Transformerless fast current limiter with symetry correction for

Details Transformerless fast current limiter with symetry correction for Transformerless fast current limiter with symetry correction for

1979-12-04

1981-10-06

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02P 1322

Patent

active

042939020

ABSTRACT:
A switched mode power supply employs a pulse width modulation controlled DC-to-DC converter to change a first voltage from a source of DC power into a regulated power source providing direct current at a second DC voltage. A transformerless current-sensing device is adapted for connection in the path between said source and said converter and provides a control signal which is representative of the current flowing in said path. A current-limiter control circuit is responsive to said control signal and provides an enabling output state when the sensed-current exceeds a predetermined value. The enabling state overrides the pulse width modulator control and inhibits the converter, thus terminating the output pulse when the sensed current exceeds said predetermined value.

REFERENCES:
patent: 3859586 (1975-01-01), Wadlington
patent: 3873903 (1975-03-01), Koetsch et al.
patent: 3916282 (1975-10-01), Rothermal
patent: 3930194 (1975-12-01), Walker

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