the control of switched reluctance drives
... angles. The control is similar to the current chopping control in motoring mode. At higher speeds the generator is operated in single-pulse mode. Adapting the commutation angles regulates the current. As the speed increases, also the amplitude of the negative back emf increases and may become larger ...
... angles. The control is similar to the current chopping control in motoring mode. At higher speeds the generator is operated in single-pulse mode. Adapting the commutation angles regulates the current. As the speed increases, also the amplitude of the negative back emf increases and may become larger ...
Comparison Study of Singly-Fed Electric Machine with Doubly
... windings are unchanged. Also true is that the stator core losses are not changed while the rotor core losses could be more than that of the IPM and IM but with a big benefit of doubling both the output speed and torque. It is reasonable to derive that a doubly-fed motor will have larger and balanced ...
... windings are unchanged. Also true is that the stator core losses are not changed while the rotor core losses could be more than that of the IPM and IM but with a big benefit of doubling both the output speed and torque. It is reasonable to derive that a doubly-fed motor will have larger and balanced ...
UNIT 6 DC Compound Wound Motor
... Current Limit Protection Switch Modules, Magnetic Powder Brake Unit and Brake Controller. 12. Using the results of Table 6-2-1, plot the N vs T curve on the graph of Fig. 6-2-3. 13. Using the results of Table 6-2-1, plot the I vs T curve on the graph of Fig. 6-2-4. 14. Using the results of Table 6-2 ...
... Current Limit Protection Switch Modules, Magnetic Powder Brake Unit and Brake Controller. 12. Using the results of Table 6-2-1, plot the N vs T curve on the graph of Fig. 6-2-3. 13. Using the results of Table 6-2-1, plot the I vs T curve on the graph of Fig. 6-2-4. 14. Using the results of Table 6-2 ...
A Motor Designer Looks at Positive Temperature - Purdue e-Pubs
... run motor of the same size if a start capacitor or PTCR were added. The refrigerator is, on the average, the largest consumer of electrical energy in the home. Therefore the increased efficiency possible with the capacitor motor is attractive, especially where space prohibits the use of a larger ind ...
... run motor of the same size if a start capacitor or PTCR were added. The refrigerator is, on the average, the largest consumer of electrical energy in the home. Therefore the increased efficiency possible with the capacitor motor is attractive, especially where space prohibits the use of a larger ind ...
Full text - Linköping University Electronic Press
... The continuous progress in the electrification of the these models only consider ohmic losses. Therefore, powertrain in the automotive industry requires nu- this paper describes the implementation of advanced meric based computer simulations to handle the grow- control for the MSL machine models of ...
... The continuous progress in the electrification of the these models only consider ohmic losses. Therefore, powertrain in the automotive industry requires nu- this paper describes the implementation of advanced meric based computer simulations to handle the grow- control for the MSL machine models of ...
DC Drives
... reduced (below eg). The current ia will reverse direction.Operating point is shifted to B. • Since ia is negative, torque Te is negative. • Power is also negative, which implies power is “generated” back to the supply. • In other words, during the deceleration phase, kinetic energy from the motor an ...
... reduced (below eg). The current ia will reverse direction.Operating point is shifted to B. • Since ia is negative, torque Te is negative. • Power is also negative, which implies power is “generated” back to the supply. • In other words, during the deceleration phase, kinetic energy from the motor an ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... IM control technique using direct torque control (DTC), was introduced about a few year ago, has a relatively simple and wide range of control structure at least as good as the FOC technique . It is also known that DTC drive is less sensitive to parameter changing. DTC method is based mainly on spac ...
... IM control technique using direct torque control (DTC), was introduced about a few year ago, has a relatively simple and wide range of control structure at least as good as the FOC technique . It is also known that DTC drive is less sensitive to parameter changing. DTC method is based mainly on spac ...
No Slide Title
... several times ( up to about 6 times) its rated current. As the load accelerates, the available torque usually drops a little and then rises to a peak while the current remains very high until the motor approaches full speed. By contrast, when a VFD starts a motor, it initially applies a low frequenc ...
... several times ( up to about 6 times) its rated current. As the load accelerates, the available torque usually drops a little and then rises to a peak while the current remains very high until the motor approaches full speed. By contrast, when a VFD starts a motor, it initially applies a low frequenc ...
Dayton Permanent Magnet DC Voltage Type Gearmolors
... brushes for replacement. After installing new brushes, run the gearmotor at rated speed for approximately 1/2 hour with no load to seat the new brushes. Failure to properly seat new brushes may cause them to wear too quickly and may cause commutator damage. If the commutator becomes rough, scored, o ...
... brushes for replacement. After installing new brushes, run the gearmotor at rated speed for approximately 1/2 hour with no load to seat the new brushes. Failure to properly seat new brushes may cause them to wear too quickly and may cause commutator damage. If the commutator becomes rough, scored, o ...
Flux weakening operation of switched reluctance motors
... other during excitation and returning to their natural position when unexcited. The need for a minimal air gap is another disadvantage of the SRM in that it requires higher manufacturing tolerances. There are disadvantages associated with the control of the SRM. For example, rotor position is needed ...
... other during excitation and returning to their natural position when unexcited. The need for a minimal air gap is another disadvantage of the SRM in that it requires higher manufacturing tolerances. There are disadvantages associated with the control of the SRM. For example, rotor position is needed ...
DETERMINATION OF EFFICIENCY (INDUCTION MACHINES)
... 1. The rated load temperature test (Clause 6.4.4.1) very carefully brings the motor to a stable temperature at under its most important load condition, namely full load. Subjecting the motor then to a series of overload conditions causes significant additional internal heating, and this procedure ha ...
... 1. The rated load temperature test (Clause 6.4.4.1) very carefully brings the motor to a stable temperature at under its most important load condition, namely full load. Subjecting the motor then to a series of overload conditions causes significant additional internal heating, and this procedure ha ...
Fast Switching Direct Torque Control Using a Single DC-link
... reliability, and the system cost increases with more sensors. Therefore, many efforts have been made to minimize the number of current sensors for electric drive systems. In [10]-[12], several current-sensorless control methods are presented. Although the cost of the drive systems is reduced signifi ...
... reliability, and the system cost increases with more sensors. Therefore, many efforts have been made to minimize the number of current sensors for electric drive systems. In [10]-[12], several current-sensorless control methods are presented. Although the cost of the drive systems is reduced signifi ...
Slip power recovery systems When are Wound rotor motors
... regenerative or feedback power converter is controlled to modulate the amount of power put back into the power system, allowing control of the motor speed. All the rotor energy previously lost as heat in the rheostat is now saved, and for large motors, this amounts to significant cost savings. ...
... regenerative or feedback power converter is controlled to modulate the amount of power put back into the power system, allowing control of the motor speed. All the rotor energy previously lost as heat in the rheostat is now saved, and for large motors, this amounts to significant cost savings. ...
Bistable Rotary Solenoid
... The mid position in which bistable solenoids are normally drawn is the nominal centre half-way position between two (stable equilibrium in de-energised state) end points. This position is defined in relation to a locating feature (typically a flat or keyway) on the shaft of the solenoid, and to moun ...
... The mid position in which bistable solenoids are normally drawn is the nominal centre half-way position between two (stable equilibrium in de-energised state) end points. This position is defined in relation to a locating feature (typically a flat or keyway) on the shaft of the solenoid, and to moun ...
SPEED CONTROL of SHUNT DC MOTOR
... • For motors operating between no-load & full-load conditions, an increase in RF may reliably be expected to increase operating speed ...
... • For motors operating between no-load & full-load conditions, an increase in RF may reliably be expected to increase operating speed ...
Motor Types
... permanent magnets, a stator with windings and commutation that is performed electronically. Typically three Hall sensors are used to detect the rotor position and commutation is performed based on Hall sensor inputs. The motor is driven by rectangular or trapezoidal voltage strokes coupled with the ...
... permanent magnets, a stator with windings and commutation that is performed electronically. Typically three Hall sensors are used to detect the rotor position and commutation is performed based on Hall sensor inputs. The motor is driven by rectangular or trapezoidal voltage strokes coupled with the ...
Analysis of power parameters of the squirrel cage motor and LSPMS
... used in the analysis of squirrel cage and LSPMS motors [4]. In order to represent the skew of the rotor slots, the machine was cut into w disks (sections) along the z-axis parallel to the shaft [1]. Each section concerns the different position of the rotor with respect to the stator. The magnetic co ...
... used in the analysis of squirrel cage and LSPMS motors [4]. In order to represent the skew of the rotor slots, the machine was cut into w disks (sections) along the z-axis parallel to the shaft [1]. Each section concerns the different position of the rotor with respect to the stator. The magnetic co ...
The New Venture 244 Gen II
... vehicle is driven in all-wheel drive all the time and on any road surface unless the driver selects one of the part-time ranges (4 Lock or 4 Low), which are suitable for only off-road use. You may get questions from owners who have not read their operator’s manual as to why the front wheels may be p ...
... vehicle is driven in all-wheel drive all the time and on any road surface unless the driver selects one of the part-time ranges (4 Lock or 4 Low), which are suitable for only off-road use. You may get questions from owners who have not read their operator’s manual as to why the front wheels may be p ...
Examples of Electric Drive Solutions and Applied
... CO2 emissions in the oil and gas field by utilizing energy-saving technologies for rotating machinery. In particular, switching existing steam turbine drive equipment to electric drive has achieved a significant reduction in CO2 emissions. Some implementation-related considerations apply when conver ...
... CO2 emissions in the oil and gas field by utilizing energy-saving technologies for rotating machinery. In particular, switching existing steam turbine drive equipment to electric drive has achieved a significant reduction in CO2 emissions. Some implementation-related considerations apply when conver ...
starting system
... Series-wound motors develop maximum torque at initial start-up. Torque decreases as motor speed increases. ...
... Series-wound motors develop maximum torque at initial start-up. Torque decreases as motor speed increases. ...
OPTIMAL EFFICIENCY BASED PREDICTIVE CONTROL OF
... used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at constant rated value and ignores the machine losses. Consequently, the efficiency of the motor is poor especially w ...
... used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at constant rated value and ignores the machine losses. Consequently, the efficiency of the motor is poor especially w ...
Basic Controls, 4-1 Friction Brakes
... motor in lifting appliances. They are also used to reduce motor stopping time and execute precise control. Friction brakes operate in a manner similar to automobile brakes. Braking is accomplished by friction surfaces (shoes or pads), which come in contact with a disk mounted on the motor shaft. A s ...
... motor in lifting appliances. They are also used to reduce motor stopping time and execute precise control. Friction brakes operate in a manner similar to automobile brakes. Braking is accomplished by friction surfaces (shoes or pads), which come in contact with a disk mounted on the motor shaft. A s ...
57KB - NZQA
... Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must enga ...
... Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must enga ...
Variable Frequency Drives 3-Phase Motor Control
... motor. Hence, synchronous speed control is maintained throughout the operating range. It must be noted that synchronous motors cost more than induction type and are only required in special applications. Slip Compensation Slip compensation is actually a sophisticated version of the open loop concept ...
... motor. Hence, synchronous speed control is maintained throughout the operating range. It must be noted that synchronous motors cost more than induction type and are only required in special applications. Slip Compensation Slip compensation is actually a sophisticated version of the open loop concept ...
Case study: Toyota Hybrid Synergy Drive
... engine between three forms: extra torque at the wheels (under constant rotation speed), extra rotation speed at the wheels (under constant torque), and electricity. This achieves the benefits of a continuously variable transmission, except that the torque/speed conversion uses electricity rather tha ...
... engine between three forms: extra torque at the wheels (under constant rotation speed), extra rotation speed at the wheels (under constant torque), and electricity. This achieves the benefits of a continuously variable transmission, except that the torque/speed conversion uses electricity rather tha ...
Dynamometer
.jpg?width=300)
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.