Switch matrix drive circuit for a power element

Details Switch matrix drive circuit for a power element Switch matrix drive circuit for a power element

2007-07-03

2011-10-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S110000, C327S423000, C327S588000

Reexamination Certificate

active

08040162

ABSTRACT:
A drive circuit for an IGBT includes an H-bridge circuit using first to fourth switch elements. When a control unit receives a command for changing the IGBT from an on state to an off state, it switches states of the first to fourth switch elements from a first state in which the first and fourth switch elements are in an on state and the second and third switch elements are in an off state to a second state in which the first and fourth switch elements are in the off state and the second and third switch elements are in the on state. This structure of the drive circuit can apply a reverse bias to the IGBT from a single power supply.

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