Power spectra of a PWM inverter with randomized pulse position

Author

Kirlin, R. Lynn ; Kwok, Sam ; Legowski, Stanislaw ; Trzynadlowski, Andrzej M.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

9

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

463

Lastpage

472

Abstract

Random pulse width modulation in static power converters results in the partial transfer of power from the discrete spectrum of the output voltage to the continuous spectrum, with advantageous effects on the operation of the supplied electromechanical systems. In this paper, a random PWM technique with randomized pulse position for three-phase voltage-controlled inverters is analyzed. Closed-form equations for the discrete and continuous power spectra of the line-to-line and line-to-neutral voltages of the inverter have been derived and confirmed by experiments. Presented theory opens the way to numerical optimization of the voltage spectra of randomly modulated inverters

Keywords

invertors; pulse width modulation; voltage control; PWM inverter; closed-form equations; continuous spectrum; discrete power spectra; electromechanical systems; line-to-line voltages; line-to-neutral voltages; numerical optimization; partial power transfer; power spectra; random pulse width modulation; randomized pulse position; static power converters; three-phase voltage-controlled inverters; Acoustic noise; Electromagnetic interference; Power system harmonics; Pulse inverters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Resonance; Space vector pulse width modulation; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.321030

Filename

321030