Magnet ring used for micro-motor

Abstract

The invention relates to the technical field of micro-motors, in particular to a magnet ring used for the micro-motor. The magnet ring used for the micro-motor comprises a magnet ring body and at least two pairs of circular arc magnet sections. The magnet ring body is of an integrated structure and made of magnetic materials in an injection molding mode. The magnet sections are inlaid into the magnet ring body, and evenly arranged in the magnet ring body according to mutually reverse polarity. One end face is connected to one side, facing toward the inner wall of the magnet ring body, of the upper surface of the magnet ring body. Four protrusions are arranged on the end face, wherein a circumference is equally divided by the four protrusions. One inclined face is arranged one side, facing toward the inner wall of the magnet ring body, of the bottom face of the magnet ring body. Four circular-arc-shaped grooves are formed in the whole face which is formed by connection of the bottom face and the inclined face, and a circumference is equally divided by the four circular-arc-shaped grooves. The magnet ring is made of the magnetic materials in a once formed mode. Concentricity of the magnet ring and evenness of mass are guaranteed, the magnet ring is formed, and meanwhile the at least two pairs of the magnet sections are inlaid so that the magnet ring has multi-pole magnetic fields.

Description

technical field [0001] The invention relates to the technical field of micro-motors, in particular to a magnetic ring for micro-motors. Background technique [0002] Micro motors are now widely used in automation, electromechanical and other fields. Magnetic rings are widely used as rotors in the fields of micro-motors and stepper motors. After a pulse current is passed through the external coil, the rotor rotates through a fixed angle. [0003] The traditional 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. At the same time, it is difficult to do The quality of the entire magnetic ring is uniform, making the dynamic balance of the magnetic ring poor, increasing the vibration and noise of the motor, and affecting the performance of the motor. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] The traditional 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. At the same time, it is difficult to do The quality of the entire magnetic ring is uniform, making the dynamic balance of the magnetic ring poor, increasing the vibration and noise of the motor, and affecting the performance of the motor

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