Modular stator structure, design method and homopolar and same-slot permanent magnet motor

Abstract

The invention discloses a modular stator structure which is used for a homopolar and same-slot permanent magnet motor. The modular stator structure comprises stator tooth parts and an annular stator yoke part, the inner circumferential surface of the stator yoke part is provided with a plurality of assembly slots along the circumferential direction, and each assembly slot is internally and detachably provided with one stator tooth part. The same-pole and same-slot permanent magnet motor adopts different pole slots for cooperation, slot pitch angles of each type of pole slots are different, but the slot pitch angles are integral multiples of slot included angles of virtual positioning slots uniformly and annularly distributed on the inner circumferential surface of a stator yoke part, the number of the virtual positioning grooves is the product of the number of pole pairs of the same-pole and same-groove permanent magnet motor and the number of assembling grooves. The invention further discloses a design method of the modular stator structure and a homopolar and same-slot permanent magnet motor comprising the modular stator structure. According to the invention, different slot pitch angles can be realized on the same stator yoke part by selecting the number of the virtual positioning slots uniformly distributed on the stator yoke part.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a modular stator structure, a design method and a permanent magnet motor with the same pole and the same slot. Background technique [0002] As a new type of topological motor, the same pole and same slot permanent magnet motor has lower power supply frequency and iron loss, higher efficiency, and has shorter ends and smaller volume compared with fewer poles and more slots. The moment density is higher. In addition, its back electromotive force waveform is easier to sinusoidal, which is beneficial to reduce load torque fluctuations. However, the stator of the motor with the same pole and the same slot is a combination of many poles and few slots and few poles and multiple slots. For example, a patent specification with a publication number of CN111193336A discloses a few-slot multi-pole permanent magnet fault-tolerant rim propulsion motor. The specific scheme includes: A stator ...

AI Technical Summary

Problems solved by technology

[0003] For the above two types of motors, because the motors with the same pole and the same slot have two or more slot pitch angles, it increases the difficulty of processing the stator core and the difficulty of winding.

In addition, when the slot pitch angle is small, the difficulty of winding the wire is greatly increased, and the slot fill rate of the motor will also be affected

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