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. 17, 2009
Filed:
Dec. 09, 2005
Koji Yabe, Tokyo, JP;
Yoshio Takita, Tokyo, JP;
Hayato Yoshino, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo, JP;
Abstract
It is an object to obtain a highly efficient synchronous induction motor by letting the magnetic flux hardly pass in the direction of a q axis without interrupting a magnetic path in the direction of a d axis and by increasing a salient pole difference. A slit next to a shaftis extended towards the shaft along a circumference of the shaftto form an extended part of slit. In addition, a gas vent holeis formed as a slender opening stretched in the direction of d axis, and a slit is projected along the circumference of the gas vent hole. Further, the gas vent holeis formed as a slender opening stretched in the direction which is displaced by a predetermined angle from the d axis. Yet further, a rotor iron coreis formed by a plurality of rotor iron core portions in the laminating direction, and the rotor iron core portions have different shapes of slits, respectively.