CN201041979Y - A DC line sound coil electromotor - Google Patents
A DC line sound coil electromotor Download PDFInfo
- Publication number
- CN201041979Y CN201041979Y CNU2007200851112U CN200720085111U CN201041979Y CN 201041979 Y CN201041979 Y CN 201041979Y CN U2007200851112 U CNU2007200851112 U CN U2007200851112U CN 200720085111 U CN200720085111 U CN 200720085111U CN 201041979 Y CN201041979 Y CN 201041979Y
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- magnetic steel
- iron
- magnet steel
- voice coil
- iron core
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Abstract
The utility model discloses a direct-current linear voice-coil motor, which comprises an iron casing, an iron core, a voice coil support, an enameled coil, a circular magnetic steel or a tile-shaped magnetic steel set and a cylindrical magnetic steel, wherein the circular magnetic steel is magnetized along the radial direction; each magnetic steel of the tilt-shaped magnetic steel set is radially magnetized; the cylindrical magnetic steel is axially magnetized; the circular magnetic steel or the tilt-shaped magnetic steel set is arranged on the bottom surface along the internal wall of the iron casing; the N pole of the circular magnetic steel or the tilt-shaped magnetic steel set faces toward the iron core, and the S pole faces toward the iron casing; the cylindrical magnetic steel is positioned in the center of the iron casing bottom; the N pole of the cylindrical magnetic steel faces toward the iron core, and the S pole faces toward the bottom center of the iron casing; the iron core is positioned on the cylindrical magnetic steel; the enameled coil is wound on the voice coil support; the voice coil support is arranged in an air space between the internal surface of the iron casing and the external surface of the iron core. Since magnetic flux is thoroughly utilized, the voice-coil motor has tight structure, and magnetic leakage is significantly reduced, the utility model has the advantages of large output and high journey with a small size. For the increase of the output, the utility model is applied to places requiring high acceleration and high frequency.
Description
Technical field
The utility model belongs to mechanical engineering technical field, is 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 purpose of this utility model is at the deficiencies in the prior art, and a kind of DC linear voice coil motor is provided, and 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 utility model provides 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 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.
The utility model voice coil motor has overcome the defective of prior art, can obtain bigger exerting oneself under the same size.The utlity model has following advantage: 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, the utility model voice coil motor structure 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 the utility model voice coil motor;
Fig. 2 replaces the radial annular magnetic steel schematic diagram that magnetizes for radial magnetizing tile-shaped magnet steel group (12).
Embodiment
Below in conjunction with accompanying drawing and example the utility model is described in further detail.
As shown in Figure 1, the utility model voice coil motor 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 (1)
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 or tile-shaped magnet steel group (5) and cylindrical magnet steel (6); The magnetizing direction of annular magnetic steel is radial, and every magnet steel magnetizing direction of tile-shaped magnet steel group is radially, and cylindrical magnet steel magnetizing direction is axial; Annular magnetic steel or tile-shaped magnet steel group (5) are installed in 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 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 |
|---|---|---|---|
| CNU2007200851112U CN201041979Y (en) | 2007-06-06 | 2007-06-06 | A DC line sound coil electromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200851112U CN201041979Y (en) | 2007-06-06 | 2007-06-06 | A DC line sound coil electromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041979Y true CN201041979Y (en) | 2008-03-26 |
Family
ID=39253691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200851112U Expired - Lifetime CN201041979Y (en) | 2007-06-06 | 2007-06-06 | A DC line sound coil electromotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041979Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101068090B (en) * | 2007-06-01 | 2010-10-13 | 华中科技大学 | DC linear voice coil motor |
| CN102185461A (en) * | 2011-05-05 | 2011-09-14 | 雅科贝思精密机电(上海)有限公司 | Composite double-coil motor with axial and radial magnets |
| CN104009568A (en) * | 2014-05-27 | 2014-08-27 | 王利强 | Small-stroke voice coil linear motor |
| CN105449897A (en) * | 2014-08-20 | 2016-03-30 | 上海瑾冠电气科技有限公司 | Voice coil motor magnetically conductive coil |
| CN108183593A (en) * | 2017-11-30 | 2018-06-19 | 沈阳工业大学 | uniform parallel magnetic field type voice coil motor |
-
2007
- 2007-06-06 CN CNU2007200851112U patent/CN201041979Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101068090B (en) * | 2007-06-01 | 2010-10-13 | 华中科技大学 | DC linear voice coil motor |
| CN102185461A (en) * | 2011-05-05 | 2011-09-14 | 雅科贝思精密机电(上海)有限公司 | Composite double-coil motor with axial and radial magnets |
| CN104009568A (en) * | 2014-05-27 | 2014-08-27 | 王利强 | Small-stroke voice coil linear motor |
| CN105449897A (en) * | 2014-08-20 | 2016-03-30 | 上海瑾冠电气科技有限公司 | Voice coil motor magnetically conductive coil |
| CN108183593A (en) * | 2017-11-30 | 2018-06-19 | 沈阳工业大学 | uniform parallel magnetic field type voice coil motor |
| CN108183593B (en) * | 2017-11-30 | 2020-10-16 | 沈阳工业大学 | Uniform parallel magnetic field type voice coil motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080326 Effective date of abandoning: 20070606 |