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:
Feb. 22, 2011
Filed:
May. 27, 2008
Masafumi Fujita, Yokohama, JP;
Tadashi Tokumasu, Tokyo, JP;
Yasuo Kabata, Yokohama, JP;
Mikio Kakiuchi, Yokohama, JP;
Masanori Arata, Yokohama, JP;
Takashi Ueda, Yokohama, JP;
Masafumi Fujita, Yokohama, JP;
Tadashi Tokumasu, Tokyo, JP;
Yasuo Kabata, Yokohama, JP;
Mikio Kakiuchi, Yokohama, JP;
Masanori Arata, Yokohama, JP;
Takashi Ueda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The depth from the open end of a rotor slot closest to a magnetic pole of a rotary core to a slot bottom or the bottom of a subslot provided as a coolant ventilation path on a rotor slot bottom is made less than the depth of slots at and after a second slot counted from the magnetic pole side in the direction of internal circumference, and when a shortest distance between the bottoms of the rotor slots opposed to each other through a magnetic pole or a shortest distance between the bottoms of the subslots is assumed to be a magnetic pole width of the slots, a magnetic pole width Wpof a slot closest to the magnetic pole side is set to 85% or more of a magnetic pole width Wpof a second slot counted from the magnetic pole side in the direction of internal circumference.