Self-riveting motor rotor iron core

Abstract

The invention provides a self-riveting motor rotor iron core which is provided with an iron core body formed by plural silicon steel plates through laminated combination. Each silicon steel plate is provided with a shaft hole at the center. The periphery of the shaft hole is provided with plural slot holes which are configured in a surrounding way in the preset space. Plural self-riveting points are evenly distributed in the area between the shaft hole and the slot holes. Each silicon steel plate is provided with at least two types of slot holes of different lengths, and the length of the slot hole corresponding to the self-riveting points of each silicon steel plate is relatively less than the length of the slot hole which is not corresponding to the self-riveting points. Therefore, the limitation of the self-riveting points can be avoided, and the maximum torque of the motor can be increased by changing the shape of the rotor slot holes under the condition that the winding parameters cannot be broken through.

Description

technical field [0001] The invention relates to the rotor of a motor and aims to provide a self-riveting motor rotor core that can effectively increase the torque of the motor. Background technique [0002] Press, silicon steel sheets are widely used in magnetic circuits in transformers, motors, generators and other motors. Mechanical energy; In addition, silicon steel sheets are usually stacked layer by layer to form the core of the magnetic circuit due to the consideration that the alternating magnetic field will cause eddy current loss in the core. [0003] For example, the body of a general squirrel-cage rotor basically has a cylindrical core made of silicon steel sheets, and a plurality of conductors placed around the core. The short-circuit end ring short-circuits all the conductors. Because the shape is similar to a squirrel cage, it is called the squirrel-cage type; and the squirrel-cage rotor is mostly made of copper or aluminum bars as conductors, and the conducto...

AI Technical Summary

Problems solved by technology

[0005] However, the laminated silicon steel sheets fixed by self-riveting are often limited by the self-riveting points. Many squirrel-cage motors used in strict operation requirements need to have a large torque performance, so how to adjust the winding parameters cannot be solved. Increasing the maximum torque of squirrel-cage motors without breakthroughs has long been an urgent issue in the industry and academia

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