Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 57, Problem 6SQ
To determine
Explain the process that takes place when the motor is reversed by reversing the generator polarity.
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Electric Motor Control
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- What is the effect of changing the speed of one of the generators?arrow_forwardIn a single phase motor what happens if power is lost to your unit while it was operating? When power is restored what will happen?arrow_forwardwhat happened to the DC motor if it runs without any starter? Explain with diagramarrow_forward
- When a stepping motor is connected to AC power, how many phases must be applied to the motor?arrow_forwardCan I use the Manual Motor Starter on a single phase motor? Why?arrow_forwardQuestion 1: Why is the voltage decresed at no-load operation? What is that voltage called? Question 2: Does the voltage increase with the increasing load? Why? Question 3: In which position the voltage decreased with the increasing load? Explain the reason. Question 4: Does the voltage change when a parallel rheostat is connected to the series excitation windings? Explain the reason. Question 5: Sketch the loading curve of the series generator depending on the values recorded.arrow_forward
- you are working as a plant electrician. you are told that a large DC motor was returned from the rewind shop and was installed on the previous shift. the motor seemed to operate properly until load was added, the motor then stopped, reversed direction, and began to run at a high speed. what is the probable cause of the trouble, and what would you do to correct the problem?arrow_forwardSquirrel-cage asynchronous motor, which has never been used before, as a generator in its first use will be run. Does the machine work as a generator? Explain.arrow_forwardis the DC motor in figure 1 turning in the same direction as that in figure 3 ? a- yes b- noarrow_forward
- What might be a hazard if a motor is started in the wrong direction?arrow_forwardDifferentiate a “Generator” from a “Motor” in terms of principle of operation. please answer clearly and readable. Thank you.arrow_forwardA shunt generator has 284 Volts. When field current increased greater than rated current what will be the excitation voltage of the Generator?arrow_forward
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