Patent ID: 7211913
Filing Date: 2007-05-01
Classification: B60K,B60L,B60W,F01P,H02K,Y02T

Abstract:
1. A motor cooling system for cooling a three-phase alternating current motor mounted on a vehicle as a traction motor where oil is introduced as cooling oil from driving-related equipment of said vehicle, wherein said traction motor comprises a stator having a neutral point, wherein said vehicle is in a high-load driving state when a larger load is applied to said traction motor than a predetermined amount, wherein, when said vehicle is in the high-load driving state, said neutral point contacts said cooling oil with a larger contact amount than when said vehicle is not in said high-load driving state; said system comprising an oil puddle having an oil level that changes from a normal oil level to a high-load oil level when said vehicle transits from not the high-load driving state to the high-load driving state, wherein at least a part of said neutral point is positioned between said normal oil level and said high-load oil level.