Patent · US Active

Detection of the amount of wear on a motor drive system

US7629723B2 · kind B2 · utility

1Cited by

14References

16Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andre Bollwerk · Steinheim an der Murr, DE
Wolfgang Reeb · Baunach, DE
Reiner Fellmeth · Besigheim, DE

Key dates

Filing date	Dec 8, 2006
Grant date	Dec 8, 2009
Priority date	—
Expiry date	Nov 19, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH01R39/58
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and a device, respectively, for detecting the amount of wear on the carbon brush drive system of an electrically commutated d.c. motor which is used, for example, in the form of a pump motor in a motor vehicle. The d.c. motor is driven by at least two carbon brushes and includes means for detecting the generative follow-up voltage. The amount of wear on at least one carbon brush is derived from the time behavior of the generative motor voltage and displayed to the driver.

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