ELECTRICITY FOR TRADES (LOOSELEAF)
3rd Edition
ISBN: 9781260437454
Author: Petruzella
Publisher: MCG
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Chapter 24.1, Problem 2RQ
To determine
Obtain the synchronous speed of the 6-ploe AC motor with 60 Hz supply.
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The back emf of a dc motor
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
A small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor draws 4.0 A, and when the armature is clamped so that it cannot turn, the motor draws 24 A. What is the back emf when the motor is operating normally?
Chapter 24 Solutions
ELECTRICITY FOR TRADES (LOOSELEAF)
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