High-power-density and high-efficiency permanent magnet synchronous motor for electric aircraft

Abstract

A high-efficiency and high-power-density permanent magnet synchronous motor for an electric aircraft comprises a stator iron core, a stator winding, a permanent magnet, a rotor iron core, a rotor support, a rotating shaft, a front bearing, a rear bearing, a machine shell and a rear end cover; light weight of the motor is achieved by increasing the inner diameter of a motor stator and reducing the axial length; the motor stator winding adopts a fractional slot and concentrated double-layer winding structure, so that the winding end size is reduced; the stator iron core adopts an ultrathin silicon steel sheet; the rotating shaft adopts a hollow shaft structure to reduce weight; the rotor bracket adopts a spoke-shaped structure, so that the weight of the rotor is reduced; the rotating shaft, the rotor support and the rotor iron core are sequentially connected together in a key groove fit mode from inside to outside. The permanent magnets are axially segmented, so that eddy-current loss is reduced, and motor efficiency is improved; the outer side of the casing adopts a radiating fin structure, so that the weight is effectively reduced while the radiating capability of the motor is ensured; and the end cover and the components are packaged together, so the performance requirements of high power density and high efficiency of the driving motor of the electric aircraft are met.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor with high efficiency and high power density for electric aircraft. Background technique [0002] With the development of power electronics technology, new ferromagnetic materials, and permanent magnet materials, permanent magnet synchronous motors have gradually become an important development direction for electric aircraft drive motors due to their advantages of high efficiency, high power density, and high reliability. [0003] The electric propulsion technology is driven by a permanent magnet synchronous motor to provide part or all of the flight thrust for the aircraft, effectively solving the noise and pollution emission problems caused by the traditional aircraft propulsion system. As the core component of electric aircraft, the performance of permanent magnet synchronous motor directly determines the power, ...

AI Technical Summary

Problems solved by technology

[0004] However, the outstanding contradiction of traditional electric aircraft drive motors is that they cannot balance high power density and high efficiency

The torque generated by the motor per unit weight is limited by the electromagnetic load and geometric structure. Increasing the power density of the motor will lead to an increase in the magnetic load and thermal load, thereby restricting the improvement of motor efficiency and putting a test on the heat dissipation capacity of the motor, which will seriously affect Electric Aircraft Drive Motor Performance

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