Patent · US Expired

Circuit arrangement for the overvoltage protection of a power transistor for controlling an inductive load

US6657841B1 · kind B1 · utility

11Cited by

4References

5Claims

0Family size

Assignee

Moeller GmbH · DE

Inventors

Wilhelm Melchert · Hennef (Sieg), DE
Gerd Schmitz · Niederkassel, DE

Key dates

Filing date	Mar 1, 2002
Grant date	Dec 2, 2003
Priority date	—
Expiry date	May 30, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH03K17/08142
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A circuit arrangement for overvoltage protection of a power transistor for controlling an inductive load includes a first varistor which bridges-over the supply connections. A second varistor is arranged parallel in relation to the switching path of the power transistor and in series with a switching transistor. The switching transistor can be controlled by a voltage divider which is connected to the supply voltage via a Zener diode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.