laRyA E.LoadInterpoleSeriesFigure 2(b) Stabilized DC shunt motora) Determine the armature current when operating at rated condition (assume no Rx in thecircuit).b) An external resistor, Rx has been inserted in series with shunt field winding. This resultsin the speed operated at 125% of rated speed and armature current becomes 115% ofrated current. Determine the value and power rating of Rx. [Compensated DC machine]A 240V, 50hp, 1200rpm stabilized shunt motor, operating at rated conditions, has an efficiencyat rated load of 90%. Interpole and series winding was installed on armarture winding toovercome armature reaction effect. The series field mmf is designed to be approximately equaland opposite to the equivalent demagnetizing mmf of armarture reaction.The motor parameters are:-Rinterpote = 0.02NNg = 10Rseries = 0.012N = 1231R. = 0.070Rf = 99.50The magnetization curve and circuit diagram are shown in Figure 2(a) and 2(b).Magnetization curve1.00.80.60.40.20.0123567Magnetomotive Force (mmf) [ A-t/pole x1000)Figure 2(a) Magnetizing curve of compensated DC machineFlux Density (B) [T]

Given A 240V, 50hp, 1200rpm stabilized shunt motor, operating at rated conditions, has an efficiency…

R. 4 la Load Ea Interpole Series Figure 2(b) Stabilized DC shunt motor a) Determine the armature current when operating at rated condition (assume no Rx in the circuit). b) An external resistor, Rx has been inserted in series with shunt field winding. This results in the speed operated at 125% of rated speed and armature current becomes 115% of rated current. Determine the value and power rating of Rx.

R. 4 la Load Ea Interpole Series Figure 2(b) Stabilized DC shunt motor a) Determine the armature current when operating at rated condition (assume no Rx in the circuit). b) An external resistor, Rx has been inserted in series with shunt field winding. This results in the speed operated at 125% of rated speed and armature current becomes 115% of rated current. Determine the value and power rating of Rx.

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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