A 180-V, DC motor is connected as a cumulatively-compounded DC motor. Its characteristics are given below: RA = 0.10 2 Rs 0.05 2 RF = 125 2 Radj = 100 2 NF 1000 tums NSE = 10 turms IL, rated 55 A nm= 1800 RPM This motor has compensating windings and interpoles. When the motor is rotating at 1680 RPM, 180 V supply, 54A armature current, the rotational losses are 1026 Watt. What is the efficiency of this motor? Select one: a. % Efficiency = 94.2 % O b. None C. % Efficiency = 74.5 % O d. % Efficiency 83.7 %

A 180-V, DC motor is connected as a cumulatively-compounded DC motor. Its characteristics are given below: RA = 0.10 2 Rs 0.05 2 RF = 125 2 Radj = 100 2 NF 1000 tums NSE = 10 turms IL, rated 55 A nm= 1800 RPM This motor has compensating windings and interpoles. When the motor is rotating at 1680 RPM, 180 V supply, 54A armature current, the rotational losses are 1026 Watt. What is the efficiency of this motor? Select one: a. % Efficiency = 94.2 % O b. None C. % Efficiency = 74.5 % O d. % Efficiency 83.7 %

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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