i) The field of separately excited DC Motor is excited by a separate single phase voltage source of 240V-RMS at 60HZ and single phase full wave uncontrolled rectifier, whereas the armature is connected to a single phase voltage source of 230V-RMS at 50HZ through a single phase full wave controlled rectifier. Name plate details of the motor shows Ra = 0.14 O, Rf = 3500, Motor constant K = 1.35 VIA-rad/sec. The motor is taking a rated armature current of 8A, and the Motor takes a 6% of the full load current under no load. Calculate the following. а. What happens to the speed of the Motor if the armature converter is fired at lower firing angles? b. Torque produced by the motor under 0.75 % of the full load. с. Calculate the speed of the Drive system, when the armature converter is fired with a firing angle of 130°. d. Calculate the firing angle of the armature converter to run the motor at 1460 RPM, under at its 60% of full load.

i) The field of separately excited DC Motor is excited by a separate single phase voltage source of 240V-RMS at 60HZ and single phase full wave uncontrolled rectifier, whereas the armature is connected to a single phase voltage source of 230V-RMS at 50HZ through a single phase full wave controlled rectifier. Name plate details of the motor shows Ra = 0.14 O, Rf = 3500, Motor constant K = 1.35 VIA-rad/sec. The motor is taking a rated armature current of 8A, and the Motor takes a 6% of the full load current under no load. Calculate the following. а. What happens to the speed of the Motor if the armature converter is fired at lower firing angles? b. Torque produced by the motor under 0.75 % of the full load. с. Calculate the speed of the Drive system, when the armature converter is fired with a firing angle of 130°. d. Calculate the firing angle of the armature converter to run the motor at 1460 RPM, under at its 60% of full load.

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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