CN101068090B - DC linear voice coil motor - Google Patents
DC linear voice coil motor Download PDFInfo
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- CN101068090B CN101068090B CN2007100524098A CN200710052409A CN101068090B CN 101068090 B CN101068090 B CN 101068090B CN 2007100524098 A CN2007100524098 A CN 2007100524098A CN 200710052409 A CN200710052409 A CN 200710052409A CN 101068090 B CN101068090 B CN 101068090B
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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 at center 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
The invention belongs to mechanical engineering technical field, be specifically related to a kind of DC linear voice coil motor.
Background technology
Voice coil motor (Voice Coil Actuator is a kind of direct drive motors of special shape VCA), have simple in structure, volume is little, at a high speed, high quicken and respond characteristics such as fast.Its operation principle is, hot-wire coil (conductor) is placed in the magnetic field and will produces power, and the size of power is proportional with the electric current that is applied on the coil.The voice coil motor forms of motion of making based on this principle can be straight line or circular arc.
Since it comes out, be widely used in CD drive, hard disk drive, medicine equipment, space flight instrument (for example spacecraft cooling machine), precise distance measurement instrument (for example Hall displacement measuring device), piston machine tool knife rest and mobile phone fields such as (as vibrating motors), be the FA linear electric motors of a kind of performance, have a wide range of applications.
In recent years, along with at a high speed, the raising and the voice coil motor technology rapid development of high-accuracy position system performance requirement, voice coil motor quickens at many multi-form height, also be used widely on the high frequency pumping.As, the location of lens in the optical system; The multi-coordinate locating platform of machine tool; Precise electronic pipe, vacuum tube control in the medical apparatus; The driving of laser beam scanner; In the flexible robot,, can also suppress vibration effectively with voice coil motor for making quick, the accurate location of end effector.
Owing to the unreasonable leakage field problem that usually occurs of magnetic Circuit Design, cause magnet performance to be not fully utilized in the design of traditional structure voice coil motor, thereby cause exerting oneself of voice coil motor not meet the occasion that small size is exerted oneself greatly, the high-stroke high frequency applications requires.For example BEI company produces LA10-08-000A type voice coil motor, and its external diameter is 24.13mm, the long 19.69mm of equilibrium state, and stroke ± 2.54mm, exerting oneself only is 3.61N/A.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of DC linear voice coil motor is provided, the characteristics that this motor has small size, exerts oneself greatly can guarantee high-stroke and high-frequency to the small-sized machine system drive.
The invention provides DC linear voice coil motor, comprise iron-clad, iron core, voice coil suspension, enameled wire loop and magnet steel, it is characterized in that: magnet steel comprises annular magnetic steel or tile-shaped magnet steel group and cylindrical magnet steel; The magnetizing direction of annular magnetic steel is radial, and every magnet steel magnetizing direction of tile-shaped magnet steel group is radially, and the magnetizing direction of cylindrical magnet steel is axial; Annular magnetic steel or tile-shaped magnet steel group are installed in the bottom surface along the iron-clad inwall, and the N level of annular magnetic steel or tile-shaped magnet steel group is facing to iron core, and the S level is facing to iron-clad; Cylindrical magnet steel is positioned at the iron-clad bottom center, and the N level of cylindrical magnet steel is facing to iron core, and the S level is facing to iron-clad bottom center; Iron core is positioned on the cylindrical magnet steel; Enameled wire loop closely is wound on the voice coil suspension, and voice coil suspension is installed in the air gap between iron-clad inner surface and the core exterior surface.
Voice coil motor of the present invention has overcome the defective of prior art, can obtain bigger exerting oneself under the same size.The present invention has the following advantages: because the guiding of the cylindrical magnet steel in bottom, annular magnetic steel (or the tile-shaped magnet steel group) magnetic line of force up passes through iron core, and all pass voice coil suspension and enameled wire loop, thereby magnetic flux is fully used, reduce even do not have a leakage field, and then it is bigger that unidimensional voice coil motor is exerted oneself, and stroke is longer.Because magnetic leakage reduces the increase of exerting oneself of voice coil motor under the same drive current, the stroke lengthening; Because the increasing of exerting oneself is applicable to and needs the high-frequency occasion of high acceleration.In a word, voice coil motor structure of the present invention is tight, and magnetic flux is fully used, and magnetic leakage reduces significantly, the advantage of have small size, exerting oneself greatly.
Description of drawings
Fig. 1 is the generalized section of voice coil motor of the present invention;
Fig. 2 replaces the radial annular magnetic steel schematic diagram that magnetizes for radial magnetizing tile-shaped magnet steel group (12).
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing and example.
As shown in Figure 1, voice coil motor of the present invention comprises iron-clad 1, iron core 2, voice coil suspension 3, enameled wire loop 4, annular magnetic steel or tile-shaped magnet steel group 5 and cylindrical magnet steel 6, and wherein, voice coil suspension 3 and enameled wire loop 4 are referred to as the voice coil loudspeaker voice coil part, and all the other are ferromagnetic part.
The magnetizing direction of annular magnetic steel is radial, if the tile-shaped magnet steel group, then the magnetizing direction of every part of tile-shaped magnet steel is for radially, and cylindrical magnet steel magnetizing direction is axial.When adopting the tile-shaped magnet steel group to replace annular magnetic steel, the umber of employing is many more, and the magnetic flux utilance is high more, and voice coil motor is exerted oneself big more.When adopting the radial voice coil motor that the magnetizes during annular magnetic steel maximum of exerting oneself.
Annular magnetic steel or tile-shaped magnet steel group 5 are installed to the bottom surface along iron-clad 1 inwall, and the N level of annular magnetic steel or tile-shaped magnet steel group 5 is facing to iron core 2, and the S level is facing to iron-clad 1.Cylindrical magnet steel 6 is adhered to iron-clad 1 bottom centre, and the N level of cylindrical magnet steel 6 is facing to iron core 2, and the S level is facing to iron-clad 1 bottom center.Iron core 2 is bonded on the cylindrical magnet steel 6.Enameled wire loop 4 closely is wound on the voice coil suspension 3.Iron core 2 outer surfaces and iron-clad 1 inner surface form annulus gap, and voice coil loudspeaker voice coil partly is installed in the annulus gap between iron-clad 1 inner surface and iron core 2 outer surfaces.Voice coil loudspeaker voice coil part is motion vertically in annulus gap, suitably reserves certain air gap space, the voice coil loudspeaker voice coil part can also with the angled motion of iron core 2 axis.
Iron-clad 1 and iron core 2 adopt electrical pure iron to make, and the surface prevents to get rusty as oxidation processes; Voice coil suspension 3 adopts nylon plastic(s) to make; Enameled wire loop 4 adopts the coiling of copper core enamelled wire, and the intact back of coiling is coated with insulating varnish on the enamelled wire surface; Annular magnetic steel or tile-shaped magnet steel group 5 and cylindrical magnet steel 6 adopt Nd-Fe-B permanent magnet to make.
Annular magnetic steel or tile-shaped magnet steel group 5 are used with cylindrical magnet steel 6, cylindrical magnet steel 6 magnetic line of force directions force annular magnetic steel or tile-shaped magnet steel group 5 magnetic line of force directions along iron core up, and the overwhelming majority is passed the enameled wire loop 4 between iron-clad 1 and the iron core 2, make the close maximum of magnetic in the coil air gap, thereby make magnetic flux reach maximum utilization ratio, such design can not cause leakage, almost all magnetic lines of force that send from magnet surface all pass through air gap, and then the small size of realization voice coil motor is exerted oneself greatly.
The size of annular magnetic steel or tile-shaped magnet steel group 5 and cylindrical magnet steel 6 can be optimized, for the magnetic line of force is successfully upwards derived, can suitably extend cylindrical magnet steel 6, thereby force the annular magnetic steel or tile-shaped magnet steel group 5 magnetic lines of force up walk, stop the loss of magnetic flux.
Iron core 2 is cylindrical, and external diameter can change in right amount, and changing not produce magnetic saturation is critical point.Because iron core 2 external diameters whenever dwindle a bit, the magnet steel size just increases a bit, thereby it is close to increase magnetic, and but, everything does not produce magnetic saturation with iron core 2 is prerequisite, and design should be a best choice in critical point.Simultaneously, iron core 2 can be designed to the thick slightly bicylindrical type structure of the higher authorities, helps the guiding of magnetic induction line.Example:
Manufactured experimently a voice coil motor (as shown in Figure 2 according to the above structure, the tile-shaped magnet steel group is made up of for tile-shaped magnet steel radially 12 magnetizing directions), its external diameter is 25mm, the long 24mm of equilibrium state, stroke ± 2.5mm, exerting oneself is 6.39N/A, has been issued to big voice coil loudspeaker voice coil in undersized restriction and has exerted oneself, thereby can obtain wider application, for example can the driving device scanning angle reach more than the scanning frequency 200Hz for ± 5 ° laser beam scanner.
Claims (2)
1. a DC linear voice coil motor comprises iron-clad, iron core, voice coil suspension, enameled wire loop and magnet steel, it is characterized in that:
Magnet steel comprises annular magnetic steel and cylindrical magnet steel (6); The magnetizing direction of annular magnetic steel is radial, and cylindrical magnet steel magnetizing direction is axial; Annular magnetic steel is installed in the bottom surface along iron-clad (1) inwall, and the N level of annular magnetic steel is facing to iron core (2), and the S level is facing to iron-clad (1); Cylindrical magnet steel (6) is positioned at iron-clad (1) bottom center, and the N level of cylindrical magnet steel (6) is facing to iron core (2), and the S level is facing to iron-clad (1) bottom center; Iron core (2) is positioned on the cylindrical magnet steel (6); Enameled wire loop (4) is wound on the voice coil suspension (3), and voice coil suspension (3) is installed in the annulus gap between iron-clad (1) inner surface and iron core (2) outer surface.
2. a DC linear voice coil motor comprises iron-clad, iron core, voice coil suspension, enameled wire loop and magnet steel, it is characterized in that:
Magnet steel comprises tile-shaped magnet steel group and cylindrical magnet steel (6); Every magnet steel magnetizing direction of tile-shaped magnet steel group is radially, and cylindrical magnet steel magnetizing direction is axial; The tile-shaped magnet steel group is installed in the bottom surface along iron-clad (1) inwall, and the N level of tile-shaped magnet steel group is facing to iron core (2), and the S level is facing to iron-clad (1); Cylindrical magnet steel (6) is positioned at iron-clad (1) bottom center, and the N level of cylindrical magnet steel (6) is facing to iron core (2), and the S level is facing to iron-clad (1) bottom center; Iron core (2) is positioned on the cylindrical magnet steel (6); Enameled wire loop (4) is wound on the voice coil suspension (3), and voice coil suspension (3) is installed in the annulus gap between iron-clad (1) inner surface and iron core (2) outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100524098A CN101068090B (en) | 2007-06-01 | 2007-06-01 | DC linear voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100524098A CN101068090B (en) | 2007-06-01 | 2007-06-01 | DC linear voice coil motor |
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| Publication Number | Publication Date |
|---|---|
| CN101068090A CN101068090A (en) | 2007-11-07 |
| CN101068090B true CN101068090B (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100524098A Expired - Fee Related CN101068090B (en) | 2007-06-01 | 2007-06-01 | DC linear voice coil motor |
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| CN (1) | CN101068090B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849613A (en) * | 2019-03-29 | 2020-02-28 | 华南理工大学 | Dynamic characteristic testing device and system for voice coil actuator |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110081532A (en) * | 2010-01-08 | 2011-07-14 | 엘지이노텍 주식회사 | Spring for voice coil motor and voice coil motor having the same |
| CN102064659B (en) * | 2010-11-26 | 2013-02-20 | 天津凯雷德科技发展有限公司 | Manufacturing method of cylindrical linear motor |
| CN102013783B (en) * | 2010-12-23 | 2012-07-25 | 天津职业技术师范大学 | Light direct current (DC) linear motor |
| CN105281531B (en) * | 2014-07-11 | 2018-06-01 | 上海微电子装备（集团）股份有限公司 | Voice coil motor with gravity compensation function |
| TWM527186U (en) * | 2016-01-29 | 2016-08-11 | 台睿精工股份有限公司 | Dual diamagnetic linear resonant actuator |
| CN108712055A (en) * | 2018-04-26 | 2018-10-26 | 中国科学院国家天文台南京天文光学技术研究所 | Voice coil motor for the adaptive distorting lens of heavy caliber |
| CN112242785B (en) * | 2019-07-17 | 2022-06-14 | 华为技术有限公司 | Linear motor, lens assembly and electronic equipment |
| CN114425733B (en) * | 2021-12-14 | 2022-12-06 | 上海工程技术大学 | Two-degree-of-freedom force control end effector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1737120A1 (en) * | 2005-06-21 | 2006-12-27 | Bei Sensors And Systems Company, Inc. | Voice coil actuator with embedded capacitive sensor for motion, position and/or acceleration detection |
| CN201041979Y (en) * | 2007-06-06 | 2008-03-26 | 华中科技大学 | A DC line sound coil electromotor |
-
2007
- 2007-06-01 CN CN2007100524098A patent/CN101068090B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1737120A1 (en) * | 2005-06-21 | 2006-12-27 | Bei Sensors And Systems Company, Inc. | Voice coil actuator with embedded capacitive sensor for motion, position and/or acceleration detection |
| CN201041979Y (en) * | 2007-06-06 | 2008-03-26 | 华中科技大学 | A DC line sound coil electromotor |
Non-Patent Citations (2)
| Title |
|---|
| JP平4-69041A 1992.03.04 |
| JP特开2002-336777A 2002.11.26 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849613A (en) * | 2019-03-29 | 2020-02-28 | 华南理工大学 | Dynamic characteristic testing device and system for voice coil actuator |
| CN110849613B (en) * | 2019-03-29 | 2021-07-20 | 华南理工大学 | Dynamic characteristic testing device and system for voice coil actuator |
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| Publication number | Publication date |
|---|---|
| CN101068090A (en) | 2007-11-07 |
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