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:
May. 13, 2008
Filed:
Jan. 12, 2007
Kenji Sasaki, Kadoma, JP;
Teruo Tamura, Ikoma, JP;
Michihiro Yoshida, Takefu, JP;
Toru Takimoto, Takefu, JP;
Hideyuki Taniguchi, Takefu, JP;
Hiroyuki Uesaka, Takefu, JP;
Kenji Sasaki, Kadoma, JP;
Teruo Tamura, Ikoma, JP;
Michihiro Yoshida, Takefu, JP;
Toru Takimoto, Takefu, JP;
Hideyuki Taniguchi, Takefu, JP;
Hiroyuki Uesaka, Takefu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Matsushita Refrigeration Company, Osaka, JP;
Abstract
A synchronous motor includes a stator, a rotor and permanent magnets. The rotor includes a rotor iron core that is rotatable relative to the stator, and conductor bars accommodated within corresponding slots in the rotor iron core. The conductor bars have their opposite ends short-circuited by respective shortcircuit rings to form a starter cage conductor. The rotor also has a plurality of magnet retaining holes defined therein, in which permanent magnets are embedded. The conductor bar holes are positioned in an axial direction and inwardly from the magnet retaining holes. The conductor bars within the holes protrude outwardly from an axial end of the rotor iron core to form projections for securing an end plate to the end of the rotor iron core, the end plate comprising a non-magnetizable material.