A 210V, 1200 rpm, 10A separately. excited motor which is controlled by a single-phase fully controlled converter with an a.c. source voltage of 230V, 50 Hz. Assume that sufficient inductance is present in the armature circuit to make the motor current continuous and ripple- free for any torque greater than 25 percent of the rated torque Ra = 1.5 %3D (a) What should be the value of the firing angle to get the rated torque at 800 rpm? (b) Compute the firing angle for the rated braking torque at 1200 rpm. (c) Calculate the motor speed at the rated torque and a = 165° for the regenerative braking?

A 210V, 1200 rpm, 10A separately. excited motor which is controlled by a single-phase fully controlled converter with an a.c. source voltage of 230V, 50 Hz. Assume that sufficient inductance is present in the armature circuit to make the motor current continuous and ripple- free for any torque greater than 25 percent of the rated torque Ra = 1.5 %3D (a) What should be the value of the firing angle to get the rated torque at 800 rpm? (b) Compute the firing angle for the rated braking torque at 1200 rpm. (c) Calculate the motor speed at the rated torque and a = 165° for the regenerative braking?

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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