Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2008-03-28
2011-12-13
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S216069
Reexamination Certificate
active
08076805
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.
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Fujita Masafumi
Kabata Yasuo
Kakiuchi Mikio
Katayama Hitoshi
Matsuyama Koji
Desai Naishadh
Kabushiki Kaisha Toshiba
Nguyen Tran
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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