Liquid cooling structure of rotating electric machine
Provided is a liquid cooling structure of a rotating electric machine, which is capable of suppressing the reduction of cooling efficiency even with a coil using a flat lead wire. Guide block walls 12 Ac are provided on both sides in the width direction of a bobbin 12 along the axial direction of a stator 10 so as to position each between adjacent teeth portions 11 b in the circumferential direction of a stator core 11 of the stator. A gap is formed between the coil 13 and the guide block wall 12 Ac, and the guide block walls 12 Ac are positioned adjacent to each other so as to make a closing between the guide block walls 12 Ac of adjacent bobbins 12.
1. A rotating electric machine with a liquid cooling structure for cooling coils of a stator thereof, the stator comprising:
an annular stator core having a yoke portion and teeth portions that are projectingly formed in a first circumferential direction of an inner periphery of the yoke portion;
bobbins that are respectively attached to the teeth portions; and
coils that are respectively mounted on the bobbins,
wherein the liquid cooling structure is configured to cool the coils by supplying a cooling liquid in an axial direction of the stator toward between adjacent teeth portions of the stator,
wherein guide block walls are provided on both sides in a width direction of each of the bobbins along the axial direction of the stator so as to position each between the adjacent teeth portions in a second circumferential direction of the stator,
wherein a gap is formed between each of the coils and each of the guide block walls,
wherein the guide block walls are positioned adjacent to each other so as to make a closing between the guide block walls of adjacent bobbins, and
wherein a surface of each of the guide block walls making the closing, which is positioned outside in the second circumferential direction of the stator, is taperingly inclined such that a thickness of each of the guide block walls in the second circumferential direction of the stator becomes thicker from an inner side toward an outer side in a radial direction of the stator.
2. The rotating electric machine as claimed in claim 1 , wherein each of the coils is formed of a flat lead wire having a rectangular cross section.