Efficient surface mounting type permanent magnet synchronous motor structure with cooling structure

Abstract

The invention provides an efficient surface mounting type permanent magnet synchronous motor structure with a cooling structure, and belongs to the technical field of motor structures. The motor adopts an inner rotor structure; a stator tooth is added with three equidistant virtual grooves; and the magnetic poles of the rotor is internally added with permanent magnet bridges; and grooves are formed below the magnetic poles. The technical key point is that the lowest frequency of cogging torque harmonic wave can be reduced through adding the virtual grooves on the stator tooth, so that the cogging torque amplitude is reduced; through adding the permanent magnet bridges in the rotor, the leakage flux between the magnetic poles can be effectively decreased, the gap flux density can be increased, the gap harmonic wave can be decreased, the fundamental wave content can be increased, gap waveforms with relatively good sine can be obtained, the harmonic wave distortion rate can be improved, remarkable effect is brought to restrict matrix pulsation, and higher stability is provided; and through forming the grooves below the permanent magnets to add water cooling channels, the permanent magnets on the rotor can be effectively prevented from too high temperature, and the closed magnetic circuits between the magnetic poles can be effectively decreased, so that the magnetic utilization rate is effectively improved.

Description

technical field

[0001] The invention relates to the technical field of motors, in particular to a high-efficiency surface-mounted permanent magnet synchronous motor structure with a cooling structure. Background technique

[0002] The surface-mounted permanent magnet synchronous motor is a motor that develops rapidly with the development of rare earth materials. Its stator adopts a cogged structure, and the rotor adopts a surface-mounted permanent magnet structure. The surface-mounted permanent magnet synchronous motor has the advantages of small size, simple structure, high efficiency, and high torque density. It is widely used in various engineering fields and is an energy-saving and environmentally friendly motor with great development potential. However, the excessive internal harmonics caused by the fluctuation of the tangential component force of the interaction between the permanent magnet and the armature teeth lead to the torque pulse ripple of the permanent magnet ...

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