Patent · US Expired

Bridge circuit for driving a brushless DC motor

US5600216A · kind A · utility

8Cited by

6References

17Claims

0Family size

Assignee

Papst Motoren GmbH & Co KG · DE

Inventors

Arno Karwath · Rottweil, DE
Mojtaba Moini · Rehna, DE

Key dates

Filing date	Jul 13, 1993
Grant date	Feb 4, 1997
Priority date	—
Expiry date	Jul 13, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention pertains to a bridge circuit and a drive circuit for it, in particular for driving a brushless DC motor. The bridge circuit exclusively consists of n-channel field-effect transistors. An auxiliary potential generated by at least one potential sliding capacitor is provided for driving these particular field-effect transistors which are connected to the positive supply voltage. The auxiliary potential is already built up before the starting of the motor by means of special switching measures, and said auxiliary potential exists at a defined intensity during extended standstill times of the motor.

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