| 摘要 |
PURPOSE:To increase the cooling efficiency of a field coil by providing vent passages between a pole core and a field coil, and between the layers of the field coil and providing a partition member between the lower ends of the field coils. CONSTITUTION:A first vent passages 60 are provided between a field core 10 and a field coil 11, a second vent passages 70 are provided between the layers of the field coil 11, and a partition member 22 bridged between the lower ends of the field coil 11 is provided. The pressure of cooling air is enhanced by the member 22 to be flowed to the first passage 60, and the flowing velocity of the cooling air passed through the first and second passages 60, 70 can be accelerated. Further, the ventilating area of the cooling air to the coil 11 via the passage 70 can be remarkably increased. |
