Motor stator winding end connecting structure

Abstract

The invention discloses a motor stator winding end connecting structure, the stator winding is a multi-layer conductor structure, the conductor cross section is a square structure, the connection of end portions between the conductors of different winding layers is achieved through connection blocks, and brazing filling materials are arranged between the connection blocks and the conductors. The connection blocks are employed for direct connection, the process is simple, the performances are improved, and the stability of the conductor connection is ensured through adoption of the brazing.

Description

technical field [0001] The invention relates to a motor stator structure, in particular to a connection structure at the end of the motor stator winding. Background technique [0002] At present, the motor stator technology using square conductors is mainly used in large-scale motor equipment such as wind power generators and hydropower generators. Among the general-purpose vehicles represented by customers, Hairpin supplies the most applications. Among new energy vehicles, hybrid vehicles such as Toyota Prius, Lexus, BMW, and pure electric vehicles such as Leaf and Volt currently use square conductors. Motor made by Hairpin process. [0003] The motor made of square conductor Hairpin process is also a motor with distributed winding process. Generally, the process of square conductor forming, wire insertion, twisting, and welding on the twisted side is adopted. The process of welding on the twisted side requires that each A section of the paint on the welding side of the s...

AI Technical Summary

Problems solved by technology

[0003] The motor made of square conductor Hairpin process is also a motor with distributed winding process. Generally, the process of square conductor forming, wire insertion, twisting, and welding on the twisted side is adopted. The process of welding on the twisted side requires that each A section of the paint on the welding side of the square conductor will come off, which will be accompanied by multiple repeated welding operations. The heat generated during welding will cause damage and peeling off of the insulating paint on the welding side of the conductor. It is necessary to use hot-dipped epoxy resin to strengthen the insulation. , and this process will inevitably lead to the existence of pores or cavities on the surface of the conductor, resulting in a decrease in the performance of the solder insulation end, an increase in the defect rate, and an increase in the complexity of the process and the increase in man-hours for production

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