Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor

Abstract

The invention discloses a Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor which comprises a stator iron-core-free armature disc, a permanent magnet, a rotor disc, a shaft, a bearing and a rotor outer shell, wherein two symmetrical rotor discs are arranged at two sides of the stator iron-core-free armature disc; the stator iron-core-free armature disc and the rotor disc are installed on the shaft; the shaft is installed in the rotor outer shell through the bearing; the permanent magnet is pasted on the rotor disc, and is pasted on the inner surface of the rotor outer shell; a Halbach magnet structure with axial magnetizing and tangential magnetizing is adopted for the permanent magnet, and an enclosed magnetic circuit is formed automatically; and a soft magnetic material is placed at the middle of the permanent magnet with tangential magnetizing. According to the invention, on the basis that more permanent magnets are not used, flux density with great air clearance can be obtained, and are is in sine distribution; the output torque is high; the torque density is large; the efficiency is high; the structure is simple; the assembly is simple; and the Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor is suitable for relevant driving occasions with compact structures for electric automobile hub motors and the like.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a coreless axial magnetic field brushless DC motor based on a Halbach structure. Background technique [0002] Environmental pollution and energy shortage are important issues in today's world, which are related to the improvement of human living environment. With the rapid development of the automobile society, environmental problems such as air pollution within cities and global carbon dioxide emissions have attracted widespread attention. In order to solve the above problems, research and development of energy-saving, environment-friendly and safe vehicles is the only way to achieve sustainable development. Among them, electric vehicles have attracted much attention due to their advantages in low pollution, high fuel economy, high efficiency, and flexibility in driving. In the field of electric vehicles, the structure of direct drive system using in-wheel motors has increasin...

AI Technical Summary

Problems solved by technology

In the existing axial magnetic coreless permanent magnet motor based on the Halbach structure, in order to obtain a sinusoidally distributed air gap flux density, the magnetization directions of the Halbach array permanent magnets must be varied, which will inevitably increase the manufacturing cost of the permanent magnets, thereby increasing the overall motor capacity. cost, reducing the cost performance

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