PURPOSE: To cool the rotating machine of an electrical controller within a housing appropriately by providing a finned heat pipe in a protruding state outside a housing nearest to a stator part coil.
CONSTITUTION: A hole 2a is bored through the outer peripheral part of a flywheel housing 2 and a hole 11a is formed in the vicinity of a stator core 11 from the outer periphery of the stator core 11 to its inside. On the other hand, a heat pipe 21, is provided where a fin 21b is attached to the heat dissipation end of a pipe 21a and the intermediate of the same pipe 11a is provided with a mounting flange 21c. The heating end of this heat pipe 21 is inserted from the outside of the housing 2 through the hole 2a into the inside of the housing and then into the hole 11a of the stator core 11. Also, the fin 21b of the heat pipe 21 is provided in a protruding state outside the housing 2. These heat pipes 21 are arranged radially on the circumference of the stator core 11. Thus, the rotating machine of an electrical controller to be accommodated within a sealed housing can be cooled satisfactorily.
SUZUKI TAKAYUKI
OBATA ATSUMI
