Low dissipation snubber for switching power transistors

Details Low dissipation snubber for switching power transistors Low dissipation snubber for switching power transistors

1981-07-14

1983-11-08

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 307315, H03K 1704, H03K 1760

Patent

active

044144792

ABSTRACT:
A low dissipation snubber for switching power transistors uses the energy stored in a snubber capacitor to provide all the base boost power required for switching the power transistors on. The snubber consists of a diode and a snubber capacitor connected in series between the collector and emitter of the switching transistors with a resistor connected at one end to the junction of the diode and the snubber capacitor. The other end of the resistor is connected to the base turn-on circuit for the switching power transistors so as to provide a discharge path for the snubber capacitor. By using the discharge of the snubber capacitor, power which is normally dissipated as heat is reclaimed so that the drive power requirements for the switching power transistors are reduced.

REFERENCES:
patent: 3571614 (1971-03-01), Rolstead
patent: 4010387 (1977-03-01), Akamatsu
patent: 4365171 (1982-12-01), Archer

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