Magnetic tile structure of a DC micro-motor

Abstract

A DC micro-motor magnetic tile structure, including a magnetic tile body, the inner and outer arc surfaces of the magnetic tile body are concentric, and there are two R angles at the two ends of the outer arc surface, and it is characterized in that: respectively along the two R angles The inner end facing inwardly is provided with a flat cut surface on the outer arc surface, the two flat cut surfaces are symmetrical to each other, and there is a distance between the flat cut surface and the extended surface of the arc surface in the middle part of the outer arc surface. Wherein the vertical distance L between the outer end of the tangent surface and the arc-shaped extension surface of the outer arc-shaped surface is 7%-8% of the distance L1 between the outer arc-shaped surface and the inner arc-shaped surface. The arc length l1 of the arc surface in the middle part of the outer arc surface is 75-78% of the arc length l of the entire outer arc surface. The magnetic tile structure makes the increase of the current usage of the motor smaller when the load speed is greatly increased, and can also reduce noise.

Description

technical field [0001] The invention relates to a magnetic tile structure of a motor, in particular to a magnetic tile structure of a DC micro-motor. Background technique [0002] The magnetic tile structure used as the stator of the existing DC micro-motor is the following two structures: 1) the concentric magnetic tile, the inner arc Ra and the outer arc surface Rb are all centered at the O point, that is, the wall thickness is equal thickness, so The air gap between the rotor and the stator of the micromotor is as large as figure 1 shown in . 2) For eccentric magnetic tiles, the inner arc Ra and the outer arc surface Rb are centered at Oa and Ob points respectively, that is, the wall thickness is the thickest in the middle and slightly thinner at both ends, as figure 2 shown in . The former one has higher noise and lower load speed. The latter type has lower noise, but the load speed still does not meet the high-end requirements, and the load current will be too larg...

AI Technical Summary

Problems solved by technology

The former one has higher noise and lower load speed

The latter type has lower noise, but the load speed still does not meet the high-end requirements, and the load current will be too large, which makes it difficult to meet higher environmental protection requirements

Images