Snubber circuit for power converter

Details Snubber circuit for power converter Snubber circuit for power converter

1992-03-27

1993-11-09

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307571, 307633, 363 56, H02H 7125, H03K 1760

Patent

active

052606074

ABSTRACT:
A snubber circuit for a DC chopper-type power converter having a power supply and a switching circuit connected to a load, the switching circuit comprising a switch and a diode, and the snubber circuit having a combination of capacitances, diodes and inductances to direct and store currents and voltages during the ON/OFF operation of the switch. A surge current and voltage suppressing capability is provided by the series connection of an inductor or reactor between the switch and the diode in the switching circuit, with the load circuit being connected at either end of the inductor or reactor element. Further, the snubber may be arranged as two parallel series circuits, one containing the switch, inductor and diode and another containing additional diodes and inductance. Resonance suppression may be provided by the further addition of a capacitor between the inductor in the first series circuit and the diodes in the second series circuit. The power converter may be any of a voltage-raising chopper type, a voltage dropping chopper type, a voltage reversible chopper type, a CUK type and a forward type, and may be embodied as a half-bridge inverter.

REFERENCES:
patent: 4414479 (1983-11-01), Foley
patent: 4783727 (1988-11-01), Neumann
patent: 4805079 (1989-02-01), Van Buul
patent: 4922365 (1990-05-01), Mori

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