Combined PWM-FM control method and circuit for the high efficien

Details Combined PWM-FM control method and circuit for the high efficien Combined PWM-FM control method and circuit for the high efficien

1986-11-18

1987-10-13

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363131, H02M 75395

Patent

active

047002859

ABSTRACT:
A PWM-FM control method and circuit is employed to control the output level of a resonant switch-mode inverter/converter. The frequency of the inverter/converter is controlled via a nonlinear function shaper and VCO or ICO by the same voltage which controls the pulse-width such that the turn-on of the controlled switching element(s) always occur(s) at substantially zero voltage and substantially zero current across the switching element(s), thereby minimizing switching losses and maximizing efficiency.

REFERENCES:
patent: 3596165 (1971-07-01), Andrews
patent: 4535399 (1985-08-01), Szepesi
patent: 4631652 (1986-12-01), Wendt

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