Answered: 25. Which of the following is/are a…

25. Which of the following is/are a general method of starting squirrel-cage motors? a) full voltage starting b) reduced voltage starting c) both "a" and "b" d) neither "a" nor "b"

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter43: About Dc Motors

Section: Chapter Questions

Problem 1SQ

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Concept explainers

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

25.
Which of the following is/are a general method of starting squirrel-cage motors'?
a) full voltage starting
b) reduced voltage starting
c) both "a" and "b"
d) neither "a" nor "b"

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(3-) Draw the electrical equivalent circuits for DC shunt motor and DC serial motor carefully and as readable with the names of circuit elements written on the figures by writing the names of figures below them.