Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 56, Problem 5SQ
Textbook Problem

How is the magnetic drive used as an adjustable speed drive?

To determine

Explain how the magnetic drive is used as an adjustable speed drive.

Explanation of Solution


Magnetic drive is a device that is used to couple the load to the motor magnetically. It is used with transducer based on the requirement. The transducer or actuating device converts the physical activity in terms of electrical signal.

The magnetic drive is used to control the field excitation in the feedback speed control method of tachometer generator. In other words, the magnetic drive adjusts the field excitation manually or remotely with the rheostat. The adjustment of field excitation controls the speed of the motor...

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