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:
Aug. 30, 2005
Filed:
Mar. 27, 2003
Ichiro Oyama, Osaka, JP;
Tomokuni Iijima, Osaka, JP;
Toru Tazawa, Ibaraki, JP;
Kazushige Narazaki, Katano, JP;
Kenichi Suzuki, Daito, JP;
Masaru Nishizono, Kadoma, JP;
Ichiro Oyama, Osaka, JP;
Tomokuni Iijima, Osaka, JP;
Toru Tazawa, Ibaraki, JP;
Kazushige Narazaki, Katano, JP;
Kenichi Suzuki, Daito, JP;
Masaru Nishizono, Kadoma, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An apparatus and method for controlling an electric motor is disclosed. The apparatus includes an instruction inputting section for transmitting an instruction for an electric motor or a control object coupled to said electric motor and a prefilter section for outputting a follow-up instruction value by acting on the instruction. The prefilter section has a prefilter concurrently having characteristics of lowered gain at a prescribed frequency and frequencies in the vicinity thereof, and characteristics of limiting the gain in a high range. An instruction follow-up controlling section provides a controlling instruction follow-up so that a quantity of a state of said electric motor or control object follows the follow-up instruction value.