A Composite Excitation Amorphous Alloy Axial Reluctance Motor

Abstract

The invention relates to a composite excitation amorphous alloy axial reluctance motor, wherein the stator core is a ring-shaped modular amorphous alloy stator core composed of 6*n modules, n is a positive integer, and each module is composed of a permanent magnet on the circumferential side of a stator yoke part, a stator tooth part and a stator yoke part, and the polarities of adjacent permanentmagnets are opposite; The stator core has 6*n stator teeth on its side surface, 6*n open slots, 6*n permanent magnet poles, a rotor on the stator teeth side, 5*n ferromagnetic poles on the rotor yokepart close to the stator side, and windings wound on the stator teeth part; The stator and the rotor are located in the casing, the stator is fixed on the casing, and the rotor is fixed on the rotating shaft of the motor through the rotor bracket. The composite excitation amorphous alloy axial reluctance motor has the advantages of simple manufacture, low loss, high power density and wide range of weak magnetic field expansion speed.

Description

technical field [0001] The invention belongs to the field of axial flux motors, and mainly relates to a composite excitation amorphous alloy axial reluctance motor. Background technique [0002] As a new type of soft magnetic material, amorphous alloy strip has excellent magnetic properties, corrosion resistance, wear resistance, high strength, high hardness and high resistivity, and its thickness is only 0.025mm. Compared with the traditional silicon steel sheet, the amorphous alloy has very small core loss especially in the high frequency range, so the amorphous alloy strip is very suitable for high-speed high-frequency motors. The traditional amorphous alloy axial flux permanent magnet synchronous motor adopts the permanent magnet structure of double rotor and single stator. The surface of the motor rotor with this structure is covered with permanent magnets, and the stator is covered with armature windings on both sides, which has high power density. , high torque densi...

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Problems solved by technology

[0003] In order to pursue the high power torque density, high efficiency and controllable effect of the magnetic field of the motor, many researchers have proposed different types of topological structures in the form of mixed excitation to solve the problem that the magnetic field of the traditional permanent magnet synchronous motor is difficult to adjust and is not conducive to the weakening of the magnetic field. and other issues, but there are still defects in varying degrees:

However, its permanent magnet is located in the stator, and the assembled stator core increases the difficulty of process and assembly, and the electric excitation magnetic circuit passes through the permanent magnet, which increases the copper loss of the excitation winding.

[0005] (2) Chinese patent CN201610317337.4 proposes a hybrid excitation axial flux modulation composite structure motor, the purpose is to solve the problem of low output torque of the existing hybrid excitation motor

However, the stator teeth are affected by the magnetic flux generated by the armature winding, electric excitation winding and permanent magnet at the same time, and it is easy to reach a saturation state, which reduces the magnetic adjustment ability of the motor.

[0008] The air gap magnetic field in the axial flux permanent magnet synchronous motor is basically kept constant, and the air gap is large, and the number of turns in series for each phase is small, which is not conducive to weak magnetic field speed expansion

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