Rotor punching sheet, rotor, motor and new energy electric vehicle

Abstract

The invention provides a rotor punching sheet, a rotor, a motor and a new energy electric vehicle, relates to the technical field of motors, and solves the technical problem of high noise of the motor. The rotor punching sheet comprises a punching sheet body, multiple groups of magnetic steel grooves arranged on the punching sheet body and de-weight holes arranged on the punching sheet body, wherein a first magnetic isolation bridge is arranged between the magnetic steel groove and the rotor outer ring, and the radial dimension L1 of the first magnetic isolation bridge is greater than or equal to 2.6 mm and less than or equal to 3mm. The rotor comprises a plurality of rotor punching sheets, all the rotor punching sheets are arranged in a laminated manner, and the rotor also comprises magnetic steel arranged in the magnetic steel grooves. The motor comprises a stator assembly and a rotor arranged in the stator assembly, wherein the stator assembly comprises a shell and a stator, and the shell is fixed to the outer side of the stator in an interference fit mode; and the shell comprises a first shell and a second shell which are arranged inside and outside, and a cooling water channel is arranged in the first shell and/or the second shell. The motor has the characteristics of high overall rigidity of the rotor and high elliptical modal frequency, and the noise and vibration of the motor are small.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor punch, a rotor, a motor and a new energy electric vehicle. Background technique [0002] With the introduction of the national "carbon neutral" policy, new energy vehicles are bound to become an inevitable trend in the development of modern transportation. New energy vehicles use power batteries as the main driving energy, are driven by motors, do not need to consume fuel, and achieve zero pollutant emissions. Although electric vehicles do not have the noise of the traditional power system, there is unique noise and vibration of the drive motor. At present, new energy vehicles are facing several major industry problems, and noise and vibration are two important problems that need to be solved urgently. When the new energy vehicle is running, the permanent magnet synchronous motor rotates at high speed, and is affected by its own cogging torque, electromagnetic force and ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rotor punch, a rotor, a motor and a new energy tram to solve the technical problem of high motor noise in the prior art

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