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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 45, Problem 1SQ
Textbook Problem
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Why may small DC motors be started directly across the line?

To determine

Explain why small DC motors can be connected directly across the line for starting.

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

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