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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 43, Problem 5SQ
Textbook Problem
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Why is it common practice to leave power connected to the shunt field even when the motor is not operating?

To determine

Explain the reasons for connecting the power to the shunt field even when the motor is not operating.

Explanation of Solution

DC motor with a shunt field circuit has the parallel connection of armature and field winding. Hence, if the current passes through the shunt field decreases, it will increase the speed of motor severely due to the reduction of the net magnetic flux.

Refer to Figure 43-9 in the textbook, the shunt field circuit is connected with the separate power supply...

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