Patent · US Active

Method and apparatus for detecting blocking of a direct current motor

US8063590B2 · kind B2 · utility

0Cited by

6References

16Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Norbert Knab · Appenweier, DE
Nikolas Haberl · Baden-Baden, DE
Frank Fischer · Mesa, US
Joerg Eichhorn · Laufenburg (Baden), DE

Key dates

Filing date	Jun 1, 2005
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Jun 8, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/093
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Both a method and a use by this method of an apparatus for detecting blocking of a direct current motor (10), in particular a direct current motor (10) for a blower of a motor vehicle, is presented. The direct current motor (10) is deactivated by a computer unit (20) with the aid of a switching means (18) for a defined time period (Toff). Within the defined time period (Toff), at least one subsequent time (ta, tb), an induced voltage (U) of the direct current motor (10) is measured and forwarded to the computer unit (20). The direct current motor (10) remains deactivated if the induced voltage (U) undershoots a predetermined threshold value (Uth), or the direct current motor (10) is reactivated if the induced voltage (U) of the direct current motor (10) does not undershoot the predetermined threshold value (Uth).

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