Patent · US Expired

Device for the incremental control of a direct-current motor for the cooling fan of a motor vehicle

US7683561B2 · kind B2 · utility

0Cited by

8References

16Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Richard Vogt · Kehl, DE
Andreas Ewert · Lichtenau, DE
Michael Strupp · Durmersheim, DE

Key dates

Filing date	Nov 30, 2004
Grant date	Mar 23, 2010
Priority date	—
Expiry date	May 14, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH02P7/288
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a device (10) for the incremental control of at least one first direct-current motor (12) for the cooling fan of a motor vehicle. Said device comprises a first (14) and a second current-limiting component (16), and a first (22), a second (24) and a third switching element (28). The inventive device is characterized in that the switching elements (22, 24, 28) connect the first (14) and the second current-limiting component (16) in such a manner that the cooling capacity of the cooling fan can be varied in at least four levels different from zero.

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