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:
Jul. 31, 2007
Filed:
Oct. 27, 2005
Kazuo Ohnishi, Gunma, JP;
Shoji Ohiwa, Gunma, JP;
Yasuaki Motegi, Gunma, JP;
Yuji Enomoto, Ibaraki, JP;
Kazuo Ohnishi, Gunma, JP;
Shoji Ohiwa, Gunma, JP;
Yasuaki Motegi, Gunma, JP;
Yuji Enomoto, Ibaraki, JP;
Japan Servo Co., Ltd., Tokyo, JP;
Abstract
A two-phase or three-phase claw-pole type rotary machine comprises two or three coaxially arranged single phase rotary machine elements. Each of the rotary machine elements has a magnet rotor, a claw-pole type stator, and an annular stator winding. Claw poles of the stator are divided into a plurality of blocks and are circumferentially separated from one another. A distance between adjacent claw poles of the same polarity in each block is (β−Δβ), substantially, where βis a reference pitch when the claw poles of the same polarity are arranged equidistantly apart from one another in a range of 360°, Δβ is π/2q, or π/3q and q is a number of claw poles of the same polarity in each block. The first and second rotary machine elements are circumferentially shifted from each other by 90° or 120°.