Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 50, Problem 6SQ
To determine
Explain the necessity to reverse the polarity of the series field of a compound motor if it is used in the dynamic braking circuit.
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Electric Motor Control
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- If the motor fails to achieve synchronous operation, what action is necessary?arrow_forwardIn plugging type of braking system of DC motor, the current in the series and shunt fields must not be reversed" True Falsearrow_forwardSeven and one-helf percent of a group of 640 motors are found to be overloaded. How Many are not overloaded?arrow_forward
- The factor that enables the synchronous motor to operate at different electrical load characteristics Please explain.arrow_forward17.a. When the speed of a machine is the same as that of the driving motor, the easiest method of connectingthe machine and the motor is withA. chains.B. coupling.C. belts.D. gears.17.b. Regenerative braking is used on induction motors toA. decrease the speed below synchronous speed.B. decrease the actual speed to the value of synchronous speed.C. increase the speed above synchronous speedD. increase the actual speed to the value of synchronous speedarrow_forwardExplain how you can adjust the speed of the asynchronous motor to different values, provided that the asynchronous motor driver keeps the sliding value constant.arrow_forward
- In an asynchronous motor, why does the motor slip value increase as the torque value increases? (explain verbally)arrow_forwardExplain why volatge is decreased for resistive and inductive loading for a synchronous motor?arrow_forwardThe tag speed of the three-phase, 50 Hz ring asynchronous motor is 896 rpm and the number of stator grooves is 36. With the number of coils being 10, the stator without scissors given in the question are classified as frames.arrow_forward
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