The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2019
Filed:
Mar. 23, 2015
Robert Bosch Gmbh, Stuttgart, DE;
Olivier Cois, Kernen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The present invention relates to a method for monitoring the state of the earthing contacts of a contactor controlled by an exciter coil, said contactor being operated as part of an isolation unit for galvanically isolating a voltage source from an electric consumer device connected to the voltage source, wherein a first power loss (), which is transferred via the earthing contacts, and a second power loss (), which is transferred via the exciter coil, are detected, and the first power loss () and the second power loss () are fed as input variables to a thermal model () of the contactor, the thermal model () determines an earthing contact temperature () according to at least one of the input variables and provides said contactor temperature as an output variable, and the provided earthing contact temperature () is evaluated.