Resistance device based on magneto-rheological cement and magnetic control rheostat

Abstract

The invention discloses a resistance device based on magneto-rheological cement and a magnetic control rheostat. The resistance device based on the magneto-rheological cement comprises an insulating sleeve, electrodes, magneto-rheological cement and wiring ends, wherein the magneto-rheological cement is fixed inside the insulating sleeve; the electrodes are distributed on the upper inner surface and the lower inner surface of the insulating sleeve, and are in sufficient contact with the magneto-rheological cement; and the wiring ends are welded on the two electrodes. The magnetic control rheostat comprises excitation coils, an upper magnetic pole, a lower magnetic pole and the resistance device based on the magneto-rheological cement, wherein the resistance device based on the magneto-rheological cement is fixed between the upper magnetic pole and the lower magnetic pole; the excitation coils are coiled between the upper magnetic pole and the lower magnetic pole; the excitation coils, the upper magnetic pole, the lower magnetic pole and the resistance device based on the magneto-rheological cement commonly form a closed bidirectional magnetic loop; and the intensity of a magnetic field of the closed magnetic loop is adjusted by controlling the magnitude of the current of the excitation coil, so that the resistance of the resistance device based on the magneto-rheological cement can be changed. The invention designs the rheostat for controlling the resistance value of the device by a magnetic field generated by the current through using the characteristic that the conduction property of the magneto-rheological cement can be enhanced by additionally arranging the magneto-rheological cement with the increase of magnetic fields. The magnetic control rheostat is applicable to an electronic control system or a computer control system.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological materials and applications, and relates to an adjustable rheostat, in particular to an adjustable magnetron rheostat based on magnetorheological materials. Background technique [0002] Magnetorheological materials are smart materials that can be affected by an external magnetic field and change their specific properties. Among them, the most representative magnetorheological material, magnetorheological fluid, has been successfully applied in engineering practice. However, magnetorheological fluids have the characteristics of poor sedimentation stability, which limits the further engineering application of magnetorheological fluids. [0003] Researchers at home and abroad have overcome the problem of poor sedimentation stability by developing a high-viscosity polymer matrix to replace the liquid matrix of magnetorheological fluid, and then a new magnetorheological material - magnetorhe...

AI Technical Summary

Problems solved by technology

However, magnetorheological fluids have the characteristics of poor sedimentation stability, which limits the further engineering application of magnetorheological fluids.

[0003] Researchers at home and abroad have overcome the problem of poor sedimentation stability by developing a high-viscosity polymer matrix to replace the liquid matrix of magnetorheological fluid, and then a new magnetorheological material - magnetorheological fluid has been born. Cement and magnetorheological clay also have the characteristics of easy control and rapid response of magnetorheological fluid under the action of a magnetic field. The soft magnetic particles filled in it will quickly change the arrangement structure along the direction of the magnetic field under the action of the magnetic field. Changes in structure will bring about changes in mechanical and electrical properties, and when the magnetic field is removed, the original state can be restored

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