Method and apparatus for selectively controlling an operation mo

Details Method and apparatus for selectively controlling an operation mo Method and apparatus for selectively controlling an operation mo

1987-07-22

1988-10-18

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

318811, H02M 108

Patent

active

047791837

ABSTRACT:
A method and apparatus are disclosed for controlling a pulse width modulated (PWM) inverter controlled for ignition by a (PWM) pulse produced with a carrier wave and a modulation wave. The method comprises sampling an amplitude of the modulation wave at a cycle rate related to the frequency of the carrier wave. The modulation wave and the carrier wave are synchronized when the sample modulation wave amplitude has a peak value greater than an amplitude of the carrier wave. The modulation wave and the carrier wave are asynchronized when the sampled modulation wave has a peak value less than the amplitude of the carrier wave.

REFERENCES:
patent: 4318167 (1982-03-01), Angquist
patent: 4409535 (1983-10-01), Hickman
patent: 4419615 (1983-12-01), Muto et al.
patent: 4615000 (1986-09-01), Fujii et al.

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