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. 05, 2015
Filed:
Jun. 22, 2009
Takahiko Hasegawa, Toyota, JP;
Nobuyuki Kitamura, Minamitsuru-gun, JP;
Kota Manabe, Toyota, JP;
Takahiro Umehara, Toyota, JP;
Takahiko Hasegawa, Toyota, JP;
Nobuyuki Kitamura, Minamitsuru-gun, JP;
Kota Manabe, Toyota, JP;
Takahiro Umehara, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-Shi, JP;
Abstract
Provided is a converter control device which detects an on-failure of an auxiliary switch constituting an auxiliary circuit of a soft switching converter and can prevent element failures. A current sensor for detecting the current flowing in a coil is provided between a fuel cell and the. A controller sequentially detects current by use of the current sensor and makes a judgment as to whether or not the detected current has exceeded an overcurrent threshold value stored in a memory (not shown). When the controller judges that the current has exceeded the overcurrent threshold value, the controller judges that a second switching element has an on-failure, and performs a fail-safe operation by stopping the driving of a converter (for example, a U-phase converter) of an auxiliary circuit provided with this second switching element.