Motor, stator assembly and coil winding method thereof

Abstract

The invention discloses a winding method suitable for a stator assembly of a z-slot 2p-grade m-phase motor. The stator assembly comprises a stator iron core and a stator winding, wherein the stator winding is made of flat wires. According to the winding method, a plurality of U-shaped conductor sections are configured and connected, so that a part of a stator groove is wound in the forward direction, then reverse winding is carried out, next, forward winding is carried out on the other part of the stator groove, and then reverse winding is performed circularly. Through the wave winding mode, the flat wire voltage difference between adjacent groove layers in the same groove is smaller than that of an existing scheme, so that the insulation breakdown risk of the motor can be effectively reduced, and the reliability is high.

Description

technical field [0001] The invention relates to the field of motors, in particular to a driving motor suitable for a vehicle, a stator assembly and a coil winding method for winding the same. Background technique [0002] The related art discloses a rotating motor armature connection method, the armature is a wave winding method, from the outermost layer to the innermost layer, and then reverse wave winding to the outermost layer, such as Figure 8 shown. [0003] The inventors of the present application have found that the above-mentioned armature connection and implementation methods in the prior art, from the perspective of manufacturing technology, need to produce many types of flat wire armatures, and both ends of the axial direction need to be welded, resulting in many solder joints ; In addition, in the above-mentioned wave winding method, it is difficult to accurately fix the flat wire after it is offline, the production cost is high, and the manufacturing process is...

AI Technical Summary

Problems solved by technology

[0003] The inventors of the present application have discovered that the above-mentioned armature connection and implementation in the prior art, from the perspective of manufacturing technology, requires the manufacture of many types of flat wire armatures, and welding is required at both ends of the axial direction, resulting in many solder joints ; In addition, in the above-mentioned wave winding method, it is difficult to accurately fix the flat wire after it is offline, the production cost is high, and the manufacturing process is difficult

From the perspective of electrical connection, using the wave winding form in the above-mentioned prior art, the voltage difference between different layers in the same slot is high, and it is easy to break down between layers under high voltage, resulting in a short circuit, thereby causing the motor to fail.

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