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:
Feb. 15, 2011
Filed:
Sep. 05, 2006
Hiroshi Kaneshige, Tokyo, JP;
Taro Miyamoto, Tokyo, JP;
Akihiro Unno, Tokyo, JP;
THK Co., Ltd., Tokyo, JP;
Abstract
Provided is a linear synchronous motor in which, when a three-phase alternating current passes through a coil of a mover, thrust forces generated by the alternating currents of each phase are equalized, thereby making it possible to minimize variation in thrust force, the linear synchronous motor including: a stator magnet () in which N poles and S poles are alternately arranged linearly; and a mover () which is opposed to the stator magnet () at an interval therefrom, and which generates a shifting magnetic field along with passage of a three-phase alternating current, for applying a thrust force to the stator magnet (), in which: the mover () includes a core member () in which teeth (), the number of which is a whole-number multiple of a number of phases of the alternating currents, are arranged, and a coil () which is wound around the teeth () and through which the alternating current of any one of the phases passes; and of the plurality of teeth () provided to the core member (), the teeth () corresponding to a u phase and a w phase of the alternating currents passing through the coil () wound around the teeth () at both ends of the core member () have distal ends protruding toward the stator magnet () further than distal ends of the residual teeth ().