Stator of flat wire motor

Abstract

The invention discloses a stator of a flat wire motor. A stator core is provided with a plurality of stator slots according to the law of at least two slots in each polar phase group. A stator windingis composed of hairpin coils. Each hairpin coil includes a hairpin part, embedding parts, bending parts and welding parts. The hairpin coils are embedded into the stator slots through the embedding parts, and 16 embedding parts are embedded into each stator slot. The bending directions of the bending parts of the same hairpin coil are the same. The welding parts of first-layer and 16th-layer conductors in each stator slot are used as single lead-out ends. The welding parts of second-layer to 15th-layer conductors in the same stator slot are grouped in ascending order according to the law of two layers in each group, and the two adjacent welding parts in the same group are welded together. The bending parts of the 16 layers of conductors in the same stator slot are grouped in ascending order according to the law of two layers in each group, and the bending parts in two adjacent groups have opposite bending directions. The winding scheme can reduce the bending difficulty of the bendingparts of the multi-layer hairpin coils and reduce the skin effect caused by the reduction of conductor size and the high speed of the motor.

Description

technical field [0001] The invention relates to the technical field of new energy motors, in particular to a flat wire motor stator. Background technique [0002] Flat wire winding is a development direction of new energy vehicle drive motors, but as the motor speed increases, the disadvantages of flat wire become more obvious. At present, the size of the flat wire winding conductors of the card-issuing flat wire motors used in the market is generally large, which is not conducive to further speeding up the driving motor. If the size of the conductor is further reduced, the influence of the high-speed skin effect can be reduced, but the full rate of the copper slot will be reduced, and the process difficulty of winding manufacturing will be increased, and it is even difficult to realize the end twisting of the welding end of the flat wire winding. Contents of the invention [0003] The technical solution of the present invention is: a flat wire motor stator, including a s...

AI Technical Summary

Problems solved by technology

[0002] Flat wire winding is a development direction of drive motors for new energy vehicles, but as the motor speed increases, the disadvantages of flat wire become more obvious

At present, the size of the flat wire winding conductors of the card-issuing flat wire motors used in the market is generally large, which is not conducive to further high-speed drive motors.

If the size of the conductor is further reduced, the influence of the high-speed skin effect can be reduced, but the full rate of the copper slot will be reduced, and the process difficulty of winding manufacturing will be increased, and it is even difficult to realize the end twisting of the welding end of the flat wire winding

Images