3 phase motors are widely used in the industry. they require little maintenance, having no brush gear or centrifugal switch, are robust and relatively inexpensive.

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter39: Synchronous Motor Operation
Section: Chapter Questions
Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...
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3 phase motors are widely used in the industry. they require little maintenance, having no brush gear or centrifugal switch, are robust and relatively inexpensive.

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