Novel slotted disc type permanent magnet eddy current coupling

Abstract

The invention discloses a novel slotted disc type permanent magnet eddy current coupling comprising a driving disc, a driving shaft, a driven disc and a driven shaft. The driving disc includes a backiron disc I and a magnetic ring. The driven disc includes an eddy current combined disc and a back iron disc II. The eddy current combined disc consists of an eddy current disc body, a plurality of left iron blocks and a plurality of right iron blocks; rectangular grooves or fan-shaped grooves distributed in an annular array are distributed in the left end face and the right end face of the eddy current disc body, wherein the numbers of the grooves in the left end face and the right end face are equal; the grooves formed in the left end face and the right end face are staggered in a circumferential direction of the eddy current disc body; and the position of any groove in the left end face is not overlapped with the position of any position of any groove in the right end face in the circumferential direction of the eddy current disc body. One left iron block is arranged in each groove in the left end face of the eddy current disc body; and one right iron block is arranged in each groove in the right end face of the eddy current disc body. With the novel slotted disc type permanent magnet eddy current coupling, the torque fluctuation is greatly reduced while the transmission torqueof the coupling is effectively improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet eddy current transmission, in particular to a disc type permanent magnet eddy current coupling. Background technique [0002] The basic principle of the permanent magnet eddy current coupling is: when the permanent magnet rotor and the conductor rotor rotate relative to each other, the permanent magnets arranged alternately in the magnetic pole direction on the permanent magnet rotor will be in the eddy current ring made of conductive material in the conductor rotor. An alternating magnetic field is generated, and then an alternating eddy current is induced in it, and the eddy current generates an induced magnetic field in the eddy current ring, and the induced magnetic field interacts with the magnetic field on the permanent magnet rotor, so that there A coupling moment is generated between them, so as to achieve the function of transmitting motion and torque. [0003] The structural fo...

AI Technical Summary

Problems solved by technology

The disadvantage of the first structural scheme is that the proportion of ineffective eddy currents in the conductor area that do not contribute to the generation of torsion is relatively large, thereby increasing redundant eddy current losses. Since eddy current losses are the main power loss of permanent magnet eddy current transmissions, it reduces The utilization efficiency of magnetic materials; at the same time, the excess eddy current loss is finally converted into heat energy, which increases the heat dissipation burden of the equipment

The disadvantage of the second structural scheme is that the copper conductor disk of the disc permanent magnet eddy current coupling is slotted, and the slotted space is filled with magnetically permeable material, which can improve the transmission torque of the device, but at the same time will greatly increase Torque ripple, limiting its application in some occasions requiring precise torque control

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