Magnetic bearing ring of a micro Hall motor

Abstract

The invention discloses a magnetic bearing ring of a micro-Hall motor. The magnetic bearing ring consists of a ring body (1), a shaft hole (2), an interference rib (3), an orientation groove (4), a magnetic core groove (5 ), hot melting table (6) and mesopore (7). In the present invention, the non-magnetized magnetic core is embedded in the magnetic core groove first, and the magnetic core is fixed by hot-melt flattening and hot-melt table, and then the magnetic core is oriented magnetized based on the directional groove, and then the ring body is fixed through the shaft hole. The technical solution of interference press fitting on the rotor shaft of the motor overcomes the problems and deficiencies of the existing technology such as uneven magnetic distribution or high cost of complex process, so that the setting of the rotation measuring magnet of the micro-Hall motor achieves a magnetic The purpose of uniform distribution, process simplification and cost reduction.

Description

technical field [0001] The invention relates to a micro-Hall motor, in particular to a magnetic bearing ring of a micro-Hall motor used to carry a rotation measuring magnet. Background technique [0002] The rotor shaft of the micro-Hall motor is equipped with a permanent magnet used to cooperate with the Hall element to measure the number of rotor rotations; hereinafter, the micro-Hall motor is referred to as the motor, and the permanent magnet used for measuring rotation is referred to as the measuring rotation magnet; [0003] The existing technology uses ring-shaped nylon permanent magnets or NdFeB magnets as the measuring rotation magnets, which are referred to as nylon magnetic rings and NdFeB magnetic rings respectively. Nylon magnetic rings or NdFeB magnetic rings are fixed to the on the rotor shaft of the motor, see Figure 7 ;Because the nylon magnetic ring will be stretched and deformed after being press-fitted, the deformation will change the direction of the mag...

AI Technical Summary

Problems solved by technology

[0003] The existing technology uses ring-shaped nylon permanent magnets or NdFeB magnets as the measuring rotation magnets, which are referred to as nylon magnetic rings and NdFeB magnetic rings respectively. Nylon magnetic rings or NdFeB magnetic rings are fixed to the on the rotor shaft of the motor, see Figure 7 ;Because the nylon magnetic ring will be stretched and deformed after being press-fitted, the deformation will change the direction of the magnetic chips that have been magnetized and arranged neatly, resulting in uneven magnetic distribution of the nylon magnetic ring, resulting in signal disorder when the motor is running; Because the NdFeB magnetic ring is brittle, it will be brittle and damaged when it is press-fitted on the rotor shaft, and the NdFeB magnetic ring will crack or break when the motor is running at high speed. A copper or aluminum bushing for transition is installed between the boron magnetic ring and the motor shaft; however, the process of installing the bushing is complicated and costly, so the existing technology has problems of uneven magnetic distribution, or complicated process and high cost Problems and deficiencies

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