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:
Dec. 31, 2013
Filed:
Jun. 08, 2009
Yoshinari Asano, Shiga, JP;
Tomomi Sakamoto, Shiga, JP;
Nobuyuki Kifuji, Shiga, JP;
Hirofumi Higashi, Osaka, JP;
Shintarou Araki, Shiga, JP;
Yoshinari Asano, Shiga, JP;
Tomomi Sakamoto, Shiga, JP;
Nobuyuki Kifuji, Shiga, JP;
Hirofumi Higashi, Osaka, JP;
Shintarou Araki, Shiga, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.