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. 08, 2003
Filed:
Mar. 29, 2001
Masami Hirata, Kawasaki, JP;
Tsuyoshi Shinohara, Yokohama, JP;
Kyouichi Okada, Yokohama, JP;
Isao Kishimoto, Yokohama, JP;
Kazuo Nagatake, Machida, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed. The control device includes a drive circuit converting a direct current to an alternating current to supply the alternating current to the permanent magnet motor, the drive circuit having at least one arm including two series connected first switching elements having flywheel diodes respectively, the drive circuit having an input terminal connected to a capacitor and an output terminal connected to the permanent magnet motor, a chopper circuit including a plurality of series connected second switching elements having diodes connected in parallel with the second switching elements respectively, the chopper circuit being disposed at the battery side and connected in parallel with the capacitor, a reactor connected between a neutral point of the chopper circuit and the battery, and a control for controlling the switching elements of the drive circuit and chopper circuit so that the switching elements are turned on and off.