Gate drive using continuous alternating power and a diode H-brid

Details Gate drive using continuous alternating power and a diode H-brid Gate drive using continuous alternating power and a diode H-brid

1994-04-29

1995-07-18

Heyman, John S.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327448, 327494, 327588, H03K 17687, H03K 1774

Patent

active

054345286

ABSTRACT:
A gate drive circuit for a power switching device having first and second power terminals and a gate terminal comprises an H-bridge rectifier having first, second, third, and fourth rectifiers, the anodes of the first and second rectifiers being mutually coupled at a midpoint to the cathodes of the third and fourth rectifiers. This midpoint is coupled to the gate terminal of the power switching device. A continuous alternating waveform generator is coupled to output selection control logic which selectively applies the waveform to either a first transformer, whose secondary is coupled to the anodes of the third and fourth rectifiers of the H-bridge for transforming the waveform from a control signal reference system to a power signal reference system, or to a second transformer, whose secondary side is coupled to the cathodes of the first and second rectifiers of the H-bridge for transforming the waveform from the control signal reference system to the power signal reference system. The output selection control logic applies the waveform to the first transformer to drive the power switching device into conduction, and alternatively to the second transformer to drive the power switching device out of conduction.

REFERENCES:
patent: Re33378 (1990-10-01), Mehl
patent: 4634903 (1987-01-01), Montorfano
patent: 4906876 (1990-03-01), Landseadel
patent: 5055722 (1991-10-01), Latos et al.
patent: 5204561 (1993-04-01), Rischmiiller
patent: 5302862 (1994-04-01), Steigerwald

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