up to 90% of the time. We have all seen the data on a motor nameplate – power, current, speed in rpm and all of the rest. We offer many furnaces with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. decreases to its former value; then the motor operates at a lower fixed speed than before. The Evergreen ® VS motor and Evergreen VS user interface are designed to replace Genteq ® constant airflow (variable speed) ECM indoor blower motors. From an engineering perspective, these motors increase the efficiency of the systems and offer a whole range of other benefits that help the system and the consumer. Increased Comfort: Variable Speed gas furnaces precisley regulate airflow to provide better control of temperature, humidity and air distribution throughout your home. Supported by the Performance Edge thermostat and a variable-speed blower motor, this furnace will run in low stage up to 90% of the time. This helps the furnace use less energy in both heating and cooling modes. Infinity 96 Gas Furnace - 59TN6. 5 Natural neurons (artist’s conception) 12 2. With more than 50 years of experience in variable speed drive business, Driveswarehouse stocks a large selection of AC Drives , DC Drives , Variable Frequency Drives (VFD) , Variable Speed Drives, Adjustable Speed Drives, Adjustable Frequency Drives, Combo (AC Motor and Drive Combination and DC Motor and Drive Combination) in a wide range of. Torque Formula For Motor. and torque when a motor’s speed changes. A VFD is intended to provide CONSTANT torque regardless of commanded speed, so as speed drops, so does HP. This is why good duct design and clean filters are important to ECM equipment. 88 ft lb of torque, but it will split wood at less than 1/4 the speed of the 9. I find myself wondering if it would be better to control the speed of the motor by placing a flat lower constant voltage across its terminals, rather than oscillating a square wave. m/Amp (R) electric resistance 1 Ohm (L) electric inductance 0. These types of loads are where much of the motor efficiency discussion begins with inverter duty ac motors using variable speed drives (VSDs). The EL296UH070XE36B's Power Saver™ Constant Torque motor is up to 33% more efficient than standard single-stage motors and up to 200% more efficient in constant fan mode. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). Search in GE Motors catalogs and technical brochures on DirectIndustry and find the information you need in 1 click. Then steady state speed and torque satisfy Ω = K MV − RT L K MK V + RB T M = K M(V B + K V T L) K MK V + RB • Torque-speed curve W T M increasing V EECS461, Lecture 6, updated September 17, 2008 3. That means there's more air going through the filter and therefore, more contaminants (bacteria, viruses, and mold spores) are being removed. Depending on the specific model of motor and the VFD control methodology, the manufacturer allowed turndown ratio may be dramatically worse with constant torque loads. Variable Speed Blower Motor s. As the load on the motor is increased, the motor torque and. By far the main drawback of attempting to control airflow either with an SCR or tapped motors is the. The main reason I'm even considering the XV80 is because of the variable-speed fan motor. * Information subject to change. The blower in a gas furnace operates all year long to circulate hot air or cold air throughout your home. Essentially, an electric motor is a constant torque device, so, as one reduces speed, the energy usage also reduces. A slower motor also means that the motor’s rated power would be reduced. 15 - 16 seer variable speed; 16 - 19. Heat is delivered in stages to help prevent drafts. Compared to standard PSC motors, constant torque delivers more consistent airflow and quieter operation. The constant torque motor on the A951E provides an ef ficient, steady flow of air for more even temperatures. CONSTANT SPEED TORQUE Variable Speed Constant Speed 9. Each furnace is built with efficiency and reliability in mind so that you and your family can enjoy consistent warmth and long-lasting comfort. This furnace is not eligible for the Clean Air Furnace Rebate Program: www. My boss came up to me today and he was apparently told that he should switch out his AC fan motor for his home furnace out to DC, because the current consumption would be 1/3 with the DC motor. What is Special about the Constant Torque motor? Developed by Regal Beloit in 2006 under the designation "X-13", the Constant Torque motor is a high efficiency, brushless DC motor. M1 may be any AC motor or DC motor with constant speed. In their most basic form, furnaces are pretty simple. Torque is a measurement of the amount of work the motor is doing. AC drive applications can generally be divided into constant torque or variable torque. Important to match the motor to the load ensure that a change in motor power gives a desired change in load speed Load should have a substantial inertial components inertial torque can "carry" the load through brief periods when motor torque cannot Best used with motors designed for high slip. 6 An artificial neuron 12 2. A variable speed drive (VSD) is any drive that can control the speed of a piece of equipment, including both AC and DC motors. The Y axis is the percent of HP and torque. Self-diagnosing integrated furnace control (IFC). Efficiency ratings Consider the AFUE (Annual Fuel Utilization Efficiency). A variable speed drive controls motor speed and torque by varying the motor input voltage and frequency. Single-Stage Performance with Constant Torque Motors. Above 60 Hz output is the "constant power" range. Plus, a variable speed motor gradually ramps up to full speed eliminating the sudden, noisy blast of a standard furnace motors. Examples of constant torque loads include cranes, hoists, conveyors, extruders, mixers. The primary advantage of the DC motor is that it can develop constant torque over a wide speed application. A951E Designed to deliver economical warmth One-Stage Gas Valve Constant Torque Blower Motor. Step Motor Basics Guide. I'm replacing my furnace (and installing an AC), and I'm choosing between a Trane S8B1 and XV80. Or, more specifically, researching the differences between fixed speed, multi-speed, and variable speed motors in your furnace or HVAC system. RE: hammer mill - constant torque or variable torque? niallnz (Electrical) 18 Jun 09 18:00 Star for DickDV, I have made the mistake of underestimating the short term torque requirements of a similar load, only clever programming of the drive let me get away with it. Complies with California's south coast air quality. Torque is. The S9V2-VS furnace is a high efficiency two stage furnace that achieves 97% gas efficiency (AFUE). Overview of Variable Frequency Drives. When running at 750 rpm it takes 30 A. The EL180NE's Power Saver™ motor operates at constant torque to maintain a consistent flow of air. Learn more about the 820SA Multi-speed 80% Efficiency Gas Furnace from Bryant. frequency will change the motor speed. Figure 1 below visually illustrates these changes. 440-44-2016-06. standard PSC motors, have led to calls for regulating the efficiency of air handler blower motors and even furnace induced draft blower motors and air conditioner condenser fan motors. Compared to a fixed-speed (PSC) blower motor, a constant-torque or variable-speed blower motor will provide everyday savings on your electric bill. Due to divert the field current through the variable resistance path, the flux Φ reduces. Compared to standard PSC motors, constant torque delivers more consistent airflow and quieter operation. Low Voltage and Medium Voltage AC variable speed drives. Inverter/Vector motors are designed specifically for adjustable speed applications in a standard NEMA Frame motor. If anyone can offer definitions, that would be very helpful. Bryant has manufactured forced air heating systems since 1904 and has been implementing high-efficiency features, including an enhanced variable-speed blower motor, in its best furnaces since 1981. Two-stage gas furnace with variable speed motor, remote monitoring and programming for consistent heating. 0 out of 5 stars 2. zero at 0% speed, and; normally at it's top at operating speed; Note! - the full torque from zero speed is a major advantage for electric vehicles. In addition, the more times your water turns over in a day — how many times the full volume of water in the pool passes through the circulation. Power Saver™ motor Not only provides energy boost capabilities improving the overall system efficiency, similar to a variable speed furnace, but also delivers higher SEER ratings in cooling mode. M1 may be any AC motor or DC motor with constant speed. For example, with a standard squirrel cage motor wound for 230 Volts at 60 Hertz, the. In general, motors have the following characteristics: For rotating objects: HP= T∗N 5252 Eq. • Under standard residential operating conditions, a variable speed ECM is typically 40 per cent more efficient than a PSC motor. In this method, the output from generator G is fed to the armature of the motor M 2 whose speed is to be controlled. Lennox, one of the leading names in HVAC technology designed the EL195E, equipped with a Power Saver™ motor. Gas Furnaces Today's new high efficiency furnaces can save up to 50% in operating costs over a ten-year-old furnace. Torque: The torque output of a motor, at its most basic form, is the amount of rotating force the motor develops. When the VFD reduces frequency and motor speed, it also reduces voltage to keep the volts/hertz ratio constant. In order to produce the same HP at the lower speed,. Advantages of a variable speed furnace that make it a smart investment Lower operating costs. A variable-speed motor is a component of high-performance residential furnaces and air handlers. Unit only used for 2-3 years. The constant torque ECM motor maintains efficiency across a range of operating speeds, using less electrical energy than a standard PSC motor. Slow down and have more fun! Chris Marshall: There’s a reason why typical drill presses and lathes with induction-style AC motors have stepped pulley systems: you can’t vary their operating speed electrically without potentially overheating the motor and damaging it. The time duration required to accelerate a application from a dead stop to operating speed is given by the following: T = [ N x WR 2 ] / [ T a x 308 ] Open: Electric Motor Time to. Known variables: Weight (lbs), Linear Velocity (ft/min), Speed of Driving Motor (RPM), Change in Speed (RPM), and Time to Accelerate Total System (sec) In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load. The most obvious benefit of varying the torque is to maintain a constant speed when the motor’s load varies, keeping in mind the interdependent nature of speed, torque, and voltage. As the load on the motor is increased, the motor torque and. , filters and valves. Constant and variable torque speed range examples (Base speed = 2500 RPM) Motor Cooling: There are two general methods of motor cooling or ventilation: 1) Speed dependent: this method is used in totally-enclosed fan cooled or open drip-proof motors. A cross-section of a cen-trifugal pump is shown (Fig. As a result, the power output varies directly with speed. Continuous stall torque is the motor's continuous torque at 0 speed (at stall). As the speed changes, the load torque remains constant and the horsepower changes linearly with speed. In their most basic form, furnaces are pretty simple. The usual product designation “torque motor” is also maintained for the DRM. This winding configuration is often called bifilar. If you live in the northern half of the US, Energy Star recommends furnaces that deliver 95% AFUE or higher. This provides several benefits, including energy savings, lower need for maintenance, improved comfort and better airflow and indoor air quality. By controlling the output AC frequency, it is possible to drive the motor at different speeds based on the requirements. All of the above terms are used to refer to the same thing: DC Motors. GE's latest range of MV7000 Medium Voltage drives (power range up to 81 MW) is based on a modern IGBT device. This type of motor operates on the principle of minimizing the reluctance along the path of the applied magnetic field. In this method the output from the generator G is fed to the armature of the motor M2 whose speed is to be controlled. 8 Constant Torque or X13 16 10. Variable-speed technology alone makes the CBX25UHV exceptionally quiet. constant torque motors are permanently magnetized, allowing the motor to require less energy to operate. Essentially, an electric motor is a constant torque device, so, as one reduces speed, the energy usage also reduces. HVAC ECM – Evolution and Industry Regulations. 3, EON, and 3. Factors such as your lifestyle, the size of your home, and your locality, a constant torque motor-powered furnace can help you save up to several hundred dollars in energy savings per year, compared to a standard PSC motor. How is motor efficiency impacted when the motor is controlled by a variable frequency drive (VFD)? A. Variable Frequency Drive or VFD is the way that enables controlling of the speed of induction motor by applying varying frequency of AC supply voltage. The mid-range constant torque motor if need to account for static pressure in the ducts will deliver exactly what is needed at a constant torque. Depending on the size (HP) and type, a standard, totally enclosed fan-cooled motor is proficient for a 4:1 up to a 10:1 constant torque speed range. the rated motor torque (power) and ideally greater than 75% of rated motor torque (power). With some products, Velocity mode operation can include capacity for regeneration. Standardized widths for easy coil fit. Furnace motor replacement presents an opportunity for improvement. Variable torque variable frequency drives need only an overload current capacity of 120% for one minute since centrifugal applications rarely exceed the rated current. This is why good duct design and clean filters are important to ECM equipment. Since 1985, furnace manufacturers have used higher efficiency, variable-speed BPM fan motors (also known as electronically commutated motors or ECMs) in some high-end residential furnaces. 5488 for the kilowatt rating. 3 — latest edition. 0316 Vrad/s. 75 96% A952V Variable Speed 96% AFUE A952V040BU3SAB 40,000 3 34 x 17. Variable-speed, constant torque (VCT) ECM blower motor for great comfort;. Furnaces without variable speed technology use a simple motor with multiple speed settings. Electric motors generate maximum torque at zero speed, that's perfect for cars where you need the most torque to pull away from a stop. Like a variable speed air handlers, constant torque air handlers provide lower operating costs and increase overall system efficiency. Inducer fans are not covered under the regulation. Higher numbers mean greater efficiency and lower gas bills for you. shunt motor with constant field drives a load whose torque is proportional to the speed. What is the Kt Constant in a Brushless DC Motor? Winding Power = Kt*Kt/R Kv = 1000 rpm / Vrms Kt = oz-in / Amp Kt = Kb * 1. At 60 hertz (base motor speed), both HP and torque are at 100 percent. 2 Torque proportional to speed The characteristics of the charge imply that the torque required increases with the speed. torque at the maximum speed. What remains to be seen is if the energy savings justify the significantly higher upfront cost of the ECM. Variable Speed Drive (VSD) This more generic term applies to devices that control the speed of either the motor or the equipment driven by the motor (fan, pump,. The winder motor will be controlled by a motor controller, also called a drive, that will regulate a fixed motor current. Reduce costs and improve airflow with Trane's high efficiency constant torque or variable speed ECM motors Single-zone and Multi-zone ductless split heat pumps from 9,000 to 60,000 BTU Worry-free installations by licensed professionals. These speeds are used by a contractor to adjust airflow to the proper amount. The inertia referred to the motor shaft, the type of load (constant or variable torque), and the expected voltage drop must be. The graph shows the torque-speed characteristics of a shunt dc motor. Compressor applications are constant torque, where torque remains relatively constant (assuming constant air pressure) as speed varies. • Motor starts softly, ramps to proper speed. Unlike the abrupt start/stop cycles of a conventional motor, a Tech2 variable-speed furnace ramps up to speed gradually to eliminate temperature swings and reduse noise. MOTORS® SelecTech® and the Regal™* X13motors. The gear ratio is the measure to which the device amplifies rotational force, while decreasing revolution rates. It has only to do with the desired short-term overload capacity. (Constant torque loads require the same amount of torque from the motor regardless of speed; e. mov Perfect Airflow with Azure® Hand Held Programmer. A possible remedy to get a servo motor with high torque is to add a gearhead—an arrangement of gears ensuring proportional speed-to-torque conversion. There are three types of ECM motors: constant cfm, constant rpm, and constant torque. It features both a variable speed draft inducer and our patented Vortica™ II variable speed blower motor, to bring you and your home comfort and efficient performance. Additionally, the AC Inverter/Vector Motors can be ran across the line for bypass operation and can deliver a 1000:1 Speed Range in a standard TENV. Better humidity control. S-Series Furnace Model S9V2-VS S9V2 S9X2 Annual Furnace Usage Efficiency - ( AFUE) up to 97. Think about HVAC fans and sump pumps. Since motors are constant torque machines then by applying the formula that HP = (torque*n)/5252 then you can see that with a 20% increase in speed the motor would also then be able to produce 20% more horsepower. At 60 hertz (base motor speed), both HP and torque are at 100 percent. The popular X13 motors by Genteq are constant torque ECM motors. The motor's power rating of is the maximum power that motor can deliver when it is run at the full rated speed (i. Longer, low-stage run times give you better energy efficiency, better temperature control and increased comfort. ecocirc® 19-16 is a TRUE Variable Speed ECM Circulator with energy efficient spherical motor technology. The Comfort Heat Technology® two-stage gas system is at the heart of the comfort provided by this furnace, along with the Infinity variable-speed ECM blower motor, and two-speed inducer motor. online store of Polyspede Electronics Corporation. A single-phase motor can be operated by simply connecting it to a single-phase power supply via the supplied capacitor. I'm replacing my furnace (and installing an AC), and I'm choosing between a Trane S8B1 and XV80. When doing so, however, the equality of both sides of the equation must be maintained. Stainless steel primary and secondary heat exchangers resist corrosion for long-lasting performance. 0 motors • To replace 2. Now onto Constant Torque drives. Many industrial processes such as assembly lines must operate at different speeds for different products. Attaining maximum usable power requires high peak torque, high continuous torque and high rated speed—the Hudson has all three. On the fan-cooled AC motor, a slower speed may mean that the fan will not turn off the motor. We have all seen the data on a motor nameplate – power, current, speed in rpm and all of the rest. The constant airflow systems tend to be more high-end, so what the regulation likely means for most furnaces is a shift from induction motors to constant-torque ECMs. The 2 speed ECM is most likely an X13 ECM motor, meaning it has been pre-programmed to operate at specific torques. The speed of the three phase induction motor at low speed is not economical. Efficiency ratings Consider the AFUE (Annual Fuel Utilization Efficiency). The mid-range constant torque motor if need to account for static pressure in the ducts will deliver exactly what is needed at a constant torque. Adjustable Speed Drive Part-Load Efficiency is a device that controls the rotational speed of motor-driven equipment. Each of them have different levels of efficiency, expected operating life, comfort level and servicing needs. This means the drive keeps going with these types of overloads. 7% modulating furnaces, XC25 (26 SEER) air conditioner and XP25 (23.