Power supply in which regulation is achieved by processing a sma

Details Power supply in which regulation is achieved by processing a sma Power supply in which regulation is achieved by processing a sma

1989-03-14

1990-07-24

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

323263, 363 25, 363134, H02M 3337

Patent

active

049439030

ABSTRACT:
Regulation of an AC or DC voltage is achieved by processing a major portion of the prime power through a square wave inverter and a small portion of the prime power through a pulse width modulated switching regulator. The methods of regulation generally comprises the steps of: processing the unregulated input voltage to provide an output voltage; regulating an unregulated portion of the input voltage in response to a feedback signal indicative of the output voltage to provide a regulating voltage; and combining the regulating voltage with the output voltage to generate a regulated output voltage. The regulator circuit includes a square wave inverter circuit that produces a voltage in an output transformer, while a pulse width modulator regulates the output voltage in response to a feedback signal. The regulation is accomplished by pulse width modulating the portion of the input voltage that is unregulated, and applying this modulated voltage to a second transformer that combines the pulse width modulated voltage with the primary voltage in an AC fashion to produce the regulated output voltage. The invention improves the efficiency and reduces the weight and complexity of conventional voltage regulating devices.

REFERENCES:
patent: 3571692 (1971-03-01), Andren
patent: 3596172 (1971-07-01), Harrison
patent: 3764887 (1973-10-01), Bingley
patent: 3925715 (1975-12-01), Venable
patent: 4034280 (1977-07-01), Cronin et al.
patent: 4445049 (1984-04-01), Steigerwald

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