A new ´slope-modulated´ PWM strategy for implementation in a single chip gate array

Author

Salmon, John C.

Author_Institution

Dept. of Electr. Eng., Civil/Electr. Building, Edmonton, Alta., Canada

fYear

1988

fDate

2-7 Oct. 1988

Firstpage

388

Abstract

The task of designing a gate-array-based, dedicated, three-phase PWM (pulsewidth-modulated) modulator for electric drive control is addressed. A novel slope-modulated PWM strategy is presented. Sine-wave and square-wave signal references, under several operating modes, are used to demonstrate the modulation properties. Performance parameters, such as reliable inverter switching, minimum on/off times, peak inverter switching frequency, total harmonic distortion, and pulse dropping are described. The modulator is shown to generate high-resolution PWM waveforms, with excellent performance when a variable-frequency ratio strategy is used with a sine-wave reference signal. The square-wave reference signal uses less complex digital circuitry, with a reliable operation of the inverter bridge.<>

Keywords

electric drives; invertors; logic arrays; pulse width modulation; dedicated 3-phase PWM modulator; electric drive control; high-resolution PWM waveforms; peak inverter switching frequency; pulse dropping; pulsewidth-modulated; reliable inverter switching; sine-wave signal references; single chip gate array; square-wave signal references; total harmonic distortion; variable-frequency ratio strategy; Bridge circuits; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Signal generators; Space vector pulse width modulation; Switching frequency; Total harmonic distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1988., Conference Record of the 1988 IEEE

Conference_Location

Pittsburgh, PA, USA

Type

conf

DOI

10.1109/IAS.1988.25091

Filename

25091