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 turns NSE= 10 turns 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, 52 A armature current, the rotational losses are 933 Watt. What is the efficiency of this motor? Select one: O a. % Efficiency = 74.5 % O b. % Efficiency = 84.4 % O c. None O d. % Efficiency = 94.2 % A 180-V, DC motor is connected as a cumulatively-compounded DC motor. Its characteristics are givenbelow:RA = 0.10 2Rs = 0.05 2RF = 125 2Radj = 100 2NF = 1000 turnsNSE = 10 turns IL, rated = 55 ANm=1800 RPMThis motor has compensating windings and interpoles.When the motor is rotating at 1680 RPM, 180 V supply, 52 A armature current, the rotational losses are933 Watt.What is the efficiency of this motor?Select one:O a. % Efficiency = 74.5 %O b. % Efficiency = 84.4 %O c. NoneO d. % Efficiency = 94.2 %

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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 turns NSE= 10 turns 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, 52 A armature current, the rotational losses are 933 Watt. What is the efficiency of this motor? Select one: O a. % Efficiency = 74.5 % O b. % Efficiency = 84.4 % O c. None O d. % Efficiency = 94.2 %

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