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:
Dec. 17, 2002
Filed:
Apr. 06, 2001
Keijiro Sakai, Kanasagou-machi, JP;
Toshiaki Okuyama, Tokai-mura, JP;
Kinya Nakatsu, Hitachi, JP;
Seiji Ishida, Hitachi, JP;
Hiroshi Fujii, Chiba, JP;
Junji Kato, Narashino, JP;
Masahiro Hiraga, Yotsukaido, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An inverter device has a three-phase inverter for converting DC electric power into AC power for supplement to an AC electric motor and a control device operatively associated therewith, and the control device includes a phase current detection section for outputting a phase current waveform based on a DC input current and an operational processor section for performing operational processing for control of said inverter device based on the phase current waveform. Thereby, the inverter device can be constructed to be very compact.