A 210V, 900rpm, 140 A separately excited do motor has an armature resistance of 0.070. It is fed from a single phase fully controlled rectifier with an ac source voltage of 235V, 60HZ. Assuming continuous conduction. Determine i) Back emf ii) Firing angle for rated motor torque and -600rpm iii) Motor speed for a = 150° and rated torque. iv) Firing angle for rated motor torque and 700rpm.

A 210V, 900rpm, 140 A separately excited do motor has an armature resistance of 0.070. It is fed from a single phase fully controlled rectifier with an ac source voltage of 235V, 60HZ. Assuming continuous conduction. Determine i) Back emf ii) Firing angle for rated motor torque and -600rpm iii) Motor speed for a = 150° and rated torque. iv) Firing angle for rated motor torque and 700rpm.

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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power electronics and drives