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:
Jan. 28, 1997
Filed:
Sep. 13, 1994
Hirobumi Satomi, Kashiwa, JP;
Takao Iwasa, Kashiwa, JP;
Oriental Motor Co., Ltd., Tokyo, JP;
Abstract
A linear motor includes a stator 1 having an even number N of salient poles 11, 12, . . . disposed at an equal angle pitch and a mover 3 disposed movably in a shaft direction. The salient poles are constituted by pairs of salient poles adjacent to each other and including m sets of salient pole groups composed of (N/2m) sets of salient pole pairs disposed at an angle of (720m/N) degrees. Windings W1, W2, . . . wound on (N/m)-1 or (N/m)-2 salient poles belonging to each of the salient pole groups are connected to have opposite polarities between the pair of salient poles and are connected to have the same polarity between the salient poles which do not constitute the pair of salient poles and are disposed to interpose the salient pole of the other phase therebetween to constitute phase windings for m phases. Remaining salient poles of the salient pole group are caused to detect a position and a movement direction of the mover 3 as sensor poles S.sub.A and S.sub.B.