A 15 kW, 250V shunt motor with Ra=0.22 Ω, Rf=170 Ω. At no-load and rated voltage, the speed is 1200 rpm and the armature current is 3 A. At full- load and rated voltage, the line current is 55A. What is the full-load speed?
A 15 kW, 250V shunt motor with Ra=0.22 Ω, Rf=170 Ω. At no-load and rated voltage, the speed is 1200 rpm and the armature current is 3 A. At full- load and rated voltage, the line current is 55A. What is the full-load speed?
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 6RQ: Name three factors that determine the torque produced by an induction motor.
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A 15 kW, 250V shunt motor with Ra=0.22 Ω, Rf=170 Ω. At no-load and
rated voltage, the speed is 1200 rpm and the armature current is 3 A. At full-
load and rated voltage, the line current is 55A. What is the full-load speed?
aswer: full load speed = 1146.5 rpm
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