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DC linear voice coil motor

A voice coil motor, linear technology, applied in the direction of electromechanical devices, electrical components, etc., can solve the problems of voice coil motor output incompatibility, insufficient use of magnet performance, magnetic leakage problems, etc., to achieve full use of magnetic flux, structure tight, powerful effect

Inactive Publication Date: 2010-10-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In the design of voice coil motors with traditional structures, magnetic flux leakage problems often occur due to unreasonable magnetic circuit design, resulting in the underutilization of the performance of the magnets, resulting in the output of voice coil motors not meeting the application requirements of small size, large output, high stroke and high frequency. occasion

Method used

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[0019] A voice coil motor (such as figure 2 As shown, the tile-shaped magnet group consists of 12 pieces of tile-shaped magnets whose magnetization direction is radial), the outer diameter is 25mm, the equilibrium length is 24mm, the stroke is ±2.5mm, and the output is 6.39N / A. Under the limitation of size, a large voice coil output can be achieved, so that a wider range of applications can be obtained. For example, a laser beam scanner with a mechanical scanning angle of ±5° can be driven to achieve a scanning frequency of more than 200Hz.

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Abstract

A voice coil motor of AC linear type is prepared as setting magnetism charging direction of ring magnetic steel to be radial direction and that of tile magnetic steel to be radial direction as well as that of cylindrical magnetic steel to be axial direction, arranging said ring or tile magnetic steel on base surface of iron shell along internal wall of said shell and cylindrical magnetic steel atcenter of iron shell bottom, arranging iron core on cylindrical magnetic steel, winding lacquered wire coil on voice coil support and erecting voice coil support in air gas between internal surface of iron shell and external surface of iron core.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a DC linear voice coil motor. Background technique [0002] 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 when an energized coil (conductor) is placed in a magnetic field, a force is generated, 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 straight line or circular arc. [0003] Since its inception, it has been widely used in optical disk drives, hard disk drives, medical equipment, aerospace instruments (such as aerospace refrigerators), precision ranging instruments (such as Hall displacement measuring devices), piston lathe tool holders and mobile phones (as vibration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K33/18
Inventor 陈四海马冬新向思桦魏伟肖丁吴鑫
Owner HUAZHONG UNIV OF SCI & TECH
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