US 2001/0044640 A1 · Semiconductor switch driving circuit

Abstract

To provide a semiconductor switch driving circuit in which a stable conducting state and a non-conducting state can be kept, the high-speed switching operation is enabled, a lag of switching timing is minimized and which has a simple circuit, the semiconductor switch driving circuit for driving a semiconductor switch in which multistage switching devices (IGBT) are connected includes a transformer, a primary side and a secondary side and is configured so that voltage between the gate and the emitter of a switching device can be continuously kept positive, voltage between the gate and the emitter can be continuously kept negative, voltage between the gate and the emitter is alternately switched to positive voltage or negative voltage

Claims10

Dependent claims

A semiconductor switch driving circuit comprising:

a transformer;
a primary side area provided on the primary side of the transformer for controlling current on the primary side of the transformer according to a control signal for controlling a semiconductor switch;
and
a secondary side area provided on the secondary side of the transformer for directly driving a switching device, voltage between the gate and the emitter of the switching device being continuously kept positive, voltage between the gate and the emitter being continuously kept negative and voltage between the gate and the emitter being alternately switched in positive and negative.

1 more element

Dependencies are inferred from the claim text.

Semiconductor switch driving circuit

Life of this patent

Semiconductor switch driving circuit

Life of this patent

Abstract

Claims10