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. 29, 2018
Filed:
Dec. 10, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Tomonobu Koseki, Isesaki, JP;
Tomishige Yatsugi, Isesaki, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
The present invention relates to an electric motor drive device where a first inverter and a second inverter both supply power to one electric motor and to a control method for the electric motor drive device. A control unit for controlling an output of each inverter increases an output of the inverter of which a drive control system has first completed an initial diagnosis, ahead of the other inverter. If either inverter is about to overheat, the control unit decreases an output of the inverter that is about to overheat while keeping or increasing an output of the other inverter having the normal temperature.