For a machine on a infinite bus active power can be varied by     changing of prime mover speed     both     changing the field excitation     None

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter32: Two-speed, One-winding (consequent Pole) Motor Controllers
Section: Chapter Questions
Problem 6SQ: Describe the operation of Figure 325 (B) by adding jumper wire A to the original circuit.
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Question 5

For a machine on a infinite bus active power can be varied by

   

changing of prime mover speed

   

both

   

changing the field excitation

   

None

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