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:
Mar. 26, 2013
Filed:
Aug. 05, 2010
Satoshi Kikuchi, Tokai, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Tomio Yoshikawa, Mishima, JP;
Baiying Huang, Shizuoka, JP;
Hideyuki Kumakura, Shizuoka, JP;
Satoshi Kikuchi, Tokai, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Tomio Yoshikawa, Mishima, JP;
Baiying Huang, Shizuoka, JP;
Hideyuki Kumakura, Shizuoka, JP;
Hitachi Appliances, Inc., Tokyo, JP;
Abstract
There is provided a self-starting permanent magnet synchronous motor in which a center axis of magnetic poles of a rotor is assumed to be a d axis, an axis deviated from the magnetic pole center axis by an electric angle of 90 degrees is assumed to be a q axis, at least two or more starting bars which are arranged near the d axis are arranged on a bore side of the bars near the q axis and are arranged in parallel with the q axis, so that a stable starting torque can be generated irrespective of a generating position of a stator magnetic flux which changes due to applying timing of a power source and a phase of a voltage, and a vibration/noises at the time of a stationary operation can be reduced.