Patent ID: 9112391
Filing Date: 2015-08-18
Classification: B60L,H02K,Y02T

Abstract:
1. A motor cooling device, which is adapted to withdraw heat of a stator through fluid flowing around an end portion of a coil of the stator, comprising: a coil end cover that covers the end portion of the coil; a flow path for letting through heat transfer fluid, that is formed between an outer face of an end portion of the coil and an inner face of the coil end cover; and a flow rate adjusting means that changes a cross-sectional area of the flow path by moving the coil end cover toward the end portion of the coil or away from the end portion of the coil; wherein the flow rate adjusting means widens the cross-sectional area of the flow path with an increment of the heat transfer fluid supplied to the flow path, and narrows the cross-sectional area of the flow path with a reduction of the heat transfer fluid supplied to the flow path.