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. 13, 2011
Filed:
Mar. 28, 2008
Yasuo Kabata, Yokohama, JP;
Masafumi Fujita, Yokohama, JP;
Mikio Takabatake, Yokohama, JP;
Hitoshi Katayama, Yokohama, JP;
Mikio Kakiuchi, Yokohama, JP;
Koji Matsuyama, Yokohama, JP;
Yoshiyuki Shimoda, Fukushima, JP;
Yasuo Kabata, Yokohama, JP;
Masafumi Fujita, Yokohama, JP;
Mikio Takabatake, Yokohama, JP;
Hitoshi Katayama, Yokohama, JP;
Mikio Kakiuchi, Yokohama, JP;
Koji Matsuyama, Yokohama, JP;
Yoshiyuki Shimoda, Fukushima, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils. A depth in a diameter direction of each sub-slot from the rotor coil end to a nearest coil ventilation duct is larger than a depth of the sub-slot at a portion near a center of the rotor core.