A 100-hp, 500-V, 1000-rpm de series motor controls a load requiring a torque of T = 185 Nm at 900 rpm. The field circuit resistance is R; = 0.06 2, the armature circuit resistance is Ra = 0.02 2, and the voltage constant is Ky = 32 mV/A rad/s. The viscous friction and the no-load losses are negligible. The armature current is continuous and ripple free. b) Determine: i. the back emf Eg, ii. the required armature voltage Va,

A 100-hp, 500-V, 1000-rpm de series motor controls a load requiring a torque of T = 185 Nm at 900 rpm. The field circuit resistance is R; = 0.06 2, the armature circuit resistance is Ra = 0.02 2, and the voltage constant is Ky = 32 mV/A rad/s. The viscous friction and the no-load losses are negligible. The armature current is continuous and ripple free. b) Determine: i. the back emf Eg, ii. the required armature voltage Va,

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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Concept explainers

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.

Question

power electronics and drives

A 100-hp, 500-V, 1000-rpm de series motor controls a load requiring a torque of
TL = 185 Nm at 900 rpm. The field circuit resistance is R; = 0.06 2, the armature circuit
resistance is Ra = 0.02 2, and the voltage constant is Ky = 32 mV/A rad/s. The viscous friction
and the no-load losses are negligible. The armature current is continuous and ripple free.
b)
Determine:
i.
the back emf Eg,
ii.
the required armature voltage Va,

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