| 摘要 |
PROBLEM TO BE SOLVED: To efficiently conduct heat from a coil to a cooling fluid.SOLUTION: A motor 1A includes: a housing 21A; a stator holder 22A; a stator 23A; and a passage 25A of the cooling fluid. The cooling passage 25A is provided between the housing 21A and the stator holder 22A. A coil 231A of the stator 23A is covered by a resin part 233A. A part of heat generated in the coil 231A is absorbed by the cooling fluid in the passage 25A through a holder cylindrical part 221A of the stator holder 22A. Further, another part of the heat generated in the coil 231A is absorbed by the cooling fluid in the passage or is diffused into outer air through the resin part 233A, a holder flat plate part 222A of the stator holder 22A, and the housing 21A. As described above, multiple heat radiation passages are provided between the coil 231A and the passage 25A thereby efficiently conducting the heat from the coil 231A to the passage 25A. |
