High efficiency power source for reactive loads

Details High efficiency power source for reactive loads High efficiency power source for reactive loads

1987-07-14

1988-04-12

Salce, Patrick R.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

H02M 7525

Patent

active

047379014

ABSTRACT:
An apparatus for increasing the power conversion efficiency of electronic amplifiers into both resistive and reactive loads by means of power supply driver bias level switching. The apparatus employs a multi-level direct current voltage supply to provide multi-level biasing to output power devices. Comparator circuits continuously monitor the output voltage and compare it with the direct current multi-level bias voltage of the bias power supply. In accordance with load voltage demands, a switching circuit associated with each comparator selectively connects one of the direct current multi-level power supply voltage to the power amplifying element of the amplifier whereby the minimum voltage of the available multi-level power supply voltage sufficient to maintain operation as a class B amplifier is applied across the output driver.

REFERENCES:
patent: 2994832 (1961-08-01), James
patent: 3100851 (1963-08-01), Ross et al.
patent: 3227889 (1966-01-01), Paynter
patent: 3539902 (1970-11-01), Hickling
patent: 3832643 (1974-08-01), Van Heyningen et al.
patent: 3867643 (1975-02-01), Baker et al.
patent: 3903469 (1975-09-01), Ravas

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