Disc type axial magnetic flux electric motor

Abstract

The invention relates to a disc type axial magnetic flux electric motor. The disc type axial magnetic flux electric motor comprises an annular machine shell, a stator, a first rotor, a second rotor and a rotary shaft; the improvement lies in that the stator adopts a magnet yoke-free segmental structure and consists of 12 or more stator units in an even number; the first rotor and the second rotoradopt the same structure and both adopt an improved dual-layer Halbach structure; the 12 or more stator units in an even number are corresponding to six or more groups of first permanent magnets in aneven number and six or more groups of second permanent magnets in an even number in a one-to-one correspondence manner; the axially corresponding first permanent magnets and second permanent magnetsare opposite in polarities; equivalently, when the first permanent magnets are in N poles, the axially corresponding second permanent magnets are in S poles, and vice versa; the magnetic flux direction is the axial direction; and the power density parameter is 5-6Kg / Kw calculated based on the rate power. By virtue of the disc type axial magnetic flux electric motor, the motor quality is lowered while the motor power is increased, so that the motor power density is increased, cost is lowered and higher performance requirement is satisfied.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to an axial permanent magnet motor. Background technique [0002] The key to the motor technology used in electric vehicles and electric aircraft is high specific power and large output power. Due to structural constraints, the existing traditional motors have very low power density under high power conditions and cannot meet the high power density requirements of electric vehicles and electric aircraft. Therefore, they encounter bottlenecks in motor design. Rare earth permanent magnet motors, AC synchronous motors and switched reluctance motors are the main development directions. Rare-earth permanent magnet motors have the highest efficiency among all motors, because permanent magnets are used for excitation, and there is no power consumption; their high magnetic flux density results in high torque, which enables the motor to be small in size and light in weight. [0...

AI Technical Summary

Problems solved by technology

The world's first motor invented by Faraday is the axial motor. Due to the limitation of materials and technology level, the axial permanent magnet motor has not been further developed for a long period of time.

With the advancement of science and technology, the emergence of new materials and structures, and the improvement of technological levels, the problems of low power density, low core utilization and difficult cooling of traditional cylindrical motors can all be found in axial permanent magnet motors. Answer

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