Rotating motor punching sheet and rotor

Abstract

The invention discloses a rotating motor punching sheet and a rotor. The rotor punching sheet comprises a punching sheet body, wherein a plurality of magnetic poles distributed in the circumferential direction are arranged on the punching sheet body; each magnetic pole comprises a pair of first magnetic steel grooves and a pair of second magnetic steel grooves, the pair of first magnetic steel grooves and the pair of second magnetic steel grooves are symmetrically distributed about the center line of the D axis of the magnetic pole, and the mutual distance between the first magnetic steel grooves and the mutual distance between the second magnetic steel grooves are widened along the center line of the D-axis of the magnetic pole to the outer circumference of the punching sheet; a through hole which is symmetrical about the center line of the D-axis of the magnetic pole is formed between the two second magnetic steel grooves in a pair; a lightening hole is formed between the region between every two adjacent magnetic poles and the inner circle of the punching sheet; a positioning hole is formed between every two adjacent lightening holes; and an inner ring and an outer ring of riveting points are distributed on the punching sheet body. According to the rotating motor punching sheet and the rotor, starting from the magnetic circuit design of the rotor punching sheet, a magnetic circuit structure which is approximately in a double-V shape is adopted, a high salient pole ratio is obtained through an optimized V-shaped included angle, and high performance of the permanent magnet motor is realized.

Description

technical field [0001] The invention relates to a motor, in particular to a punching plate and a rotor of a rotary motor. Background technique [0002] At present, new energy vehicle drive motors are developing towards high speed and high power density. In order to achieve high speed, magnetic bridge structures are added to both sides of the magnetic steel of traditional built-in permanent magnet motors to improve the strength of the rotor. The higher the speed, the wider the width of the magnetic bridge. Big. [0003] In the existing scheme, the method of adding a magnetic bridge on both sides of the magnetic steel to achieve high speed will seriously affect the performance of the motor: the magnetic bridge is made of silicon steel sheet, which is a good magnetic material. On the one hand, it increases the magnetic flux leakage of the permanent magnetic field. The permanent magnet torque is reduced, and on the other hand, the reluctance of the D-axis magnetic circuit is re...

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Problems solved by technology

[0003] In the existing scheme, the method of adding a magnetic bridge on both sides of the magnetic steel to achieve high speed will seriously affect the performance of the motor: the magnetic bridge is made of silicon steel sheet, which is a good magnetic material. On the one hand, it increases the magnetic flux leakage of the permanent magnetic field. The permanent magnet torque is reduced, and on the other hand, the reluctance of the D-axis magnetic circuit is reduced to reduce the reluctance torque; the addition of a magnetic bridge will inevitably bring about a decline in motor performance, and it is difficult to achieve high power density

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