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:
May. 30, 2017
Filed:
Feb. 10, 2014
Trw Limited, Solihull West Midlands, GB;
Peter Geoffrey Scotson, Worcestershire, GB;
TRW Limited, Solihull, West Midlands, GB;
Abstract
A method of monitoring an electric motor circuit of the kind comprising an electric motor having a plurality of phases delta configuration, a plurality of electrical switches arranged in a bridge, operable in response to signals from a controller to selectively connect the phases to a power supply, the motor controller being responsive to a current error signal dependent on the difference between a demanded motor current value and an actual motor current value indicative of the actual current flowing in the motor where the method comprising the steps of processing at least one signal that is present in use of the electric motor circuit to identify a frequency component of the at least one signal that meets certain predefined criteria and in the event that the component is identified and that it does meet the criteria providing an indication that there is a fault.