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Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

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BuyFindarrow_forward

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 33, Problem 7SQ
Textbook Problem
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Why are different motor connections shown for what appears to be the same motor in the various diagrams in Figure 33–2?

Chapter 33, Problem 7SQ, Why are different motor connections shown for what appears to be the same motor in the various

FIG. 33–2 Typical arrangements for four-speed, three-phase, two-winding motors.

To determine

What is the main aim of Figure 33-2 that is shown with different motor connections for the same motor.

Explanation of Solution

Refer to Figure 33-2 in the Textbook which illustrates the different motor connections of a common four-speed, three-phase, and two-winding motor at different speeds. An idle winding is shown as open circuited in all of the diagrams.

The main aim of the various diagrams shown in Figure 33-2 is the same motor operating at different speeds. The motor speed can be controlled by the number of poles in the stator and supply frequency. Commonly, the supply frequency is a constant variable...

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