direct torque control of induction motors
... ⇒ Space vector representation ⇒ Fundamental concept of DTC ⇒ Rotor flux reference ⇒ Voltage vector selection criteria ⇒ Amplitude of flux and torque hysteresis band ⇒ Direct self control (DSC) ⇒ SVM applied to DTC ⇒ Flux estimation at low speed ⇒ Sensitivity to parameter variations and current senso ...
... ⇒ Space vector representation ⇒ Fundamental concept of DTC ⇒ Rotor flux reference ⇒ Voltage vector selection criteria ⇒ Amplitude of flux and torque hysteresis band ⇒ Direct self control (DSC) ⇒ SVM applied to DTC ⇒ Flux estimation at low speed ⇒ Sensitivity to parameter variations and current senso ...
International Electrical Engineering Journal (IEEJ) Vol. 5 (2014) No.10, pp. 1567-1575
... appliances. The conventional technologies doesn’t meet these demands. The use of special electrical machines like brushless DC motors (BLDC), permanent magnet synchronous motors (PMSM) in these appliances are a better choice due to the features of high reliability, high efficiency, low maintenance, ...
... appliances. The conventional technologies doesn’t meet these demands. The use of special electrical machines like brushless DC motors (BLDC), permanent magnet synchronous motors (PMSM) in these appliances are a better choice due to the features of high reliability, high efficiency, low maintenance, ...
BC203 Regenerative Drive Adjustable Speed DC Control
... technology. The BC203 is a full-wave regenerative drive capable of operating DC PM (Permanent Magnet) or Shunt wound motors in a bidirectional mode. Its 4-quadrant operation provides forward and reverse torque in both directions. This allows the control to maintain constant speed with overhauling lo ...
... technology. The BC203 is a full-wave regenerative drive capable of operating DC PM (Permanent Magnet) or Shunt wound motors in a bidirectional mode. Its 4-quadrant operation provides forward and reverse torque in both directions. This allows the control to maintain constant speed with overhauling lo ...
A Simplified System for Subsynchronous Resonance Studies
... The induction effect on the stator currents is still present however and affects the torque. But this induction effect is not induction generator effect. For induction generation we first need to have an induction effect on the rotor circuits to be reflected later on the stator side. With the assump ...
... The induction effect on the stator currents is still present however and affects the torque. But this induction effect is not induction generator effect. For induction generation we first need to have an induction effect on the rotor circuits to be reflected later on the stator side. With the assump ...
Variable Speed Operation
... limit. Refer to the Maximum Safe Mechanical Speed Chart, as well as the performance section for each motor’s capability. Motors rated for zero RPM continuous duty (1000:1 or 2000:1) must be powered by vector drives to produce rated torque without overheating. Optimum zero speed and lowspeed full tor ...
... limit. Refer to the Maximum Safe Mechanical Speed Chart, as well as the performance section for each motor’s capability. Motors rated for zero RPM continuous duty (1000:1 or 2000:1) must be powered by vector drives to produce rated torque without overheating. Optimum zero speed and lowspeed full tor ...
power loss ride-through in a variable speed drive system
... is based on experience with the behavior of large electric motors, connected directly on the supply line (DOL motors). As however will be shown in paragraph III, the DOL motor’s behavior during a power outage is quite complex, e.g. for small asymmetric undervoltage, it is still providing torque, but ...
... is based on experience with the behavior of large electric motors, connected directly on the supply line (DOL motors). As however will be shown in paragraph III, the DOL motor’s behavior during a power outage is quite complex, e.g. for small asymmetric undervoltage, it is still providing torque, but ...
Speed Control of High-Speed BLDC with Pulse Amplitude
... different numbers of phases contribute to the torque at different instants of time. From the previous two cases, we realize that we need a combination of 180' unipolar currents and small back-emf width to reduce the torque pulsation. To investigate this case, we consider the 6-slot motor shown in Fi ...
... different numbers of phases contribute to the torque at different instants of time. From the previous two cases, we realize that we need a combination of 180' unipolar currents and small back-emf width to reduce the torque pulsation. To investigate this case, we consider the 6-slot motor shown in Fi ...
EEEB283 Electrical Machines & Drives
... Variable Voltage (amplitude), Constant Frequency Disadvantages: limited speed range when applied to Class B (low-slip) motors Excessive stator currents at low speeds high copper losses Distorted phase current in machine and line (harmonics introduced by thyristor switching) Poor line p ...
... Variable Voltage (amplitude), Constant Frequency Disadvantages: limited speed range when applied to Class B (low-slip) motors Excessive stator currents at low speeds high copper losses Distorted phase current in machine and line (harmonics introduced by thyristor switching) Poor line p ...
Solid Solutions in a Fluid Environment
... Equipments Manufacturers (OEM) in the Michigan market. It is the leading mobile OEM supplier for fluid power products and has a team of skilled engineers to design your mobile equipment, industrials circuits or refurbishment projects. DTS Fluid Power is a subsidiary of Applied Industrial Technologie ...
... Equipments Manufacturers (OEM) in the Michigan market. It is the leading mobile OEM supplier for fluid power products and has a team of skilled engineers to design your mobile equipment, industrials circuits or refurbishment projects. DTS Fluid Power is a subsidiary of Applied Industrial Technologie ...
Flux Weakening Control for Stator-Doubly-Fed Doubly - EVS-24
... principle of flux weakening of the stator-doubly-fed doubly salient (SDFDS) motor which is designed for EVs has been studied and analyzed. And its advantage of regulating the field flux independently has been fully utilized. The flux weakening strategy is proposed and high performance of SDFDS motor ...
... principle of flux weakening of the stator-doubly-fed doubly salient (SDFDS) motor which is designed for EVs has been studied and analyzed. And its advantage of regulating the field flux independently has been fully utilized. The flux weakening strategy is proposed and high performance of SDFDS motor ...
Wide-Speed Operation of Direct Torque
... Due to their many positive features, including high torqueto-inertia and power-to-weight ratios, fast dynamics, compact design and low maintenance, inverter-fed interior permanent-magnet synchronous motors (IPMSMs) are viable contenders for industrial drives with high torque capability over a wide s ...
... Due to their many positive features, including high torqueto-inertia and power-to-weight ratios, fast dynamics, compact design and low maintenance, inverter-fed interior permanent-magnet synchronous motors (IPMSMs) are viable contenders for industrial drives with high torque capability over a wide s ...
TND6197 - Stepping Motors and Stepping Motor Control System
... 1. Stepper Motors − These motors are self-positioning, and therefore simple to use. They do not require an encoder to maintain their position nor do they require a servo control loop. Their main drawbacks are vibration and noise, and limited speed range. Like brushless DC motors they must be “commut ...
... 1. Stepper Motors − These motors are self-positioning, and therefore simple to use. They do not require an encoder to maintain their position nor do they require a servo control loop. Their main drawbacks are vibration and noise, and limited speed range. Like brushless DC motors they must be “commut ...
PDF
... motor horsepower exceeds approximately 30% of the supply transformer(s) base kVA rating, if no generators are present [2]. Whereas, If generator is present, and no other sources are involved, an analysis should be done whenever the motor horsepower exceeds 10–15% of the generator kVA rating, dependi ...
... motor horsepower exceeds approximately 30% of the supply transformer(s) base kVA rating, if no generators are present [2]. Whereas, If generator is present, and no other sources are involved, an analysis should be done whenever the motor horsepower exceeds 10–15% of the generator kVA rating, dependi ...
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... and Imaxcos(ωt + 120°) -- square them, multiply by the resistance R, and then add, the result is the constant (3/2)Imax2R = 3 I2R. The power is applied steadily as in DC circuits -- not in pulses as in single-phase AC circuits. This is a great advantage, giving 3-phase machines 48% greater capacity ...
... and Imaxcos(ωt + 120°) -- square them, multiply by the resistance R, and then add, the result is the constant (3/2)Imax2R = 3 I2R. The power is applied steadily as in DC circuits -- not in pulses as in single-phase AC circuits. This is a great advantage, giving 3-phase machines 48% greater capacity ...
Direct Torque Control of Permanent Magnet Synchronous Motor
... Abstract— Due to the features such as high efficiency and high power density Permanent Magnet Synchronous Motors (PMSM) are becoming attractive. In high performance servo applications a rapid and accurate torque control is desired preferably without the use of motion state sensor. The use of PMSM co ...
... Abstract— Due to the features such as high efficiency and high power density Permanent Magnet Synchronous Motors (PMSM) are becoming attractive. In high performance servo applications a rapid and accurate torque control is desired preferably without the use of motion state sensor. The use of PMSM co ...
Guidelines for Paper Preparation
... with permanent magnets (PMs) inserted in the rotor [6, 911]. The rotor can have many types of configurations since the inserted PMs may have different shapes, materials, sizes and positions [2, 4, 12, 13], which deeply influence the performances of the machine. The line-start property is obtained th ...
... with permanent magnets (PMs) inserted in the rotor [6, 911]. The rotor can have many types of configurations since the inserted PMs may have different shapes, materials, sizes and positions [2, 4, 12, 13], which deeply influence the performances of the machine. The line-start property is obtained th ...
Annotated - Electrical and Computer Engineering
... In a transformer energy is transferred from primary to secondary, form of energy (electrical) is unchanged. In a ROTATING ELECTRIC MACHINE (M/C or m/c), electrical energy is converted into mechanical form and vice versa: Electric Motor Electric energy to Mechanical Energy. Electric Generator ...
... In a transformer energy is transferred from primary to secondary, form of energy (electrical) is unchanged. In a ROTATING ELECTRIC MACHINE (M/C or m/c), electrical energy is converted into mechanical form and vice versa: Electric Motor Electric energy to Mechanical Energy. Electric Generator ...
CDR - University of Colorado Boulder
... • This should require that the valve should open each day for 3 seconds • Monitor pressure data • Determine the leakage rate and compare to prediction • Determine how often to open valve (and for how long) in order to maintain pressure • Basic setup includes previous setup and the ...
... • This should require that the valve should open each day for 3 seconds • Monitor pressure data • Determine the leakage rate and compare to prediction • Determine how often to open valve (and for how long) in order to maintain pressure • Basic setup includes previous setup and the ...
Selecting Electric Motors
... • Totally-Enclosed: no openings for circulation of outside air through motor – may use external fan – higher operating temperature ...
... • Totally-Enclosed: no openings for circulation of outside air through motor – may use external fan – higher operating temperature ...
iES-2309Integrated Easy Servo Motor + Drive +
... configurable), this input represents clockwise (CW) pulse, active both at each high level and low level. 4.5-24V for PUL-HIGH, 0-0.5V for PUL-LOW. For reliable response, pulse width should be longer than 2.5μs for 200K MAX input frequency or 1μs for 500K MAX input frequency. Direction Signal: In sin ...
... configurable), this input represents clockwise (CW) pulse, active both at each high level and low level. 4.5-24V for PUL-HIGH, 0-0.5V for PUL-LOW. For reliable response, pulse width should be longer than 2.5μs for 200K MAX input frequency or 1μs for 500K MAX input frequency. Direction Signal: In sin ...
code issues Motor Design Letters and By James Stallcup Sr., NEC/OSHA Consultant
... Compound DC motors provide a starting torque of 180 to 260 percent of the full-load torque and a constant speed. The compound DC motor is equipped with a series and a shunt winding. The series winding is connected in series with the armature and the shunt winding is connected in parallel with the ar ...
... Compound DC motors provide a starting torque of 180 to 260 percent of the full-load torque and a constant speed. The compound DC motor is equipped with a series and a shunt winding. The series winding is connected in series with the armature and the shunt winding is connected in parallel with the ar ...
DC Machines - Electrical and Computer Engineering
... Universal Motor’s advantages Compared with other types of single-phase ac motors, the universal motor has several advantages: 1- For a given weight, universal motors produce more power than other types. This is a large advantage for hand-held tools and small appliances, such as drills, saws,mixers, ...
... Universal Motor’s advantages Compared with other types of single-phase ac motors, the universal motor has several advantages: 1- For a given weight, universal motors produce more power than other types. This is a large advantage for hand-held tools and small appliances, such as drills, saws,mixers, ...
DA33612620
... discussed in [5] basically two methods are available for controlling PMBLDC motor. They are sensor control and sensor less control. To control the machine using sensors, the present position of the rotor is required to determine the next commutation interval. Motor can also be controlled by controll ...
... discussed in [5] basically two methods are available for controlling PMBLDC motor. They are sensor control and sensor less control. To control the machine using sensors, the present position of the rotor is required to determine the next commutation interval. Motor can also be controlled by controll ...
Janssen, N. T., R. W. Wies, and R. A. Peterson. Jul 2014
... modes, depending on the wind resources and the consumer grid demand: diesel-only (DO), wind-diesel (WD) and windonly (WO). Few successful systems have been shown to consistently and smoothly transition between wind-diesel and wind-only modes. The University of Alaska – Fairbanks Alaska Center for En ...
... modes, depending on the wind resources and the consumer grid demand: diesel-only (DO), wind-diesel (WD) and windonly (WO). Few successful systems have been shown to consistently and smoothly transition between wind-diesel and wind-only modes. The University of Alaska – Fairbanks Alaska Center for En ...
Load and Speed Characteristics of an Actuator
... The specifications on the spindle also have a large effect on how fast the actuator moves, but mostly how much load it is capable of holding. The specs on a spindle (or screw) include the pitch, lead, and number of starts. The pitch is the axial distance from a crest on a screw thread to the equival ...
... The specifications on the spindle also have a large effect on how fast the actuator moves, but mostly how much load it is capable of holding. The specs on a spindle (or screw) include the pitch, lead, and number of starts. The pitch is the axial distance from a crest on a screw thread to the equival ...
Dynamometer
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A dynamometer or ""dyno"" for short, is a device for measuring force, torque, or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (RPM).A dynamometer can also be used to determine the torque and power required to operate a driven machine such as a pump. In that case, a motoring or driving dynamometer is used. A dynamometer that is designed to be driven is called an absorption or passive dynamometer. A dynamometer that can either drive or absorb is called a universal or active dynamometer.In addition to being used to determine the torque or power characteristics of a machine under test (MUT), dynamometers are employed in a number of other roles. In standard emissions testing cycles such as those defined by the United States Environmental Protection Agency (US EPA), dynamometers are used to provide simulated road loading of either the engine (using an engine dynamometer) or full powertrain (using a chassis dynamometer). In fact, beyond simple power and torque measurements, dynamometers can be used as part of a testbed for a variety of engine development activities, such as the calibration of engine management controllers, detailed investigations into combustion behavior, and tribology.In the medical terminology, hand-held dynamometers are used for routine screening of grip and hand strength, and the initial and ongoing evaluation of patients with hand trauma or dysfunction. They are also used to measure grip strength in patients where compromise of the cervical nerve roots or peripheral nerves is suspected.In the rehabilitation, kinesiology, and ergonomics realms, force dynamometers are used for measuring the back, grip, arm, and/or leg strength of athletes, patients, and workers to evaluate physical status, performance, and task demands. Typically the force applied to a lever or through a cable is measured and then converted to a moment of force by multiplying by the perpendicular distance from the force to the axis of the level.