AN-828 Increasing the High Speed Torque of
... constants by four and allows the rated supply voltage to be increased by a factor of four. Both the crispness of the response and the high speed torque are increased. While the rotor holds position or moves at low step rates, the series power resistors protect the motor by holding the winding curren ...
... constants by four and allows the rated supply voltage to be increased by a factor of four. Both the crispness of the response and the high speed torque are increased. While the rotor holds position or moves at low step rates, the series power resistors protect the motor by holding the winding curren ...
Design and Implementation of a Hybrid Electric Bike
... decreases. This was more critical to our system, than minimizing the number of parts. Compared to other drive options, however, the two stage design is much more efficient, e.g. friction roller based approach. The advantages of a friction roller approach are its easy implementation, and high torque ...
... decreases. This was more critical to our system, than minimizing the number of parts. Compared to other drive options, however, the two stage design is much more efficient, e.g. friction roller based approach. The advantages of a friction roller approach are its easy implementation, and high torque ...
EMT 113 Chapter 2
... - STATOR : provides mechanical support for the machine, consists poles and yoke - ROTOR / ARMATURE : the rotating part, shrouded by fixed poles on the stator -COMMUTATOR : mechanical rectifier, which changes the AC voltage of the rotating conductors to DC voltage - BRUSHES : conduct the current from ...
... - STATOR : provides mechanical support for the machine, consists poles and yoke - ROTOR / ARMATURE : the rotating part, shrouded by fixed poles on the stator -COMMUTATOR : mechanical rectifier, which changes the AC voltage of the rotating conductors to DC voltage - BRUSHES : conduct the current from ...
and 2 - Faculty of Engineering
... than the primary voltage by 10, and therefore the transformer is called a step-down transformer. The purpose of this experiment is to study the behavior and circuit model of single-phase transformer as reflected by its internal parameters Running a transformer at no-load, yields a very small voltage ...
... than the primary voltage by 10, and therefore the transformer is called a step-down transformer. The purpose of this experiment is to study the behavior and circuit model of single-phase transformer as reflected by its internal parameters Running a transformer at no-load, yields a very small voltage ...
attachment=3734
... As the speed of operation is low for hydro turbines use din Hydro-electric plants, salient pole type Synchronous generators are used. These allow better ventilation and also have other advantages over smooth cylindrical type rotor. 25. Why almost all large size Synchronous machines are constructed w ...
... As the speed of operation is low for hydro turbines use din Hydro-electric plants, salient pole type Synchronous generators are used. These allow better ventilation and also have other advantages over smooth cylindrical type rotor. 25. Why almost all large size Synchronous machines are constructed w ...
MV6404
... Induction type energy meters- megger (Basic construction & principles of operation only)– Single phase and three phase wattmeter for power measurement – Measurement of energy, speed, frequency and phase difference – Measurement of resistance, inductance and capacitance by Bridge method – Magnetic me ...
... Induction type energy meters- megger (Basic construction & principles of operation only)– Single phase and three phase wattmeter for power measurement – Measurement of energy, speed, frequency and phase difference – Measurement of resistance, inductance and capacitance by Bridge method – Magnetic me ...
Unit-2 EMI
... (ii) Controlling torque (By Spring or gravity)- It is opposing the deflecting torque and increases with deflection. It is produced by either ...
... (ii) Controlling torque (By Spring or gravity)- It is opposing the deflecting torque and increases with deflection. It is produced by either ...
electrical engineering technology emt 113/4
... - STATOR : provides mechanical support for the machine, consists poles and yoke - ROTOR / ARMATURE : the rotating part, shrouded by fixed poles on the stator -COMMUTATOR : mechanical rectifier, which changes the AC voltage of the rotating conductors to DC voltage - BRUSHES : conduct the current from ...
... - STATOR : provides mechanical support for the machine, consists poles and yoke - ROTOR / ARMATURE : the rotating part, shrouded by fixed poles on the stator -COMMUTATOR : mechanical rectifier, which changes the AC voltage of the rotating conductors to DC voltage - BRUSHES : conduct the current from ...
section 262923 - variable-frequency motor
... Used with Adjustable-Voltage or Adjustable-Frequency Controls or Both." Units suitable for operation of inverter-duty motors as defined by NEMA MG 1, Section IV, Part 31, "Definite-Purpose Inverter-Fed Polyphase Motors." Listed and labeled for integrated short-circuit current (withstand) rating by a ...
... Used with Adjustable-Voltage or Adjustable-Frequency Controls or Both." Units suitable for operation of inverter-duty motors as defined by NEMA MG 1, Section IV, Part 31, "Definite-Purpose Inverter-Fed Polyphase Motors." Listed and labeled for integrated short-circuit current (withstand) rating by a ...
direct torque control of permanent magnet synchronous motor based
... linkage can be approximately determined by the integration of the voltage vector. This implies the stator flux linkage moves in the same direction as the given voltage vector. Therefore, it is possible to control the amplitude, moving direction and speed of the stator flux linkage by selecting a pro ...
... linkage can be approximately determined by the integration of the voltage vector. This implies the stator flux linkage moves in the same direction as the given voltage vector. Therefore, it is possible to control the amplitude, moving direction and speed of the stator flux linkage by selecting a pro ...
TEMP EFFECTS full paper Jan3.indd
... motor from no-load to locked rotor (stall) using a fixed terminal voltage from a power supply with low output impedance. A test like this is done in order to get a “baseline” measure of motor performance while the motor is at room temperature. Motor shaft speed and current are plotted as a function ...
... motor from no-load to locked rotor (stall) using a fixed terminal voltage from a power supply with low output impedance. A test like this is done in order to get a “baseline” measure of motor performance while the motor is at room temperature. Motor shaft speed and current are plotted as a function ...
MN770 Evelator Application Guide
... control. For existing DC elevators, a DC motor generator set is replaced by a DC SCR control. The existing DC motor must be modified to accept an encoder or tachometer feedback device. ...
... control. For existing DC elevators, a DC motor generator set is replaced by a DC SCR control. The existing DC motor must be modified to accept an encoder or tachometer feedback device. ...
Dynamic Testing of Permanent Magnet Synchronous Machines
... This thesis presents a method to test and characterize Permanent Magnet Synchronous Machines (PMSMs) called the Dynamic Test Method (DTM). In contrast to traditional methods, the DTM tests machines without a brake or a locking mechanism for the test object's rotor. Instead, the moment of inertia of ...
... This thesis presents a method to test and characterize Permanent Magnet Synchronous Machines (PMSMs) called the Dynamic Test Method (DTM). In contrast to traditional methods, the DTM tests machines without a brake or a locking mechanism for the test object's rotor. Instead, the moment of inertia of ...
Design of Direct Torque Controller of Induction Motor (DTC)
... In general, induction motor can be controlled by both open and closed loop control techniques. These are also known as scalar and vector control (VC) schemes. VC aims to control the rotor flux and torque of the motor by estimating the speed and voltage. This estimation can be either directly done th ...
... In general, induction motor can be controlled by both open and closed loop control techniques. These are also known as scalar and vector control (VC) schemes. VC aims to control the rotor flux and torque of the motor by estimating the speed and voltage. This estimation can be either directly done th ...
ITtestPapers.com
... TECHNICAL PAPER-40 QUESTION, 45- MINUTES (1)in a ckt. We r giving voltage of 50 Hz as well as 60. then what will be the resultant frequency. (a)less than 50 (b)more than 60(c)in between 50 & 60 (d)none..........according to our conclusion answer will be none because if we apply two frequency compone ...
... TECHNICAL PAPER-40 QUESTION, 45- MINUTES (1)in a ckt. We r giving voltage of 50 Hz as well as 60. then what will be the resultant frequency. (a)less than 50 (b)more than 60(c)in between 50 & 60 (d)none..........according to our conclusion answer will be none because if we apply two frequency compone ...
FBLⅡ Series OPERATING MANUAL
... ⑤ SLOW DOWN (deceleration input) Input terminal for decelerating the motor to a stop. This terminal is not used for acceleration, which is set by using the built-in acceleration time potentiometer. ⑥ N.C. Not used. ⑦ H, ⑧ M, ⑨ L (speed control input) These are the connection terminals when controlli ...
... ⑤ SLOW DOWN (deceleration input) Input terminal for decelerating the motor to a stop. This terminal is not used for acceleration, which is set by using the built-in acceleration time potentiometer. ⑥ N.C. Not used. ⑦ H, ⑧ M, ⑨ L (speed control input) These are the connection terminals when controlli ...
... enclosures allowance must be made for dissipation of heat generated while the motor is running. This can require use of cooling fans or bypass contactors – but not with the ASAB soft starter. Built-in bypass means ASAB soft starters dissipate very little heat when running and eliminate the costly re ...
Dual Winding Method of a BLDC Motor for Large Starting Torque
... A BRUSHLESS dc (BLDC) motor has been widely used in the driving source of many precision electromechanical devices not only because it has high efficiency but also because it has good controllability. [1]. The linear torque–speed characteristics of a BLDC motor make it easy to control its speed over ...
... A BRUSHLESS dc (BLDC) motor has been widely used in the driving source of many precision electromechanical devices not only because it has high efficiency but also because it has good controllability. [1]. The linear torque–speed characteristics of a BLDC motor make it easy to control its speed over ...
IV. Basic concept of a torque estimation
... and rolling mills, container loading/unloading cranes, power plants, engineering workshops, etc. In the beginning, the control of these drives was mainly focused on the rotor motor side using speed based rotor contactor switching for discontinuous additional external rotor resistor change. Thanks to ...
... and rolling mills, container loading/unloading cranes, power plants, engineering workshops, etc. In the beginning, the control of these drives was mainly focused on the rotor motor side using speed based rotor contactor switching for discontinuous additional external rotor resistor change. Thanks to ...
UNIT – VI UNIT-6: SPECIAL MACHINES Explain the constructional
... producing it as shown in figure. • When Φs acts in upward direction, the conductors on left experience force from left to right, while conductors on right experience force from right to left. • Hence overall force, torque is zero. Rotor is stationary. Condition for rotation • We know that there must ...
... producing it as shown in figure. • When Φs acts in upward direction, the conductors on left experience force from left to right, while conductors on right experience force from right to left. • Hence overall force, torque is zero. Rotor is stationary. Condition for rotation • We know that there must ...
Step Motors
... The switches shown in Fig.2 are essential for energising the coils of the step motor. In present day applications, semiconductor switches are universally employed fro this purpose. A typical transistor switch arrangement is shown in Fig.6(a). A positive going pulse will turn on the transistor and en ...
... The switches shown in Fig.2 are essential for energising the coils of the step motor. In present day applications, semiconductor switches are universally employed fro this purpose. A typical transistor switch arrangement is shown in Fig.6(a). A positive going pulse will turn on the transistor and en ...
link
... converter is current- controlled, so that applied voltages are such as to minimize the errors in the current tracking Until the early 1980s of the last century, the separately excited dc motor was the only available elec- tric machine that could be used in a high-performance drive A dc motor is by v ...
... converter is current- controlled, so that applied voltages are such as to minimize the errors in the current tracking Until the early 1980s of the last century, the separately excited dc motor was the only available elec- tric machine that could be used in a high-performance drive A dc motor is by v ...
What is a Load Bank? Portable Load Bank
... unitized, systematic device which includes both load elements with control and accessory devices required for operation. Where the “real” load is served by the power source and uses the energy output of the source for some productive purpose, the load bank serves the power source, using its energy o ...
... unitized, systematic device which includes both load elements with control and accessory devices required for operation. Where the “real” load is served by the power source and uses the energy output of the source for some productive purpose, the load bank serves the power source, using its energy o ...
PTC305C Series PTC Thermistors Motor Start Packages
... THESE DEVICES ARE INTENDED FOR APPLICATION ON 240 VOLT LINES OR SYSTEMS WITH MAXIMUM LINE VOLTAGE UP TO 265 V. The PTC305C20, 21 and 22 are also used on 120 V systems where the motor is designed to use same run capacitor and PTC as equivalent 230 V compressor. ...
... THESE DEVICES ARE INTENDED FOR APPLICATION ON 240 VOLT LINES OR SYSTEMS WITH MAXIMUM LINE VOLTAGE UP TO 265 V. The PTC305C20, 21 and 22 are also used on 120 V systems where the motor is designed to use same run capacitor and PTC as equivalent 230 V compressor. ...
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.