Power factor enhancement of induction machines by means of solid-state excitation

Author

Muljadi, Eduard ; Lipo, Thomas A. ; Novotny, D.W.

Author_Institution

Dept. of Electr. Eng., California State Univ., Fresno, CA, USA

Volume

4

Issue

4

fYear

1989

fDate

10/1/1989 12:00:00 AM

Firstpage

409

Lastpage

418

Abstract

A novel concept for power factor correction of induction machines is introduced that employs an auxiliary three-phase stator winding together with a pulse-width-modulated (PWM) inverter to supply excitation power to the machine. When the PWM inverter is modeled as an equivalent capacitor, it is shown that two values of capacitance will yield unity power factor at a given operating condition. The effect of machine parameters on the critical value of capacitance is examined. A control algorithm to ensure unity power factor at the terminals of the main stator windings is presented, and its satisfactory operation is verified by means of a detailed analog computer simulation

Keywords

asynchronous machines; compensation; digital simulation; electric machine analysis computing; exciters; invertors; machine theory; power factor correction; pulse width modulation; reactive power; stators; PWM inverter; analog computer simulation; asynchronous machines; auxiliary three-phase stator winding; control algorithm; electric machine analysis computing; equivalent capacitor; excitation power; induction machines; machine parameters; power factor correction; solid-state excitation; Analog computers; Capacitance; Capacitors; Induction machines; Power factor correction; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Reactive power; Stator windings;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.41768

Filename

41768