A halbach magnetic concentration type axial magnetic field hybrid permanent magnet memory motor

Abstract

The invention discloses a Halbach magnetic-gathering axial magnetic field mixed permanent-magnetic memory motor which comprises a first stator disc, a second stator disc and a rotor disc arranged between the first stator disc and the second stator disc. An air gap is formed between the stator disc and the rotor disc which are coaxially mounted on a mounting shaft, the mounting shaft is fixed on a motor shell through a bearing, the first stator disc is composed of a stator iron core and a triphase armature winding, the stator iron core comprises a stator yoke and stator teeth, a stator groove is formed between each two adjacent stator teeth, and the triphase armature winding is wound on the stator teeth; the second stator disc is a bilayer Halbach composite array and is divided into an upper layer and a lower layer, the lower layer is formed by arranging multiple iron core blocks and multiple neodymium iron boron permanent magnets at intervals, each two adjacent neodymium iron boron permanent magnets is opposite in magnetizing direction, the upper layer close to the air gap is composed of multiple aluminum nickel cobalt permanent magnets and multiple pulse exciting windings in end-to-end serial connection, each two adjacent aluminum nickel cobalt permanent magnets are opposite in magnetizing direction, a spacing groove is formed between each two adjacent aluminum nickel cobalt permanent magnets, and the pulse exciting windings are wound on the aluminum nickel cobalt permanent magnets.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a Halbach magnetic concentration type axial magnetic field hybrid permanent magnet memory motor. Background technique [0002] With the continuous improvement of the performance of rare earth permanent magnet materials, permanent magnet motors characterized by high efficiency and high power density have developed rapidly, and have been widely used in many industrial fields such as aviation, aerospace, and automobiles. Among all kinds of permanent magnet motors, axial field permanent magnet motors, also known as disc motors, not only have the characteristics of short axial size, small size, and compact structure, but also because of their high torque density and high efficiency, It has obvious advantages in many special applications and has become a research hotspot. It is mainly used in motion control, especially suitable for direct drive applications with small axial size requi...

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Problems solved by technology

[0005] Lin Heyun of Southeast University proposed a surface-mounted permanent magnet memory motor with axial magnetic flux switching. Although the motor can adjust the air gap magnetic field by applying different currents to the single-phase pulse winding, the motor is only AlNiCo permanent magnets with relatively low coercive force are used, and the maximum air gap flux of the motor is difficult to reach the level of NdFeB permanent magnet motors, and the power index of the motor is not satisfactory; or in order to obtain sufficient flux , a thicker permanent magnet material must be used, and the magnetization and demagnetization fluxes pass through the air gap of the motor, which leads to a larger magnetomotive force of the magnetic modulation pulse and increases the winding capacity

[0006] Lin Mingyao from Southeast University proposed a dual-stator axial magnetic flux switching type hybrid permanent magnet memory motor. Although the motor can effectively adjust the air gap magnetic field, the armature winding, single-phase pulse excitation winding and permanent magnet are all Arranged on the same stator plate, not only increases the coupling between the two windings, but also is not conducive to the heat dissipation of the armature winding

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