Method for generating pulse width modulated control signals

Details Method for generating pulse width modulated control signals Method for generating pulse width modulated control signals

1985-04-15

1986-04-01

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

329106, 363 26, H03K 3017, H03K 908, H02M 3335

Patent

active

045800642

ABSTRACT:
A method for generating pulse width modulated (PWM) control signals from a reference waveform uses a unipolar timing waveform to modulate the reference waveform thereby avoiding the need for lock-out intervals to prevent shoot-through in power inverters supplied by the PWM control signals. Further, a sinusoidal reference waveform is approximated by a trapezoid, simplifying the computation of switching points located at intersections between the reference and timing waveforms.

REFERENCES:
patent: 2762002 (1956-09-01), Umpleby
patent: 3253228 (1966-05-01), Montner
patent: 3418433 (1968-12-01), Hodge
patent: 3440566 (1969-04-01), Swanson
patent: 4244015 (1981-01-01), Beebe
patent: 4263501 (1981-04-01), Wilhelmson
patent: 4306181 (1981-12-01), Welbarn
"A Microcomputer-Based Control Signal Generator for a Three-Phase Switching Inverter", IEEE Transaction on Industry Applications, vol. IA-19, No. 2, Mar./Apr. 1983, pp. 228-234, M. Varnovitsky.

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