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:
Feb. 09, 2021
Filed:
May. 02, 2019
Trw Limited, Solihull, GB;
Nathanael Rice, Nottingham, GB;
Tamas Terdy, Birmingham, GB;
TRW Limited, Solihull, GB;
Abstract
A method of controlling an electric power assisted steering (EPS) system comprising one or more inverter bridges each connected to a multi-phase motor configured to provide power assist to steering of a vehicle, wherein each inverter comprises a plurality of switching elements each associated with a phase of the motor, the method comprising in response to detecting a predefined event affecting current flow in one or more of the inverter bridges, preventing current flow in said one or more affected inverters by applying a gate-source voltage to one or more of the switching elements of the affected inverter bridge(s), wherein the switching elements are configured to conduct in the off-state when reverse biased beyond a reverse conduction threshold voltage, and wherein applying the gate-source voltage comprises applying a negative gate-source voltage to control the reverse conduction threshold voltage of the switching elements in the off-state only at a time when there is no current flowing in the direction drain to source through the switching device that exceeds a threshold value.