hase, 50-Hz induction motor with its rotor star-connected gives 500-V(r.m.s.) at till between the slip-rings on open-circuit. Calculate the current and power factor at till when the rotor winding is joined to a star-connected external circuit, each of which has a resistance of 10 Q and an inductance of 0.04 H. The resistance per of the winding is 0.2 Q and its inductance is 0.04 H. Also, calculate the current and factor when the slip-rings are short-circuited and the motor is running with a slip of ent. Assume flux remain constant.
hase, 50-Hz induction motor with its rotor star-connected gives 500-V(r.m.s.) at till between the slip-rings on open-circuit. Calculate the current and power factor at till when the rotor winding is joined to a star-connected external circuit, each of which has a resistance of 10 Q and an inductance of 0.04 H. The resistance per of the winding is 0.2 Q and its inductance is 0.04 H. Also, calculate the current and factor when the slip-rings are short-circuited and the motor is running with a slip of ent. Assume flux remain constant.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:A 3-phase, 50-Hz induction motor with its rotor star-connected gives 500-V(r.m.s.) at
standstill between the slip-rings on open-circuit. Calculate the current and power factor at
standstill when the rotor winding is joined to a star-connected external circuit, each
phase of which has a resistance of 10 Q and an inductance of 0.04 H. The resistance per
phase of the winding is 0.2 Q and its inductance is 0.04 H. Also, calculate the current and
power factor when the slip-rings are short-circuited and the motor is running with a slip of
5 per cent. Assume flux remain constant.
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