18. When field voltage is controlled to provide a method of variable speed control, the system is using aconcept known as fieldA. drive.B. stability.C. bias.D. weakening.

Answered: 18. When field voltage is controlled to…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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18. When field voltage is controlled to provide a method of variable speed control, the system is using a
concept known as field
A. drive.
B. stability.
C. bias.
D. weakening.

Expert Solution

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The magnetic field of the motor and the electric current flowing through a wire winding combine to produce force in the form of torque on the motor shaft in the majority of electric motors. Physically, an electric generator is identical to an electric motor; however, it uses a reversed power flow to transform mechanical energy into electrical energy. Batteries or rectifiers are examples of direct current or alternating current sources that can power electric motors.

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