Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 27, Problem 2SQ
What is meant by an “open transition” from start to run? Why is this condition objectionable at times when used with large horsepower motors?
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Chapter 27 Solutions
Electric Motor Control
Ch. 27 - Why is it desirable to remove the autotransformers...Ch. 27 - What is meant by an open transition from start to...Ch. 27 - Which of the following applies to an...Ch. 27 - How are reduced voltages obtained from...Ch. 27 - Prob. 5SQCh. 27 - What is a disadvantage of starting with...Ch. 27 - What is one advantage of using an autotransformer...
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- Where is the best place to look to find specific information about a motor, such as horsepower, voltage, full-load current, service factor, and full-load speed?arrow_forwardFor what purpose is the short circuit test performed in asynchronous motor? Please explain.arrow_forwardIn an asynchronous motor, why does the motor slip value increase as the torque value increases? (explain verbally)arrow_forward
- Solve on keyboard clear and correct answer or will dislike In Induction motor, the load test has done. The result get is like the table below.1) Explain why the speed(rpm) is increase when voltage is increase?2) Explain why when the voltage reach in maximum the speed(rpm) is decrease?Answer all questions by explaination. Solve on keyboard clear and correct answer or will dislikearrow_forward1-) a) Does the slip increase as the load increases in an asynchronous motor? Explain what is the reason for this. b) What does it mean when the slip is 0, 1, -1 in asynchronous motor, how is it achieved? Explain.arrow_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
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