Stator of wheel hub motor for electric vehicle

Abstract

The invention relates to a stator of a wheel hub motor for an electric vehicle, which comprises an iron core and support, wherein the iron core is composed of tooth ribs, a yoke part and tooth grooves, the iron core is arranged on the outer side of the support, at least three Hall grooves are formed in the end part of the same side of the iron core, the three Hall grooves are located on the toothribs of the iron core and are distributed in a circumferential manner, the symmetrical center lines of the three Hall grooves are intersected in pairs, the symmetrical center line of the middle Hall groove in the three Hall grooves and the symmetrical center lines of the Hall grooves located on the two sides of the middle Hall groove form an included angle [alpha] and an included angle [beta] respectively, the number of tooth grooves of the iron core is 48, the included angle [alpha] ranges from 22 degrees to 26 degrees, and the included angle [beta] ranges from 36 degrees to 40 degrees. The stator has the advantages that the tooth groove structure is optimized, the position of each Hall groove is reasonably arranged, the precision of a motor commutation point is improved, the problem thata groove opening Hall is difficult to install and prone to deviation is solved, the stator adapts to a single-wire multi-turn winding process, a magnetic circuit is optimized, the motor efficiency isimproved, a groove wedge is removed, and the stator groove utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a stator of a hub motor for electric vehicles. Background technique [0002] Nowadays, as people's pace of life is getting faster and faster, urban traffic congestion is becoming more and more serious, so electric vehicles are favored as a green means of transportation. After years of development, the electric vehicle market has become more and more saturated, and as the market competition has become increasingly fierce, electric vehicles have gone from initially meeting functional requirements to pursuing performance excellence and riding comfort, so that they are increasingly pursuing complete vehicles. The price / performance ratio of the hub motor, as the main accessory of the electric vehicle, its cost performance has also become an important indicator considered by the major electric vehicle manufacturers. The size of the noise has become the standard for custome...

AI Technical Summary

Problems solved by technology

[0004] In today's market, the stator winding method of the in-wheel motor applied to the electric vehicle adopts the multi-strand multi-turn winding process. Due to the multi-strand winding process of this type of winding process, the winding of the enameled wire is relatively messy and loose, and the notch Slot wedges are required to block the leakage of enameled wires, causing the stator and rotor to rotate and interfere with each other, resulting in motor failure and damage. This structure does not have a high utilization rate of the stator slot.

Moreover, in order to shorten the circumferential span of the Hall slot of the traditional hub motor, the Hall slot is usually placed at the tooth slot. The installation of the Hall at this position is difficult, and the installation is easy to loosen, the deviation is large, and it is easy to install. Dropped, it is in direct contact with the enameled wire, the temperature of the contact environment is higher than that of the Hall installed on the rib, and it is easy to be damaged by high temperature

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