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:
Apr. 18, 2006
Filed:
Apr. 12, 2004
Masahiro Kobayashi, Tokyo, JP;
Hiroyuki Kujirai, Tokyo, JP;
Takanobu Koyama, Tokyo, JP;
Nao Aoki, Tokyo, JP;
Masahiro Kobayashi, Tokyo, JP;
Hiroyuki Kujirai, Tokyo, JP;
Takanobu Koyama, Tokyo, JP;
Nao Aoki, Tokyo, JP;
Minebea Co., Ltd., Kitasaku-Gun, JP;
Abstract
A variable reluctance resolver has a rotor which includes a noncircular core and which is rotatably supported inside a stator with a gap therebetween. The shape of the rotor is such that the gap permeance, which is based on the gap, varies according to a sine function of the rotational angle. Each of the salient poles of the rotor has an outer periphery comprising an arc of radius r centered on a point which is offset from the center of the rotor by a prescribed offset distance. The outer periphery of each salient pole does not extend to the inner periphery of the stator.