Segmented skewed slot stator assembly and flat wire motor

Abstract

The invention relates to a segmented skewed slot stator assembly and an oil cooling motor. A segmented skewed slot stator assembly comprises a stator iron core section, a connecting assembly and a flat wire winding, the flat wire winding comprises a winding section A with a hairpin-shaped end part, a straight-strip-shaped winding section B and a connecting winding section C, the winding section A is connected through N winding sections B and N + 1 winding sections C, N is a natural number, the winding sections A and B respectively penetrate through first through slots of the stator iron core section, and the winding sections A and B respectively penetrate through second through slots of the stator iron core section. The winding section C is arranged in the second through groove in the connecting assembly, the end of the winding section C is lower than or flush with the end face of the connecting assembly, and the two connecting parts are staggered by an angle in the circumferential direction to form a skewed slot effect. A radial oil channel is designed in the connecting assembly, and the stator core is provided with axial oil cooling channels at the yoke part and the notch. Therefore, through the combination of the winding segments, the flat wire motor platform can be expanded and applied conveniently, harmonic waves can be weakened by segmented skewed slots, and meanwhile, the temperature rise of the motor can be effectively improved through notch oil cooling.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous drive motors for new energy vehicles, and more specifically relates to a segmented chute stator assembly and a flat wire motor. Background technique [0002] New energy vehicles require high motor speed and high torque to meet good starting or climbing ability and high vehicle speed, and permanent magnet synchronous drive motors are widely used in new energy vehicles due to their good speed regulation ability and high torque density. Widely used; on the other hand, due to the limited space and strict weight requirements of passenger cars, the power density of motors is constantly improving, so flat wire winding technology is widely used. [0003] At present, new energy motor manufacturers are actively deploying and developing stator flat copper wire winding technology. This technology can better improve the temperature of motor stator winding due to its high slot fill rate. H...

AI Technical Summary

Problems solved by technology

Rotor slant poles mainly weaken tooth harmonics by adjusting the number of rotor segments and the angle of the slant poles. However, the segmented slant poles of the rotor bring many unfavorable factors to production control, making it difficult to achieve a very ideal effect; the stator chute can also effectively reduce the Harmonic components, but the process is relatively more difficult and less used

[0005] High-speed motors for new energy vehicles are one of the current development trends, and the AC effect of the windings and the eddy current effect of the rotor magnets brought about by high speeds will worsen the heat dissipation of the motors, so various complex cooling effects such as oil cooling have gradually been proposed and applications, but most of these cooling systems either only surface-cool the ends of the windings, or only provide indirect cooling by other means, so the most critical slot conductors and rotor surfaces cannot be cooled optimally

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