Conventional electric drive was introduced in 1891 by Hary Ward Leonard (1861-1915), anelectrical engineer based in Cincinnati to drive passenger lift of large mines in the US. It hasbeen the major drive for DC motor application throughout the century. However, modemelectric drive has replaced the usage of the Ward-Leonard system in many industrialapplications nowadays.(a) A 100hp, 250V, 1200 rpm separately excited DC motor with amature resistance of0.032 and a field resistance of 41.572 initially nuns with VA-250V, Ia=120V androtates at 1103 rpm while supplying a constant torque load. If the motor is required toslow down to 879 rpm with the same load, what would be the firing angle at the 3-phase240VAC RMS firing circuit connected to the amature circuit of the DC motor?

Given information about a separately excited DC motor: Initially running with VA=250 Volts and…

Conventional electric drive was introduced in 1891 by Hary Ward Leonard (1861-1915), an electrical engineer based in Cincinnati to drive passenger lift of large mines in the US. It has been the major drive for DC motor application throughout the century. However, modem electric drive has replaced the usage of the Ward-Leonard system in many industrial applications nowadays. (a) A 100hp. 250V, 1200 pm separately excited DC motor with amature resistance of 0.032 and a field resistance of 41.572 initially runs with Va=250V, L=120V and rotates at 1103 rpm while supplying a constant torque load. If the motor is required to slow down to 879 rpm with the same load, what would be the firing angle at the 3-phase 240VAC RMS firing circuit connected to the amature circuit of the DC motor?

Conventional electric drive was introduced in 1891 by Hary Ward Leonard (1861-1915), an electrical engineer based in Cincinnati to drive passenger lift of large mines in the US. It has been the major drive for DC motor application throughout the century. However, modem electric drive has replaced the usage of the Ward-Leonard system in many industrial applications nowadays. (a) A 100hp. 250V, 1200 pm separately excited DC motor with amature resistance of 0.032 and a field resistance of 41.572 initially runs with Va=250V, L=120V and rotates at 1103 rpm while supplying a constant torque load. If the motor is required to slow down to 879 rpm with the same load, what would be the firing angle at the 3-phase 240VAC RMS firing circuit connected to the amature circuit of the DC motor?

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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