CN103427507A - Rotary voice coil motor with magnetic steel structure - Google Patents
Rotary voice coil motor with magnetic steel structure Download PDFInfo
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- CN103427507A CN103427507A CN2013103218140A CN201310321814A CN103427507A CN 103427507 A CN103427507 A CN 103427507A CN 2013103218140 A CN2013103218140 A CN 2013103218140A CN 201310321814 A CN201310321814 A CN 201310321814A CN 103427507 A CN103427507 A CN 103427507A
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- stator yoke
- voice coil
- coil motor
- magnetic steel
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Abstract
The invention provides a rotary voice coil motor with a magnetic steel structure, belongs to the technical field of the voice coil motors, and aims to solve the problems that air gap flux density changes of an ordinary rotary voice coil motor lead to non-constant torque coefficients under a condition of loading and motor output density is low. Two magnetic steel sheets are symmetrically fixed on a stator yoke, coils are arranged between the magnetic steel sheets in the stator yoke, the edge of each magnetic steel sheet is smaller than the middle position of the same in thickness, the middle position of the stator yoke is smaller than the edge of the same in thickness, the middle position of each magnetic steel sheet is identical to the middle position of the stator yoke, air gaps are formed in the middle of the stator yoke, and the width of the each coil is no less than one half of motion travel. The rotary voice coil motor has the advantages that fluctuation range of torque coefficients can be greatly reduced, and high linearity and high precision of the voice coil motor in positioning control of an open loop can be guaranteed. The average torque coefficients of the motor can be increased and the motor output density can be improved due to improvement of magnetic circuits.
Description
Technical field
The present invention relates to a kind of rotary voice coil motor of novel magnetic steel structure, belong to the voice coil motor technical field.
Background technology
There are two subject matters in existing common rotary voice coil motor, the one, under loading condition, the air gap flux density variation causes torque coefficient non-constant, this is mainly to change because the armature reaction effect makes the variation of exerting oneself with displacement of voice coil motor, and variation tendency is relevant with the direction of electrical current.This characteristic makes the control of voice coil motor become more complicated.The 2nd, torque coefficient is little, and it is low that motor goes out force density.Because torque coefficient is little, just need larger electric current when the identical moment of output, and the loss of motor is directly proportional to current squaring, what can increase is larger, aspect running reliability of motor, brings hidden danger.
Summary of the invention
The objective of the invention is the problem existed in order to solve above-mentioned prior art, there are two problems in existing common rotary voice coil motor, and the one, under loading condition, the air gap flux density variation causes torque coefficient non-constant; The 2nd, torque coefficient is little, and it is low that motor goes out force density.And then provide a kind of magnetic steel structure rotary voice coil motor.
The objective of the invention is to be achieved through the following technical solutions:
The rotary voice coil motor of a kind of novel magnetic steel structure, comprise: stator yoke, two magnet steel and coil, described two magnet steel symmetries are fixed on stator yoke, coil is arranged between interior two magnet steel of stator yoke, the thickness at described magnet steel edge is less than the thickness in magnet steel centre position, the thickness in described stator yoke centre position is less than the thickness at stator yoke edge, the centre position of magnet steel is consistent with the centre position of stator yoke, be provided with air gap in the middle of stator yoke, coil width is not less than 1/2nd of movement travel.
Voice coil motor of the present invention possesses two advantages: the one, and the torque coefficient fluctuating range can reduce greatly, can guarantee high linearity and the high accuracy of voice coil motor in the open loop Position Control.The 2nd, due to the improvement of magnetic circuit, the torque coefficient mean value of motor can increase, and motor goes out force density and improves.
The accompanying drawing explanation
Fig. 1 is common rotary voice coil motor load air gap flux density curve chart;
The air gap resultant magnetic field curve chart that Fig. 2 is voice coil motor of the present invention;
The structural representation that Fig. 3 is the rotary voice coil motor of magnetic steel structure of the present invention;
The structural representation that Fig. 4 is embodiment 2.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail: the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed execution mode, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1: as shown in Figure 3, the rotary voice coil motor of a kind of novel magnetic steel structure that the present embodiment is related, comprise: stator yoke 1, two magnet steel 2 and coil 3, described two magnet steel 2 symmetries are fixed on stator yoke 1, coil 3 is arranged between interior two magnet steel 2 of stator yoke 1, the thickness at described magnet steel 2 edges is less than the thickness in magnet steel 2 centre positions, the thickness in described stator yoke 1 centre position is less than the thickness at stator yoke 1 edge, the centre position of magnet steel 2 is consistent with the centre position of stator yoke 1, be provided with air gap 4 in the middle of stator yoke, the width of coil 3 is not less than 1/2nd of movement travel.
Embodiment 2: as shown in Figure 4, the present embodiment adopts the single face magnetic steel structure, and middle stator yoke place does not arrange permanent magnet.Stator component is designed to symmetrical structure, and stator yoke air gap place adopts the epoxy resin sealing.The mover component design is the same with common rotary voice coil motor, and adopts floor installation mode, moving-coil mode with reference to the centre of gyration.With binding post input direct-current electric current.
The present invention is based on rotary voice coil motor, also be applicable to the orthoscopic voice coil motor.
One of key technology of the present invention, be that permanent magnet magnet steel thickness does not wait, but change according to certain proportional linearity.
Two of key technology of the present invention, be that the thickness of stator yoke does not wait, and will change according to magnet thickness, is designed with the air gap of one fixed width simultaneously.
Three of key technology of the present invention is that loop length will reach the over half of movement travel.
Basic principle of the present invention is described as follows:
Two outstanding features are arranged in voice coil motor of the present invention.The one, the thickness of magnet steel and stator yoke is not uniform.Near centre position, magnet steel is thick and stator yoke is thin; The position that keeps to the side is contrary, and magnet steel is thin and stator yoke is thick.The thickness of magnet steel and stator yoke adopts the linear change rule.The 2nd, at the middle air gap that is designed with one fixed width of stator yoke.This air gap does not almost affect main field, but has greatly increased the magnetic resistance of armature reaction magnetic circuit, can effectively suppress the impact of armature reaction on the breath resultant magnetic field.
This structure voice coil motor has taken into full account the characteristic distributions in voice coil motor magnetic field, make the saturation of stator yoke more even, the average moment of motor increases, simultaneously because stator yoke mid portion saturation improves, and the effect of stator yoke intermediate air gap, the magnetic flux that armature reaction produces reduces, and the power position Slope that armature reaction causes is little, the difference of exerting oneself in the motor effective travel reduces, and reversal power position curve is more approaching.
The invention solves the problem that causes torque coefficient to change due to the voice coil motor armature reaction, simplified the control mode of voice coil motor, improved control precision.
The above; it is only preferably embodiment of the present invention; these embodiments all are based on the different implementations under general idea of the present invention; and protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (2)
1. the rotary voice coil motor of novel magnetic steel structure, it is characterized in that, comprise: stator yoke (1), two magnet steel (2) and coil (3), described two magnet steel (2) symmetry is fixed on stator yoke (1), coil (3) is arranged between interior two magnet steel of stator yoke (1) (2), the thickness at described magnet steel (2) edge is less than the thickness in magnet steel (2) centre position, the thickness in described stator yoke (1) centre position is less than the thickness at stator yoke (1) edge, the centre position of magnet steel (2) is consistent with the centre position of stator yoke (1), be provided with air gap (4) in the middle of stator yoke, the width of coil (3) is not less than 1/2nd of movement travel.
2. the rotary voice coil motor of novel magnetic steel structure according to claim 1, is characterized in that, the air gap (4) of described stator yoke (1) locates to adopt the epoxy resin sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103218140A CN103427507A (en) | 2013-07-29 | 2013-07-29 | Rotary voice coil motor with magnetic steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103218140A CN103427507A (en) | 2013-07-29 | 2013-07-29 | Rotary voice coil motor with magnetic steel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103427507A true CN103427507A (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103218140A Pending CN103427507A (en) | 2013-07-29 | 2013-07-29 | Rotary voice coil motor with magnetic steel structure |
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| CN (1) | CN103427507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553223A (en) * | 2015-12-30 | 2016-05-04 | 哈尔滨工业大学 | Self-locating dual-magnetic circuit rotating voice coil motor with special-shaped magnetic steel structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05111229A (en) * | 1991-10-15 | 1993-04-30 | Nippon Steel Corp | Converter for electric energy and mechanical energy |
| US5296767A (en) * | 1991-08-15 | 1994-03-22 | Applied Magnetics Corporation | Efficient magnetic motor armatures |
| US5731642A (en) * | 1995-04-28 | 1998-03-24 | Fujitsu Limited | Magnetic circuit structure in rotary actuator |
| JP2003333823A (en) * | 2002-05-13 | 2003-11-21 | Yaskawa Electric Corp | Voice coil type linear motor |
-
2013
- 2013-07-29 CN CN2013103218140A patent/CN103427507A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5296767A (en) * | 1991-08-15 | 1994-03-22 | Applied Magnetics Corporation | Efficient magnetic motor armatures |
| JPH05111229A (en) * | 1991-10-15 | 1993-04-30 | Nippon Steel Corp | Converter for electric energy and mechanical energy |
| US5731642A (en) * | 1995-04-28 | 1998-03-24 | Fujitsu Limited | Magnetic circuit structure in rotary actuator |
| JP2003333823A (en) * | 2002-05-13 | 2003-11-21 | Yaskawa Electric Corp | Voice coil type linear motor |
Non-Patent Citations (1)
| Title |
|---|
| 兴连国等: "基于遗传算法的弧形音圈电机优化设计", 《中南大学学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553223A (en) * | 2015-12-30 | 2016-05-04 | 哈尔滨工业大学 | Self-locating dual-magnetic circuit rotating voice coil motor with special-shaped magnetic steel structure |
| CN105553223B (en) * | 2015-12-30 | 2018-01-23 | 哈尔滨工业大学 | A kind of rotary voice coil motor of double magnetic circuit of special-shaped magnetic steel structure that can be self-positioning |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |