Flat-plate magnetism-gathering magnetic circuit structure used for permanent magnet eddy current transmission device

Abstract

The invention relates to a flat-plate magnetism-gathering magnetic circuit structure used for a permanent magnet eddy current transmission device, and belongs to the technical field of permanent magnet transmission. Compared with a flat-plate permanent magnet eddy current transmission device employing a discrete magnetic circuit structure, permanent magnet material per unit mass of a flat-plate permanent magnet eddy current transmission device employing the magnetic circuit structure provided by the invention can generate larger torque or transmit higher power. The flat-plate magnetism-gathering magnetic circuit structure comprises a permanent magnet rotor and an eddy current conductor rotor which are arranged coaxially, each group of permanent magnets is composed of two to five permanent magnets which are tightly contacted with each other, each group of permanent magnets in the same magnetic coupling ring comprise the same amount of magnets, each magnet is distributed along the radial direction of the flat plate surface of a permanent magnet rotor plate, and magnetizing polarity directions of magnets in the same group of permanent magnets are identical, and magnetizing polarity directions of magnets in two adjacent groups of permanent magnets are opposite. The radial width of each vortex ring is larger than the maximum radial width of a corresponding magnetic coupling ring, i.e., the inner diameter of each vortex ring is smaller than the minimum inner diameter of the corresponding magnetic coupling ring, and the external diameter of each vortex ring is larger than the maximum external diameter of the corresponding magnetic coupling ring.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet transmission, and in particular relates to a flat-disc type magnetism-concentrating magnetic circuit structure that can be used in a permanent magnet eddy current transmission device. Background technique [0002] Permanent magnet eddy current transmission technology originated from the improvement and development of permanent magnet synchronous transmission technology. When the early permanent magnet synchronous seal drive technology was applied to equipment such as magnetic pumps and magnetic drive agitators, it often encountered unfavorable conditions such as frequent decoupling due to high temperature, corrosion or overload, which may lead to The permanent magnet on the rotor is destroyed, demagnetized and other problems. In order to solve this kind of problem, the eddy current ring technology came into being. Its basic structure is to remove the permanent magnet on the driven rotor ...

AI Technical Summary

Problems solved by technology

When the early permanent magnet synchronous seal drive technology was applied to equipment such as magnetic pumps and magnetic drive agitators, it often encountered unfavorable conditions such as frequent decoupling due to high temperature, corrosion or overload, which may lead to The permanent magnet on the rotor is damaged, demagnetized and other problems

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