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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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BuyFindarrow_forward

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 35, Problem 6SQ
Textbook Problem
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Acceleration resistors cannot be used for continuous duty. Why is this true and what may happen if an attempt is made to use them for continuous duty?

To determine

Explain the reason for the acceleration resistors cannot be used for continuous duty and also what happens if it is used for continuous duty.

Explanation of Solution

Refer to Figure 35-1 in the textbook that shows the push-button speed selection for a wound rotor motor. When the low-speed or medium-speed push-button is pressed, the motor runs along with the acceleration resistors connected in the rotor connection scheme.

When the motor operates with the acceleration resistors for continuous duty, the resistors will get overheat and even the resistors can also burn out...

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