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:
Jun. 20, 2006
Filed:
Oct. 12, 2004
Shinichi Fujino, Mito, JP;
Keita Hashimoto, Hitachinaka, JP;
Toshiyuki Innami, Mito, JP;
Masanori Tsuchiya, Hitachinaka, JP;
Shinichi Fujino, Mito, JP;
Keita Hashimoto, Hitachinaka, JP;
Toshiyuki Innami, Mito, JP;
Masanori Tsuchiya, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a power converter, an overvoltage suppression function of low cost and high reliability is provided. The power converter has a power conversion circuit, when driving a motor, for converting power from a battery and supplying it to the motor and when the motor generates power, converting the generated power of the motor and supplying it to the battery for storage of electricity and a drive circuit for driving the power conversion circuit. The power conversion circuit includes a plurality of paired switching elements, in which one of each paired switching elements is arranged on an upper arm, and the other is arranged on a lower arm, and each pair corresponds to each phase of the motor. The drive circuit, when the voltage applied to the power conversion circuit is increased, turns on all the switching elements on one arm, turns off all the switching elements on the other arm, thereby short-circuits the output terminals of the motor.