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:
Mar. 03, 2015
Filed:
Feb. 21, 2012
Seiji Funaba, Hitachinaka, JP;
Yasuo Noto, Hitachinaka, JP;
Masashige Tsuji, Hitachinaka, JP;
Keiji Kunii, Hitachiota, JP;
Koichi Yahata, Hitachinaka, JP;
Shinichiro Hida, Hitachinaka, JP;
Seiji Funaba, Hitachinaka, JP;
Yasuo Noto, Hitachinaka, JP;
Masashige Tsuji, Hitachinaka, JP;
Keiji Kunii, Hitachiota, JP;
Koichi Yahata, Hitachinaka, JP;
Shinichiro Hida, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
An electric power converter is provided with a plurality of power-conversion elements; a first control circuit that outputs a first control signal; an electricity storage circuit; a second control circuit that outputs a second control signal when the direct-current power source that supplies electrical power to the first control circuit is not normal; and a drive circuit that outputs drive signals for driving the plurality of power-conversion elements. Each of the power-conversion elements is either a power-conversion element of the upper arm connected to the high-voltage side or a conversion element of the lower arm connected to the low-voltage side. In cases when the voltage of the electricity storage circuit is at a higher predetermined first voltage value, the second control circuit outputs a second control signal so that all the power-conversion elements of the upper arm or the lower arm are turned on and the others are turned off.