A 230 V, 20 Hp, 850 RPM, 73 A DC separately-excited DC Motor has an armature resistance of 0.176 Ohm and a sufficiently large inductance such that the motor armature current can be considered ripple-free when supplied by a full-wave fully-controlled three-phase rectifier. The AC power supply is Y-connected with a 110 V/ph and 60 Hz. When the firing angle is 120,The RMS value of the third-order harmonic of the supply line current is:

A 230 V, 20 Hp, 850 RPM, 73 A DC separately-excited DC Motor has an armature resistance of 0.176 Ohm and a sufficiently large inductance such that the motor armature current can be considered ripple-free when supplied by a full-wave fully-controlled three-phase rectifier. The AC power supply is Y-connected with a 110 V/ph and 60 Hz. When the firing angle is 120,The RMS value of the third-order harmonic of the supply line current is:

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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