| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration of insulation properties at a predetermined voltage section, in a cooler of a predetermined unit including a cooler having a base plate in which a groove for coolant passage is formed, and a predetermined voltage section.SOLUTION: A cooler 20 has a base plate 22 having a coolant passage groove 26 formed in the upper surface 23, and arranged to incline in the longitudinal direction, and a seal member 28 arranged on the outer peripheral side of the coolant passage groove 26 in the base plate 22. A high voltage part 40 is arranged on the lower surface 24 side of the base plate 22, on the lower side than the passage groove 26 in the inclination direction (longitudinal direction) and on one end side in the transverse direction. On the upper surface of the base plate 22, on the lower side of the passage groove 26 in the inclination direction (longitudinal direction), a groove 30 is formed from one end in the transverse direction toward the other end (remote side from the high voltage part 40), so as to extend in the lower side in the inclination direction.SELECTED DRAWING: Figure 2 |
