Method for reducing heating temperature rise of ultra-high-speed permanent magnet synchronous motor

Abstract

The invention provides a method for reducing heating temperature rise of an ultra-high-speed permanent magnet synchronous motor. The method includes the steps that a plurality of semi-opening stator grooves are evenly machined in a stator iron core, and diphenyl ether fabric swatches are laid at the bottoms of the semi-opening stator grooves; a stator winding is divided into four winding wires, wherein the width of each winding wire is matched with an opening of the corresponding semi-opening stator groove; the four winding wires are sequentially wound around the stator iron core, the four winding wires are divided into an inner layer and an outer layer which are radial in each semi-opening stator groove, and the two winding wires in each layer are arranged side by side; a diphenyl ether fabric swatch is arranged between the inner layer of winding wires and the outer layer of winding wires; a high-permeability groove wedge is installed in the opening of each semi-opening stator groove, and a diphenyl ether fabric swatch is arranged between each high-permeability groove wedge and the corresponding winding wire. According to the method, the semi-opening stator grooves and the high-permeability groove wedges are adopted, magnetic fields of an air gap between a stator and a rotor are evenly distributed, harmonic waves generated by stator notches are reduced, eddy current losses are reduced, temperature rise is reduced, the operation performance of the motor is improved, and the service life of the motor is prolonged.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a method for reducing heat generation and temperature rise of an ultra-high-speed permanent magnet synchronous motor. Background technique [0002] When a conductor moves in a non-uniform magnetic field, the energy loss caused by the induced current in the conductor is called eddy current loss. [0003] After the motor is slotted in the stator, the air-gap magnetic field distribution of the stator and rotor is no longer uniform, and because of the high frequency of the ultra-high-speed permanent magnet synchronous motor, the harmonics generated by the stator slot increase, and the upper pole of the motor rotor is more likely to generate eddy currents The loss will cause the motor to heat up and the temperature will rise, which will have a negative impact on the operating performance and service life of the motor. Contents of the invention [0004] Based on this, aiming at the...

AI Technical Summary

Problems solved by technology

[0003] After the motor is slotted in the stator, the air-gap magnetic field distribution of the stator and rotor is no longer uniform, and because of the high frequency of the ultra-high-speed permanent magnet synchronous motor, the harmonics generated by the stator slot increase, and the upper pole of the motor rotor is more likely to generate eddy currents Loss, resulting in high heat and temperature rise of the motor, which will have a negative impact on the operating performance and service life of the motor

Images