Multi-phase axial flux permanent magnet synchronous motor

Abstract

The invention discloses a multi-phase axial flux permanent magnet synchronous motor, which comprises a rotating assembly, a fixing assembly and a housing. The rotating assembly comprises a rotating member and permanent magnets uniformly distributed and fixed on the rotating member. Half of the number of the permanent magnets is the number p of pole pairs. The fixing assembly comprises a fixing member and a winding. The fixing member is provided with n slots, and the winding is wound on the fixing member through the slots. The phase number m of the winding is greater than or equal to 4, and star-type connection is adopted. The number p of pole pairs, the phase number m and the slot number n satisfies n=m*p. The housing wraps the rotating assembly and the fixing assembly, and the rotating member and the fixing member are aligned with each other. The axial flux permanent magnet synchronous motor provided by the invention adopts an integral-slot multi-phase winding. When any phase of winding in the motor fails, the power of the phase of winding can be cut off, the other phases can still be competent for electric and power generation functions, and the performance will not decline too much. Therefore, the fault tolerance and safety of disk motors are increased.

Description

technical field [0001] The invention relates to the field of motor design and manufacture, in particular to a multi-phase axial flux permanent magnet synchronous motor. Background technique [0002] The overall structure of the axial flux permanent magnet synchronous motor is compact, which is conducive to the improvement of the torque density compared with the radial magnetic field motor. The axial flux permanent magnet synchronous motor has a short axial dimension, a large outer diameter, and a flat body. It is often used in applications where the axial size and volume are limited. Since the axial flux permanent magnet synchronous motor has a flat body, Therefore, it is also called a disc motor. [0003] The main purpose of the disc motor is electric and power generation. The principle of electric power is that the stator winding passes through the alternating current to generate a rotating magnetic field in space and interacts with the magnetic field generated by the rot...

AI Technical Summary

Problems solved by technology

The number of phases of a traditional disc motor is three. When one of the three-phase windings fails, the electric and power generation performance of the motor will be greatly reduced. When two of the three-phase windings fail, the motor will completely lose its electric power.

Therefore, it is of key significance to study the technology of increasing the fault tolerance rate of motors. However, in the prior art, no technology has been proposed to use integer slot multi-phase windings for axial flux permanent magnet synchronous motors to improve the fault tolerance rate of motors.

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