A three-phase 3.7 kW/5 hp, 1420 rpm, delta connected squirrel cage induction motor is used to drive a constant power load. It has its per-phase equivalent circuit parameters referred to stator: R1=5.392, R2=5.722, X, =X2=8.222, Rm=20002, and Xm=192 2 at rated voltage and frequency of 415 V, 50 Hz. At 360 V, 50 Hz, it has Rm=2100 2 and Xm=2402. Calculate its (a) supply current, (b) losses, and (c) input power at rated speed and voltage. Calculate its (d) supply current, (e) losses, and (f) input power at rated speed and 360 V, 50 Hz. For constant output power, consider new slip=rated slipx (Vrated VNew) approximation,
A three-phase 3.7 kW/5 hp, 1420 rpm, delta connected squirrel cage induction motor is used to drive a constant power load. It has its per-phase equivalent circuit parameters referred to stator: R1=5.392, R2=5.722, X, =X2=8.222, Rm=20002, and Xm=192 2 at rated voltage and frequency of 415 V, 50 Hz. At 360 V, 50 Hz, it has Rm=2100 2 and Xm=2402. Calculate its (a) supply current, (b) losses, and (c) input power at rated speed and voltage. Calculate its (d) supply current, (e) losses, and (f) input power at rated speed and 360 V, 50 Hz. For constant output power, consider new slip=rated slipx (Vrated VNew) approximation,
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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