Answered: 1. The operation of Commutator in DC…

1. The operation of Commutator in DC Motor is O a) to convert dc to ac O b) to convert ac to dc O c) to convert fixed dc to variable dc

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter51: Electric And Electronic Braking

Section: Chapter Questions

Problem 2SQ: Differentiate between the AC and DC magnetic fields applied to an induction motor stator.

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Concept explainers

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.

Question

1. The operation of Commutator in DC Motor is *
O a) to convert dc to ac
O b) to convert ac to dc
O c) to convert fixed dc to variable dc
O reverse the current direction in the rotating windings each half turn

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