Switching power apparatus with 3-state driver

Details Switching power apparatus with 3-state driver Switching power apparatus with 3-state driver

1990-05-02

1993-12-14

Stephan, Steven L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 98, 363132, 363134, H02M 75387

Patent

active

052709043

ABSTRACT:
The switching power apparatus has high efficiency, high reliability and very small number of components. A power transformer is used if line isolation is necessary. The apparatus is operable with almost any configuration comprising at least one bidirectional or two unidirectional switches for producing AC or DC outupt signal. The switching is minimized with increasing output signal level as to maximize the efficiency but with no significant deterioration of the harmonic distortion level.
A resistor divider provides two feedback signals in response to the output signal. Two comparators compare the input signal against the feedback signals and provide two comparison signals. Two flip-flops temporarily store the comparison signals. A switching amplifier provides the output signal in response to the comparison signals stored in the flip-flops. If output signal correction is unnecessary, the switching amplifier is in idle state.

REFERENCES:
patent: 4241243 (1980-12-01), Ball
patent: 4307441 (1981-12-01), Bello
patent: 4476441 (1984-10-01), Gulczynski
patent: 4736286 (1988-04-01), Gulczynski
patent: 4794508 (1988-12-01), Carroll
patent: 4803610 (1989-02-01), Gulczynski
patent: 4845391 (1989-07-01), Gulczynski
patent: 4853837 (1989-08-01), Gulczynski
patent: 4871980 (1989-10-01), Gulczynski
patent: 4940906 (1990-07-01), Gulczynski
patent: 4947308 (1990-08-01), Gulczynski

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