Magnetic ring for micromotor rotor

Abstract

The invention relates to a motor industry, in particular to a magnetic ring for a micromotor rotor. The magnetic ring for the micromotor rotor comprises a magnetic ring body and at least two pairs of circular arc-shaped magnetic sections. The magnetic ring body with an integrated structure is formed by magnetic materials in an injection molding mode. The magnetic sections are embedded inside the magnetic ring body, and are evenly arrayed inside the magnetic ring body according in a mutually reversed polarity mode. One end surface is connected with one side, facing towards an inner wall of the magnetic ring body, of an upper surface of the magnetic ring body, two grooves with equant circumferences are arranged on the end surface. Due to the fact that the magnetic ring for the micromotor rotor is a multiple-electrode magnetic ring molded by magnetic materials once, concentricity of the magnetic ring and homogeneity of quality are guaranteed, and when the magnetic ring is molded, at least two pairs of magnetic sections are embedded inside the magnetic ring body so that the magnetic ring has a multiple-electrode magnetic field.

Description

technical field [0001] The invention relates to the motor industry, in particular to a magnetic ring for a micro-motor rotor. Background technique [0002] Micro motors are now widely used in automation, electromechanical and other fields. In the field of micro-motors and stepping motors, multi-pole magnetic rings are widely used as rotors. After a pulse current is passed through the external coil, the rotor rotates through a fixed angle. [0003] The traditional multi-pole magnetic ring is made by bonding multiple magnetic segments, but it is difficult to process when making a small micro-motor. At the same time, it is difficult to make the magnetic pole angle accurately due to the splicing of multiple magnetic segments. It is difficult to achieve uniform quality of the entire magnetic ring, which makes the dynamic balance of the magnetic ring poor, increases the vibration and noise of the motor, and affects the performance of the motor. Contents of the invention [000...

AI Technical Summary

Problems solved by technology

[0003] The traditional multi-pole magnetic ring is made by bonding multiple magnetic segments, but it is difficult to process when making a small micro-motor. At the same time, it is difficult to make the magnetic pole angle accurately due to the splicing of multiple magnetic segments. It is difficult to achieve uniform quality of the entire magnetic ring, which makes the dynamic balance of the magnetic ring poor, increases the vibration and noise of the motor, and affects the performance of the motor

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