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:
Oct. 30, 2012
Filed:
Dec. 02, 2008
Tatsuo Morita, Kyoto, JP;
Yasuhiro Uemoto, Shiga, JP;
Tsuyoshi Tanaka, Osaka, JP;
Matsuo Shiraishi, Aichi, JP;
Atsushi Morimoto, Aichi, JP;
Kouichi Ishikawa, Aichi, JP;
Tatsuo Morita, Kyoto, JP;
Yasuhiro Uemoto, Shiga, JP;
Tsuyoshi Tanaka, Osaka, JP;
Matsuo Shiraishi, Aichi, JP;
Atsushi Morimoto, Aichi, JP;
Kouichi Ishikawa, Aichi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A motor driving circuit includes a three-phase inverter circuit, including three upper-arm switching elementstofor driving upper arms of different phases of a three-phase motor, and three lower-arm switching elementstofor driving lower arms of different phases. At least one of the upper-arm switching elementstoand the lower-arm switching elementstois a semiconductor element that performs a diode operation. The diode operation is an operation in which a voltage less than or equal to a threshold voltage of a gate electrode G is applied to the gate electrode G with reference to a potential of a first ohmic electrode S, thereby conducting a current flow from the first ohmic electrode S to a second ohmic electrode D and blocking a current flow from the second ohmic electrode D to the first ohmic electrode S.