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Find the magnitude and phase angles of the currents in the is applied to the motor under starting conditions. (b) Find they t will place the main- and auxiliary winding currents in epeat part (a) when the capacitance of part (b) is inserted in s

Find the magnitude and phase angles of the currents in the is applied to the motor under starting conditions. (b) Find they t will place the main- and auxiliary winding currents in epeat part (a) when the capacitance of part (b) is inserted in s

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
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single phase machines
A 1-kW, 120-V, 60-Hz capacitor start motor has the following parameters for the main and auxiliary windings (at starting): Zmain = 4.82 + j 7.25 ohm (main winding) and Zaux = 7.95 + j 9.21 ohm (auxiliary winding). (a) Find the magnitude and phase angles of the currents in the two windings when rated voltage is applied to the motor under starting conditions. (b) Find the value of starting capacitance that will place the main- and auxiliary winding currents in time quadrature at starting. (c) Repeat part (a) when the capacitance of part (b) is inserted in series with the auxiliary winding.
Transcribed Image Text:A 1-kW, 120-V, 60-Hz capacitor start motor has the following parameters for the main and auxiliary windings (at starting): Zmain = 4.82 + j 7.25 ohm (main winding) and Zaux = 7.95 + j 9.21 ohm (auxiliary winding). (a) Find the magnitude and phase angles of the currents in the two windings when rated voltage is applied to the motor under starting conditions. (b) Find the value of starting capacitance that will place the main- and auxiliary winding currents in time quadrature at starting. (c) Repeat part (a) when the capacitance of part (b) is inserted in series with the auxiliary winding.
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