Connection structure of permanent magnetic motor rotor

Abstract

The invention relates to a connection structure of a permanent magnetic motor rotor. The connection structure comprises an iron core, a connection rod, an end plate and a sunk screw. The sunk screw is connected with the connection rod through dripping and tapping, one side of the end plate is machined to be a funnel shape and used for being tightly attached to the taper face of the sunk screw, the other side of the end plate is provided with a hole in a bored mode and used for assembling the connection rod, the connection rod and the iron core are assembled in an insertion mode, meanwhile, the end plate and the connection rod are fixedly connected through the sunk screw, and the requirement of an assembly dimension chain is M+2H1-2L1>=L, wherein L refers to the total connection length of the sunk screw and the connection rod, H refers to the thickness of the end plate, H1 refers to the depth of the bored hole, and M refers to the total assembly length of the connection rod and the iron core. According to the connection structure of the permanent magnetic motor rotor, a novel connection mode is adopted, so that unevenness of the surface of the rotor is reduced, and the risk that the overall assembly of the rotor is interfered by other structural elements is reduced. Meanwhile, wind resistance loss is reduced, and efficiency and mechanical strength of a motor are improved. Besides, the surface of the motor is smooth, and generated wind noise can be lowered.

Description

technical field [0001] The invention relates to the field of permanent magnet motor manufacturing, in particular to a connection structure of a permanent magnet motor rotor. Background technique [0002] In recent years, permanent magnet motors have been favored by users for their excellent motor performance such as high power density, high power factor and high efficiency. There is no difference between the permanent magnet motor stator and the ordinary induction motor stator, the main difference is in the rotor part. The permanent magnet motor rotor adopts permanent magnet excitation, which replaces the traditional synchronous motor excitation winding, reduces the related motor excitation loss, improves the motor efficiency, reduces the motor slip ring, simplifies the overall structure of the motor, and increases the reliability of the motor operation . [0003] The rotor of a permanent magnet motor is generally composed of silicon steel sheets, magnets and a fixed struc...

AI Technical Summary

Problems solved by technology

Although this connection method is more convenient and does not require too much mechanical processing, when the motor is running at high speed, since the mechanical resistance of the rotor mainly comes from the bearing and surface wind resistance, in the actual application process, this solution will cause roughness on the motor rotor. The surface of the motor will cause wind resistance loss and wind noise, which will affect customer satisfaction

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