A d.c. In a brake test of a shunt motor, the following observations were taken: Spring balance reading = tight side 30.5 kg. Slack side 5.6 kg Effective diameter of brake drum D = 0.3 m Motor speed 960 rpm Supply voltage 230 V Input line current 18 A Find the motor horse power output and efficiency.

A d.c. In a brake test of a shunt motor, the following observations were taken: Spring balance reading = tight side 30.5 kg. Slack side 5.6 kg Effective diameter of brake drum D = 0.3 m Motor speed 960 rpm Supply voltage 230 V Input line current 18 A Find the motor horse power output and efficiency.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 19RQ: A motor is operating a load that requires a torque of 750 lb-in. and is turning at a speed of 1575...

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