Power control circuit with digital pulse width control

Details Power control circuit with digital pulse width control Power control circuit with digital pulse width control

1985-07-19

1987-01-13

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

246 34CT, 363 56, H02M 7529

Patent

active

046369333

ABSTRACT:
A bridge network 1 of current switching devices 2, 3, 4, 5 is operated in full wave manner by controlling signals A, B, C, D respectively produced by two similar, parallel and pulse width modulated power control circuits 12, 13 connected to receive a common input signal, one pair of opposing switch devices (2, 5) being controlled by one circuit 12 and the other pair 3, 4 being controlled by the other circuit 13. The pulse width control inputs 14 of the circuits 12, 13 are connected to voltage sensing means in the bridge supply circuit so that the pulse width of the control signals A, B, C, D is determined in accordance with the bridge supply level. The arrangement is such that the control circuits 12, 13 although not be designed to fail-to-safety standards operate in a fail-safe manner to provide a constant level output of the input signal.

REFERENCES:
patent: 4320880 (1982-03-01), Sibley
patent: 4454573 (1984-06-01), Petsch et al.

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