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:
Nov. 17, 2009
Filed:
Sep. 28, 2005
Kenji Yamada, Kitakyushu, JP;
Akihiko Maemura, Kitakyushu, JP;
Shinya Morimoto, Kitakyushu, JP;
Toru Shikayama, Kitakyushu, JP;
Yoshiyuki Tanaka, Kitakyushu, JP;
Mamoru Takaki, Kitakyushu, JP;
Kenji Yamada, Kitakyushu, JP;
Akihiko Maemura, Kitakyushu, JP;
Shinya Morimoto, Kitakyushu, JP;
Toru Shikayama, Kitakyushu, JP;
Yoshiyuki Tanaka, Kitakyushu, JP;
Mamoru Takaki, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A linear motor system that can extend the stroke of a linear motor, with power saving and at a low cost, is provided. In a linear motor system, constituted by a linear motor, a controllerfor supplying a variable voltage, a winding switching device, for opening and closing phase windingsof individual phases that form a plurality of winding groupsthat are separated in a stroke direction, the winding switching deviceis constituted by a three-phase rectifying member, a semiconductor switch, which is located at both ends on the direct-current output side of the three-phase rectifying member, and a resistor and a capacitor, connected in parallel to the semiconductor switch. For each of the phase windings, which form the plurality of winding groups, separated in the stroke direction, one end is connected to the output end of the controllerand the other end is connected to an alternating-current input side of the three-phase rectifying member of the winding switching device. And by opening or closing the semiconductor switch included in the winding switching device, of the plurality of winding groupsseparated in the stroke direction, only a desired winding groupis excited.