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:
Jul. 14, 2009
Filed:
Apr. 05, 2007
Hiroshi Katayama, Kumamoto, JP;
Koichi Yahata, Hitachinaka, JP;
Masashige Tsuji, Hitachinaka, JP;
Takashi Fujimoto, Hitachinaka, JP;
Hiroaki Igarashi, Hitachinaka, JP;
Hiroshi Katayama, Kumamoto, JP;
Koichi Yahata, Hitachinaka, JP;
Masashige Tsuji, Hitachinaka, JP;
Takashi Fujimoto, Hitachinaka, JP;
Hiroaki Igarashi, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A power inverter comprises a power module connected at least to a rotating electric machine, a gate drive circuit board which supplies switching power to the power module, and a rotating electric machine control circuit board which supplies a signal for controlling the waveform of the switching power to the gate drive circuit board. A noise reduction board is formed on a board different from the rotating electric machine control circuit board. The configuration of the noise reduction board is such that various signals for forming a signal for controlling the waveform of the switching power by means of the rotating electric machine control circuit board are inputted through the noise reduction board to the rotating electric machine control circuit board.