Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 58, Problem 6SQ
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Explain about modern motor control center.
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6.a. When you're taking a PM motor apart you should exercise special care not to damage theA. end bells.B. commutator.C. permanent magnets.D. brush holders.6.b. A PM field servo motor may be equipped with a resolver that is used toA. excite the armature windings.B. create a voltage that increases with velocity.C. prevent the brushes from sparking.D. feed back position information.
Why do you think some motor control circuit utilizes single voltage sources for control and power circuit? Explain.
1- Why the counter emf cancels part of the armature voltage?
2- What is the principle of DC motor operation?
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Electric Motor Control
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- What is the work of the Automatic transmission control system?arrow_forwardWhat are the two basic functions of synchronous motor control?arrow_forwardQ/ When a series dc motor is operated without a load, which of the following conditions occurs? * Ans 1- The armature draws excessive current 2- The armature speeds out of control 3- The armature will not turn 4-The voltage requirement increasesarrow_forward
- Rotor eccentricity can be caused by A. high motor loads.B. excessive voltage.C. poor motor mounting. D. loose stator coils.arrow_forwardWhat is the function of the field loss relay?arrow_forward2. Draw the schematic diagram of a six point Drum Switches that operate the long shunt compound dc motor in reverse –forward operation. Connect all the parts into the Drum Switch terminals only not in the outside of the Drum Switches. Explain your connection.arrow_forward
- Simulate in tinkercad. Create a program that controls the direction of rotation of a DC motor. Use a button switch to toggle between the forward and reverse rotation of the DC motor.arrow_forwardDoes the excitation circuit current change as the D.C shunt motor current changes? explain the reasons.arrow_forwardQ2] What is the Ward-Leonard motor control system? What are its advantages and disadvantages?arrow_forward
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