A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 3 O 4.25 O 2.85

A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 3 O 4.25 O 2.85

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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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

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مطلوب
MCQS
A series motor runs at (800 r.p.m)
when the voltage is (400 V) and the
current is (25 A). The armature
resistance is (0.4 Q) and the series
field resistance is (0.2 Q). Determine
the resistance to be connected in
series to reduce the speed to (600
r.p.m) with same current
3.85
3
4.25
2.85
محو التحدید
Brushes for commutator are made of

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