| 摘要 |
PROBLEM TO BE SOLVED: To efficiently cool a coil end part while ensuring insulation between joint parts of the coil end part.SOLUTION: Each piece of insulation paper 30 passes through the outermost peripheral joint parts 32-1 in which outer-peripheral ends are adjacent in a stator circumferential direction. Toward an adjacent circumference in one direction from the outer-peripheral side to the inner-peripheral side, each piece of insulation paper sequentially passes through joint parts (joint parts 32-1, 32-2 and joint parts 32-2, 32-3) in a plurality of parts which are adjacent in a stator radial direction from the outer-peripheral end to an inner-peripheral end. The inner-peripheral end passes through the innermost joint parts 32-3 adjacent in the stator circumferential direction. A refrigerant passage 40 is formed between pieces of insulation paper 30 adjacent in the stator circumferential direction. Flow of cooling oil in the stator radial direction is prevented from being hindered by the insulation paper 30 and a temperature variation in the coil end part is prevented. Accordingly, efficient cooling can be carried out.SELECTED DRAWING: Figure 2 |
