Square voice coil motor

A voice coil motor, square technology, applied in the direction of electrical components, electromechanical devices, etc., can solve the problems of increasing the thrust coefficient, shortening the stroke, deformation of the magnetic field, etc., to achieve the goal of increasing the magnetic field gap, improving the thrust performance, and increasing the effective stroke Effect

Inactive Publication Date: 2010-11-10
比锐精密设备(深圳)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this design, since the two sides of the gap magnetic field are magnets and iron yokes, the maximum design stroke of the motor is limited. At the same time, the strength of the gap magnetic field decreases rapidly with the increase of the gap, which leads to the deformation of the magnetic field and shortens the stroke.
At the same time, because the magnetic field strength decreases with the increase of the gap, the effect of increasing the thrust coefficient by increasing the number of turns of the mover coil is weak
When this design requires a large stroke or (and) a large thrust, it is often necessary to increase the thickness of the magnet and iron yoke, increasing the volume and cost of the entire motor

Method used

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Embodiment Construction

[0017] Embodiments of the voice coil motor of the present invention will be described below with reference to the accompanying drawings.

[0018] Such as figure 1 and figure 2 As shown, the stator magnetic field of the square voice coil motor of the invention is composed of at least four sets of magnets, each of which forms a gap magnetic field, and the two sets of magnets involved in each gap magnetic field are respectively installed on the outer iron yoke and the center iron yoke.

[0019] Such as image 3 As shown, the thickness of each magnet of the existing motor stator that the invention is used for comparison is equivalent to twice that of the magnets used in the motor of the invention.

[0020] Such as Figure 4 As shown, when the magnetic field gap of the motor increases, the magnetic field strength decreases slowly.

[0021] Such as Figure 5 and Figure 6 As shown, the stator magnetic field of the motor in the present invention is relatively evenly distribute...

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Abstract

The invention relates to a square voice coil motor, consisting of a rotor and a stator. The stator of the motor at least comprises two clearance magnetic fields with rectangular sections, and each clearance magnetic field is formed under the action of an upper magnetic block and a lower magnetic block. The clearance of the magnetic field is increased by magnets with the same volume while the intensity of the magnetic field is not weakened, and the thrust force of the motor can be modified by adding the coils; in addition, the effective travel of the motor is increased under the condition of the same volume, and the cost is saved.

Description

technical field [0001] The invention is a square voice coil motor, a driving device that generates a thrust relative to the stator after the stator provides a fixed magnetic field, and a single-phase direct current is passed through the mover. The invention relates to a square voice coil motor, which is suitable for high-speed and high-precision semiconductor equipment. Background technique [0002] The square voice coil motor is a linear motion motor composed of a stator and a mover. Usually, at least one group of magnets and iron yokes on one plane of the stator form a magnetic circuit, and a fixed magnetic field is formed in the gap formed by one plane of the magnets and the plane of the iron yoke opposite to it. After the mover coil is energized, it is affected by the gap magnetic field to generate thrust relative to the stator. In this design, since the two sides of the gap magnetic field are magnets and iron yokes, the maximum design stroke of the motor is limited. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K33/18
Inventor 禹新路程炜赵宝恩
Owner 比锐精密设备(深圳)有限公司
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