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:
Sep. 24, 2019
Filed:
Aug. 08, 2016
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
An electronic control unit includes: inverter circuits of first and second systems driving a multiphase motor with coil sets on a coil set basis; first and second phase potential detecting circuits detecting potentials of at least one phase of current supply paths from the inverter circuits to the coil set; and a diagnosis apparatus detecting a failure based on potentials detected by the first and second phase potential detecting circuits. Under condition that the inverter circuit of the first system turns ON the upper or lower arm switching element corresponding to one phase of the first coil set and turns OFF the other one so that the inverter circuit of the second system has a high-impedance output, when the potential detected by the second phase potential detecting circuit corresponds to an output potential of the inverter circuit of the first system, the diagnosis apparatus determines that a short-circuit failure occurs.