A Flux Controllable Axial Field Hybrid Permanent Magnet Memory Motor

Abstract

The invention discloses a magnetic flux controllable axial magnetic field mixed hybrid permanent magnet memory motor comprising two rotor discs, a stator and an installation shaft. NdFeB permanent magnets and iron core poles, which are arrayed in inner and outer circles at intervals alternately, are bonded to the inner surfaces of the rotor discs; the NdFeB permanent magnets are magnetized axially, the polarities of the NdFeB permanent magnets of the outer circle are the same, the polarities of the NdFeB permanent magnets of the inner circle are opposite to those of the NdFeB permanent magnets of the outer circle, and the magnetizing directions of the NdFeB permanent magnets arranged in corresponded positions of two rotor discs are the same; the stator comprises a stator iron core, a three-phase armature winding and a single-phase pulse winding. The motor has high power density and wide rotating speed operation range and is adaptive to relevant drive occasions of low axial size requirements, compacted structure and flux weakening requirements.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to an axial magnetic field hybrid permanent magnet memory motor with controllable magnetic flux. 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 axia...

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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

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