Power converter

Details Power converter Power converter

1992-10-22

1995-10-24

Wong, Peter S.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363137, H02M 748

Patent

active

054615569

ABSTRACT:
A power converter including a snubber circuit which is smaller and regenerates more energy than a conventional snubber circuit. A plurality of self-quenching semiconductor switching elements are connected in series across a power supply. A capacitive element is connected to the switching elements, and is charged to more than the voltage of the power supply by a snubber action due to operation of any of the switching elements. The charge stored in the capacitive element is then regenerated to the power supply. The capacitance of the capacitive element can be almost as small as a minimum required capacitance, and can be as small as one-tenth of the capacitance required in a conventional snubber circuit, thereby providing a power converter which is smaller and has a smaller snubber loss than a conventional power converter.

REFERENCES:
patent: 3622863 (1971-11-01), King
patent: 4523269 (1985-06-01), Baker et al.
patent: 4881159 (1989-11-01), Holtz et al.
patent: 4924370 (1990-05-01), Toelle
patent: 4926306 (1990-05-01), Ueda et al.
English translations of German Patents, 3,915,510; 3,823,399; 4,121,177.
"GTO Driving and Protection Technique with Status Monitoring", p. 119, FIG. 11, IEEE Transactions on Industry Applications, vol. 24, No. 1, Jan./Feb. 1099, pp. 115-120, 1988.

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