Two-freedom-degree voice coil driving device

Abstract

The invention discloses a two-freedom-degree voice coil driving device. The two-freedom-degree voice coil driving device comprises a square-frame-shaped magnet upper cover assembly and a magnet lower cover assembly which are matched in a manner of covering up and down, wherein a permanent magnet is arranged on each side of each of the magnet upper cover assembly and the magnet lower cover assembly; a semi-closed cavity is formed between two adjacent permanent magnets at the upper part and the lower part on each of the magnet upper cover assembly and the magnet lower cover assembly; a coil assembly is arranged between the adjacent permanent magnets at the upper part and the lower part. By virtue of the two-freedom-degree voice coil driving device, a magnetic field is reinforced, the magnetic field with magnetic leakage of an electromotor is effectively shielded, and the motion of rotors in two-freedom-degree direction of the voice coil driving device is implemented.

Description

technical field [0001] The invention relates to the field of ultra-precise motion positioning equipment, in particular to a two-degree-of-freedom voice coil driving device. Background technique [0002] Voice coil motor (Voice Coil Actuator VCA) is a special form of direct drive motor, which has the characteristics of simple structure, small size, high speed, high acceleration and fast response. Its working principle is that the energized coil (conductor) is placed in the magnetic field A force will be generated inside, and the magnitude of the force is proportional to the current applied to the coil. The movement form of the voice coil motor manufactured based on this principle can be a straight line or a circular arc. [0003] Since its inception, voice coil motors have been widely used in computer storage devices, aerospace instruments (such as aerospace refrigerators), precision ranging instruments (such as Hall displacement measuring devices), precision lathes and mobil...

AI Technical Summary

Problems solved by technology

[0006] (1) The external magnetic flux leakage of the motor, and the mechanical structure size design of the magnetic circuit components are not suitable for the precise positioning platform with strict requirements;

[0007] (2) Due to the limitation of the structural volume, the traditional voice coil motor drive device can only achieve single-degree-of-freedom reciprocating motion, which leads to the voice coil motor drive device not meeting the requirements of small size, large output, high stroke, high frequency, and multi-degree-of-freedom motion. application requirements;

[0008] (3) Due to the unreasonable design of the magnetic circuit, the coil area of ​​the coil mover in the magnetic circuit has not been fully utilized, resulting in insufficient performance of the magnet

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