Switch-mode power supply for bridged linear amplifier

Details Switch-mode power supply for bridged linear amplifier Switch-mode power supply for bridged linear amplifier

1995-03-27

1996-04-30

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 41, 323266, H02M 324, G05F 140

Patent

active

055130941

ABSTRACT:
A power converter which includes a bridged power amplifier powered from a sole or single DC input power source through a plurality of parallel connected PWM buck converters. The converters are modulated with reference signals which operate in time alternation such that in any conversion cycle there exists a plurality of modulating wave forms which are identical except for their time delays and which are evenly spaced in time over a single conversion cycle. A feedback control amplifier compares the voltage output of the parallel connected converters through the magnitude of the amplifier's required supply voltage and drives the modulating components of the circuit to control the switching duty cycle of each of the individual PWM converters.

REFERENCES:
patent: 3414802 (1968-12-01), Harrigan et al.
patent: 4788452 (1988-11-01), Stanley
patent: 5045990 (1991-09-01), Stanley
"A G00W Four-Stage Phase-Shifted-Parallel DC-DC Converter", IEEE, apr. 1987.
"A Pulsewidth-Modulated Inverter with Parallel Connected Transistors Using Current-Sharing Reactors," IEEE, Apr. '93.
"Phase-Staggering Control of a Series-Resonant DC-DC Converter with Paralleled Powers Modules," IEEE, Apr. '88.

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