Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 36, Problem 8SQ
If there is a locked rotor in the secondary circuit, what will be the value of the frequency?
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What are the following statements are true for a three-phase induction motor?
I. Three-phase induction motor stator winding is fed from a single-phase supply
II. Stator carries a three-phase winding
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a.
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b.
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c.
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Chapter 36 Solutions
Electric Motor Control
Ch. 36 - Are the secondary resistors connected in three...Ch. 36 - Do secondary resistors on starters with three or...Ch. 36 - Does reversing the secondary rotor leads mean that...Ch. 36 - If one of the secondary resistor contacts (S2)...Ch. 36 - In Figure 362, how many different interlocking...Ch. 36 - Referring to Figure 364, why is it not possible to...Ch. 36 - Prob. 7SQCh. 36 - If there is a locked rotor in the secondary...Ch. 36 - Why is it necessary to remove the jumpers in...Ch. 36 - Prob. 10SQ
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- LA 6-pole, 50 Hz single-phase inductor motor runs at a speed of 950 rpm. The frequency / frequencies of current in the cage rotor will be 5 Hz a) c) 5 Hz, 95 Hz b) 5 Hz, 55 Hz d) 55 Hz, 95 Hzarrow_forwardpls help mearrow_forwardThe supply frequency is 50 Hz. What will be the rotor voltage frequency if the motor speed is equal to 90% of .synchronous speed .Hz 450 .Hz 100 .Hz 50 .None Oarrow_forward
- uestions 1. After the Time/Div controls were set to view three cycles of calibration waveform, what happened to the number of cycles seen when the sweep speed was increased? Decreásed? Why? Hveform affected when the sweeparrow_forwardPlease solve this question in control system quicklyarrow_forwardThe frequency of rotor current in an induction motor is slip times the frequency of stator current. slip times the frequency of supply, One by slip times the frequency of stator current. One by slip times the frequency of supplyarrow_forward
- which of the following is sometimes referred to as the motor secondary of a 3 phase induction motor ? a- stator b- rotor c- both a and b d- neitherarrow_forwardCompare between the split phase motor and capacitor start motor and permanent capacitor motor and capacitor start capacitor run motorarrow_forwardWhat is the frequency of rotor current of a 50 Hz induction motor operating at 2% slip?arrow_forward
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