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Outline the locked rotor and no load tests for an induction motor

Outline the locked rotor and no load tests for an induction motor

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Q4 (a) Outline the locked rotor and no load tests for an induction motor and indicate the necessary measurements and calculations to determine equivalent circuit parameters. (b) The per phase equivalent circuit parameters for a 3 phase, 4 pole star connected induction machine operating off a 230 V (phase voltage), 50 Hz supply are shown on Table Q4b. Assuming that friction and windage losses are negligible, determine the following for operation at a slip of 0.025: (i) (ii) (iii) (iv) (v) (vi) The per phase equivalent circuit (including values below) The actual motor speed (rpm) The mechanical power (W) The torque (Nm) The motor losses (W) The motor efficiency (%) Parameter Value Хм 352 R. 1052 R, 0.22 R, 0.152 Xeg 1.50 Table Q4b (c) Induction motors can also operate off 2 phase AC supplies. Outline the necessary electrical supply and mechanical winding arrangements for this type of motor.
Transcribed Image Text:Q4 (a) Outline the locked rotor and no load tests for an induction motor and indicate the necessary measurements and calculations to determine equivalent circuit parameters. (b) The per phase equivalent circuit parameters for a 3 phase, 4 pole star connected induction machine operating off a 230 V (phase voltage), 50 Hz supply are shown on Table Q4b. Assuming that friction and windage losses are negligible, determine the following for operation at a slip of 0.025: (i) (ii) (iii) (iv) (v) (vi) The per phase equivalent circuit (including values below) The actual motor speed (rpm) The mechanical power (W) The torque (Nm) The motor losses (W) The motor efficiency (%) Parameter Value Хм 352 R. 1052 R, 0.22 R, 0.152 Xeg 1.50 Table Q4b (c) Induction motors can also operate off 2 phase AC supplies. Outline the necessary electrical supply and mechanical winding arrangements for this type of motor.
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