Patent · US Expired

Thermal monitoring of an electric load element

US6897782B2 · kind B2 · utility

6Cited by

4References

16Claims

0Family size

Assignee

BROSE FAHRZEUGTEILE GMBH & CO. KG, COBURG · DE

Inventors

Peter Heinrich · Oberhausen, DE
Karl Preis · Heidenheim, DE
Steffen Nicolai · Ilmenau, DE
Michael Huhn · Dresden, DE
Jochen Ehrenpfordt

Key dates

Filing date	Apr 25, 2001
Grant date	May 24, 2005
Priority date	—
Expiry date	Apr 28, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02H6/005
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for monitoring thermal overload of an electric load element in a motor vehicle containing other electric consumers, which can be switched into a stand-by phase is disclosed. The load element is monitored by a control device using a calculated load temperature parameter. During a first operational phase, a power loss of the load element or a quantity that is essentially proportional thereto is evaluated for calculating the load temperature parameter. During one or more stand-by phases, the control device is switched with essentially no current between the first operational phase and a second operational phase. After the control device is switched on in the second operational phase, at least one quantity, which is characteristic for the moment of switching on, is evaluated for calculating the existing load temperature parameter.

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