A preparation method of a high-performance high-speed permanent magnet synchronous motor iron core

Abstract

A method for preparing the iron core of a high-performance high-speed permanent magnet synchronous motor includes selecting materials as follows: adopting high magnetic inductance silicon steel sheetwith magnetic inductance not less than 1.65 T, iron los not more than 2.1 W / Kg, and high-frequency iron loss P1.0 / 400 not more than 15W / Kg as a stator; The rotor is made of silicon steel sheet with magnetic inductance of 0.5 ~ 1.65 T, yield strength of not less than 400 MPa and tensile strength of not less than 500 MPa; Stamping into sheets; The stamping sheets are laminated into stator core and rotor core of different specifications and models, and matched for use. According to the characteristics of the stator and the rotor of the high-speed permanent magnet synchronous motor, by selecting different silicon steel plates to meet the requirements of service performance, and by reasonably arranging stators and rotors of different specifications on the corresponding silicon steel plates, one-off punching and laminating can be carried out, so as to maximize the use of the selected steel plates, and the comprehensive production cost can be reduced.

Description

technical field [0001] The invention relates to a method for preparing a motor, which belongs to a method for preparing an iron core of a synchronous motor, in particular to a method for preparing an iron core for a high-speed permanent magnet synchronous motor. Background technique [0002] As the output of electric vehicles continues to increase, the demand for their core automotive motors is also increasing. Today's automobile motors are developing towards high speed, and almost all of them are permanent magnet synchronous motors, mainly because they have high power density, can save traditional mechanical transmission devices, reduce noise and improve transmission system efficiency, etc. Advantage. [0003] The permanent magnet synchronous motor is different from the traditional induction motor. The rotor of the permanent magnet synchronous motor has permanent magnets as the magnetic field source. Unlike the induction motor, the magnetic field needs to be induced from t...

AI Technical Summary

Problems solved by technology

However, for permanent magnet synchronous motors, if this method is still used to select materials for their stators and rotors, there are unreasonable materials, that is, because the rotor magnetic induction of permanent magnet synchronous motors is only 0.5~1.65T, its main It is to make the mechanical properties of the steel plate meet the requirements, that is, the yield strength is not less than 400MPa, and the tensile strength is not less than 500MPa. If the rotor and the stator use the same high magnetic induction steel plate, it will lead to waste and increase the production cost.

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