Answered: Advance Motor Control 1. Why are…

Advance Motor Control 1. Why are contacts often disconnected in series when controlling small motors 2. Why are clapper type contactors generally used to control DC device

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter10: Contactors, Relays, And Overloads

Section: Chapter Questions

Problem 32RQ

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Concept explainers

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.

Question

Advance Motor Control

1. Why are contacts often disconnected in series when controlling small motors

2. Why are clapper type contactors generally used to control DC device

3. What is the purpose of FCR (field current relay)

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