Stator assembly for hairpin winding motor

Abstract

According to one aspect of the invention, a stator assembly for a hairpin winding motor comprises a stator iron core, wherein the stator iron core is provided with a plurality of slots arranged in the circumferential direction, and each slot has a plurality of layers in the radius direction; a plurality of hairpins, wherein the hairpins are in a line shape and are used for being fixed to the slots; and a first bridging unit and a second bridging unit, wherein the first bridging unit and the second bridging unit comprise iron core pattern members and model parts, the iron core pattern members are formed by a plurality of electric members, the plurality of electric members are formed by connection of a plurality of hairpins and can be selectively powered on, the model parts is formed by an insulating material covering the iron core pattern members, the first bridging is combined with the upper side of the stator iron core, the second bridging unit is combined with the lower side of the stator iron core, and two end parts of each hairpin are electrically connected to form a coil. By adopting the stator assembly, the production performance and the assembling performance of the motor are improved, the miniaturization of the motor is facilitated, the material cost is saved, and the motor is lighter.

Description

technical field [0001] The invention relates to a stator assembly, in particular to a stator assembly of a hairpin winding motor in which a plurality of hairpins are inserted and fixed into slots of a stator iron core and sequentially connected to form coil windings of the stator. Background technique [0002] Soaring oil prices and environmental concerns have spurred research into ways to improve vehicle fuel efficiency. For example, there is now an electronic four-wheel drive system (electric4wheeldrive: e-4WD). As we all know, a mechanical four-wheel drive system drives the front wheels through an engine, and transmits the driving force of the engine to the rear wheels through a propeller shaft and a coupling to drive the rear wheels. Electronic 4WD is a way to improve on the traditional mechanical 4WD mentioned above by using an electric motor, with the front wheels driven by the engine and the rear wheels driven by the electric motor. Therefore, the electronic four-wh...

AI Technical Summary

Problems solved by technology

As above, it is inevitable to increase the height of the coil end when the welding part of the coil is secured, so the size of the motor increases accordingly

[0008] In addition, since the insulating coating of the welded coil is damaged, it is necessary to apply an insulator such as epoxy resin to the welded part, and it will take a while for the insulator to harden, so the next process will delay the corresponding time

Images