A series motor having an armature resistance of 0.1Ω and a field resistance of 0.15Ω, takes 48A at 230V and 720 rpm. The total core and friction losses are 650W. Neglecting stray-load and brush contact losses, the load of the motor is reduced so that the motor now takes 32A. Find the motor speed. 1100rpm 1235rpm 700rpm 600rpm
A series motor having an armature resistance of 0.1Ω and a field resistance of 0.15Ω, takes 48A at 230V and 720 rpm. The total core and friction losses are 650W. Neglecting stray-load and brush contact losses, the load of the motor is reduced so that the motor now takes 32A. Find the motor speed. 1100rpm 1235rpm 700rpm 600rpm
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 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...
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A series motor having an armature resistance of 0.1Ω and a field resistance of 0.15Ω, takes 48A at 230V and 720 rpm. The total core and friction losses are 650W. Neglecting stray-load and brush contact losses, the load of the motor is reduced so that the motor now takes 32A. Find the motor speed.
1100rpm
1235rpm
700rpm
600rpm
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