Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Rotating electric machine with rotor cooling slots
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.
Kabushiki Kaisha Toshiba
H H H
H02K H02K H02K
inventional additional additional
Koji Yoshiyuki Hitoshi Mikio Yasuo Masafumi Mikio
Matsuyama Shimoda Katayama Takabatake Kabata Fujita Kakiuchi