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:
Nov. 11, 2014
Filed:
Jun. 18, 2009
Applicants:
Toshihiko Minamii, Nisshin, JP;
Takahiko Hasegawa, Toyota, JP;
Inventors:
Toshihiko Minamii, Nisshin, JP;
Takahiko Hasegawa, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2006.01); H02J 1/10 (2006.01); H02J 3/38 (2006.01); H02J 7/34 (2006.01); H02H 7/122 (2006.01); H02M 3/158 (2006.01); H02M 1/32 (2007.01);
U.S. Cl.
CPC ...
H02H 7/1225 (2013.01); H02M 3/158 (2013.01); H02M 1/32 (2013.01);
Abstract
An apparatus comprises: a voltage monitoring unit for monitoring input direct-current voltages of first and second converters whose output ends are connected in parallel to each other; and a judgment control unit for judging that an output diode of the first converter is short-circuited, when an input direct-current voltage monitored by the voltage monitoring unit with respect to the first converter rises up to a post-step-up voltage stepped up by the second converter during a step-up operation of the second converter.