A moving magnet magnetic micro-displacement driver

Abstract

The invention relates to a moving magnet type magneto-induced micro-displacement driver, which includes an outer magnetic core, an inner magnetic core, a permanent magnet, a magnetostrictive material, a compression bolt, a butterfly spring and an output shaft; wherein, the outer The magnetically conductive core and the inner magnetically conductive core are arranged oppositely; the permanent magnet is arranged between the outer magnetically conductive core and the inner magnetically conductive core; the magnetostrictive material is located in the inner magnetically conductive core; the pressing bolt is screwed into the inner on the permeable core; the belleville spring abuts between the compression bolt and the output shaft; the output shaft abuts on one side of the magnetostrictive material and is driven by the magnetostrictive material. The present invention uses permanent magnets to provide a driving magnetic field for the magnetostrictive material, changes the driving magnetic field in the magnetostrictive material by changing the position of the permanent magnet, thereby changing the stretching length of the magnetostrictive material, can realize micron-level control, and is suitable for high-precision positioning requirements.

Description

【Technical field】 [0001] The invention relates to a displacement driver, in particular to a moving magnet magnetic micro-displacement driver, which can convert the macroscopic displacement of a permanent magnet driven by a rotating motor or a linear motor into a micron-level micro-displacement of a magnetostrictive material, which belongs to high-precision positioning equipment technology field. 【Background technique】 [0002] Smart materials, such as piezoelectric ceramics and magnetostrictive materials, enable micron-scale positioning. After the voltage is applied to the piezoelectric ceramics, the micro-displacement positioning is realized through the piezoelectric positive effect, and the larger positioning stroke is realized through the displacement amplification mechanism or the stacking method. The disadvantage of piezoelectric ceramics is that the material itself is relatively brittle, and its tangential load bearing capacity is limited. Different from piezoelectri...

AI Technical Summary

Problems solved by technology

The disadvantage of piezoelectric ceramics is that the material itself is relatively brittle, and the tangential load capacity is limited

The disadvantage of this driving method is that the energy consumption is large and the temperature is high.

The magnetic permeability of magnetostrictive materials is usually low, which requires more ampere-turns to drive, and the current in the coil will cause heat loss

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