CN102185461A - Composite double-coil motor with axial and radial magnets - Google Patents
Composite double-coil motor with axial and radial magnets Download PDFInfo
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- CN102185461A CN102185461A CN201110117268XA CN201110117268A CN102185461A CN 102185461 A CN102185461 A CN 102185461A CN 201110117268X A CN201110117268X A CN 201110117268XA CN 201110117268 A CN201110117268 A CN 201110117268A CN 102185461 A CN102185461 A CN 102185461A
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Abstract
The invention relates to a composite double-coil motor with axial and radial magnets, which is an improved double-moving coil motor. A cylindrical shell of the motor is provided with a closed end and an open end. An inner core is arranged in the center of the cylindrical shell. An annular air gap is formed between the inner core and the cylindrical shell. A permanent magnet consists of a ferromagnet core, is arranged along a vertical axis and terminated at a position close to the closed end of the shell, and comprises an axial magnetized permanent magnet with a first magnetized direction. A coil group can move in the annular air gap, is connected to a power supply, and comprises a first coil winding and a second coil winding, and the first and second coil windings are wound in series in opposite directions. The double-moving coil motor adopts different constructions of the axial magnetized permanent magnets, and two magnetic circuits are provided by one or more radial magnets, so the two coil windings of the double-moving coil motor are allowed to more effectively perform magnetic flux cutting motion in the air gap.
Description
Technical field
The present invention relates to a kind of moving-coil motor, particularly a kind of having axially and the twin coil motor of radial magnet combined type.
Background technology
The moving-coil motor is to interact according to electricity and magnetic circuit, and the calutron of linear mechanical motion is provided on coil.As shown in Figure 1, the type of traditional moving-coil motor is to define between the two annular space by a cylinder inner core and the shell that surrounds inner core.Annular magnet is installed in outer casing inner wall, and another is installed in the outer wall of inner core.This combination provides a single closed magnetic path.A circular coil winding is placed in the middle of the air gap.When electric current passes through coil windings, produce a linear force by the interaction of electric current and the magnetic flux density of passing air gap.
Fig. 2 has shown another kind of traditional movable type circle formula design of electrical motor.In this design, an axial magnet attachment is at the cylindrical shell closed end.Ferromagnetic pole piece is attached to the other end of axial magnet.Magnetic flux is produced by the air gap of ferromagnetic pole piece and shell aperture end.When the coil windings of electric current by the circular coil group, can produce a linear force.
United States Patent (USP) (patent No. is 4692999) discloses a kind of for the flux path towards the centered cylinder core is provided, and uses two annular magnets attached to the moving-coil motor on the inwall of shell.In this configuration, the moving-coil assembly is partly formed by twin coil, rather than unicoil.This twin coil design makes coil windings interact or " cutting " air gap two positions.This causes bigger linear force, has improved the efficient of portable coil motor.
The other patent (patent No. is 4808955) of the U.S. discloses the design that another moving-coil motor has also adopted multi-thread circle.In the twin coil design, reveal and described similar design by the U.S..But in this design, increase by two annular magnets also attached to the kernel outer wall.Embody single-ended, first and second magnetic circuit provide more effective cutting magnetic flux.
An other patent (patent No. is 5345206) of the U.S. discloses a kind of portable coil motor, and it has used the axial magnetized cylindrical permanent magnet of a cover to be fixed on the centre of motor.In the permanent magnet element that two axial magnetizeds are arranged (seeing shown in Figure 3) lining, form two magnetic circuits, allow two more effective cutting magnetic flux of coiler part.This twin coil design makes moving-coil can have a traditional moving-coil of describing than Fig. 2 to design bigger linear force, and they have identical diameter, but the twin coil design has longer axial length.
The structure of the moving-coil motor of a last technology is further perfect provides higher performance and other economic interests.
Summary of the invention
The objective of the invention is to be to improve a kind of improvement and have axially and the twin coil motor of radial magnet combined type, it has adopted the design of twin coil and has produced very high magnetic field force with the permanent magnet of axial magnetized and one or more interaction that is arranged in the permanent magnet of the diametrical magnetization that an annulus uses.
The present invention adopts the structure of the permanent magnet of different axial magnetizeds, and it has one or more radial magnet that two magnetic circuits are provided.Therefore allow the more effective magnetic flux that in air gap, cuts of two coiler parts of moving-coil motor.
Of the present invention having axially and the twin coil motor of radial magnet combined type, comprising:
One cylinder blanket, this cylinder blanket is provided with a closed end, and this closed end extends to inner surface along the longitudinal component of this cylinder blanket to openend;
Be provided with a kernel in the center of this cylinder blanket, be provided with the ring-type air gap between this kernel and this cylinder blanket;
One coil groups moves in this annular air gap, is connected to a power supply, and this coil groups comprises the coil supporter that is located in the annular air gap, and first coil windings is shaped on coil supporter, and coiled has first polarity; Second coil windings is shaped on coil supporter, the coiled and first opposite polarity second polarity; First coil windings and second coil groups separate; The axial magnetized permanent magnet is located at the centre of first coil windings and second coil windings, makes coil windings and the second coil windings coiled series connection but direction is opposite of winning;
The permanent magnet that one longitudinal axis of being made up of the ferromagnet inner core is arranged, the permanent magnet that this longitudinal axis is arranged comprises the axial magnetized permanent magnet, and the end that the axial magnetized permanent magnet longitudinal axis is arranged is screwed on the inner surface by screw, and the axial magnetized permanent magnet has magnetized first direction; And
The permanent magnet that this longitudinal axis is arranged also comprises the diametrical magnetization permanent magnet, and the diametrical magnetization permanent magnet is attached on the inner surface of closed loop, and the diametrical magnetization permanent magnet has magnetized second direction.
Among the present invention, the direction that axial magnetized permanent magnet and diametrical magnetization permanent magnet are magnetized is opposite, make two magnetic circuits by first coil windings and second coil windings axially be opposite, when electric current when the coil, can produce the axial force of a stack.
Among the present invention, magnetized first direction and magnetized second direction make the magnetic flux of linear electric machine closed end guide by the diametrical magnetization permanent magnet from cylinder blanket.
Among the present invention, diametrical magnetization permanent magnet annular is arranged and is made of one or more diametrical magnetization permanent magnet.
Among the present invention, the first ferromagnet inner core is attached to first end on the surface, inside of cylinder blanket closed end, and the second ferromagnet inner core is attached to first end of axial magnetized permanent magnet, and the axial magnetized permanent magnet is attached to second end of three-iron magnet pole piece.
Among the present invention, the center of the permanent magnet that the longitudinal axis is arranged is provided with through hole, its allow axle from coil combination to the motor other end.
Among the present invention, first end of the first ferromagnet inner core is screwed on the inner surface of cylinder blanket closed end by one or more screws.
Among the present invention, first end of the first ferromagnet inner core is connected on the inner surface of cylinder blanket closed end by one or more bolts.
Among the present invention, the diametrical magnetization permanent magnet is a high energy arc ndfeb magnet.
Among the present invention, described twin coil motor comprises axial magnetized permanent magnet and diametrical magnetization permanent magnet, and it provides two magnetic circuits by one or more radial magnet, and first coil and second coil are done the cutting flux motion in annular air gap.
The beneficial effect that the present invention has: the arc magnet that configuration by using an axial magnet and substantial radial are arranged, effectively radially guide by the inside center of arc-shaped magnet from cylinder blanket at the magnetic flux of motor closed end.This technology that will compare in the past improves performance.
And generally little magnet space compared littler.This result has reduced the cost of making.
The use of minimizing of magnet space and lightweight material, for example aluminium end cap is supporting magnet, also can reduce the overall weight of motor, has therefore reduced cost of transportation.
Description of drawings
Fig. 1 is the schematic diagram in the cross section of traditional linear moving-coil motor.
Fig. 2 is the schematic diagram in the cross section of another kind of axial magnet traditional moving-coil motor type of being connected to closed end.
Fig. 3 is the schematic diagram in the cross section of the third traditional moving-coil motor type, and it is to use the axial magnetized cylindrical permanent magnet of a cover that is fixed on motor center.
Fig. 4 is the schematic diagram in the cross section of moving-coil motor of the present invention.
Fig. 5 is that polarity of the magnetic field of the present invention penetrated first and second coils, produces the schematic diagram of the axial force of stack when coil electricity.
Fig. 6 is the sectional view of the cylinder blanket of a series of magnetization circular arc of the present invention permanent magnet layout.
Fig. 7 is the sectional view of the cylinder blanket of the another kind of a series of magnetization circular arc permanent magnets layouts of the present invention.
Fig. 8 is the schematic diagram of arc-shaped magnet of the diametrical magnetization of unidirectional magnetiztion of the present invention.
Fig. 9 is the schematic diagram that the present invention uses complete a slice ringshaped magnet.
Figure 10 is axial magnetized permanent magnet of the present invention has the embodiment of through hole at the center a schematic diagram.
Embodiment
Further understand and understanding for making architectural feature of the present invention and the effect reached had, cooperate detailed explanation, be described as follows in order to preferred embodiment and accompanying drawing:
Fig. 4 has showed the schematic diagram in the cross section of moving-coil motor of the present invention.The moving-coil linear electric machine comprises the cylinder blanket 1 of the opening of a ferromagnetic material.Ferromagnetic material can be a cold-rolled steel like this, the stainless steel of vanadium iron cobalt magnetic alloy or 400 series.When second end of cylinder blanket was closed, first end was opened.Closed end is made of non-ferromagnetic body material, and for example having the favorable mechanical performance has more low-density aluminum to constitute again.The closed end of cylinder blanket 1 is played the part of the role of linear electric motors basis end cap.A series of magnetization arc-shaped permanent magnet (diametrical magnetization permanent magnet) the 3rd is attached to the closed end inner surface.When these arc-shaped permanent magnets 3 join 4 li of ferromagnet inner cores, their outer surface directly contacts the inwall of shell.
The permanent magnet that the longitudinal axis is arranged is placed in cylinder blanket 1 center.By ferromagnet inner core 4, axial magnetized permanent magnet 6 and three-iron magnet pole piece 7 are formed the longitudinal axis and are arranged.First end of ferromagnet inner core 4 is the inner surfaces that are connected to closed end 2.Axial magnetized permanent magnet 6 is attached to second end of ferromagnet inner core 4.Ferromagnet inner core 4 is solid block.First end of ferromagnet inner core 4 is fixing by screw 5, and screw 5 is the outer surfaces that are attached to closed end 2.This has guaranteed the rigidity of ferromagnet inner core 4 in the linear electric machine.
Second end of ferromagnet inner core 4 is first ends that are attached to axial magnetized permanent magnet 6.The second ferromagnetic pole piece 7 is placed between the openend of axial magnetized permanent magnet 6 and cylinder blanket.
The space that forms in the cylinder blanket 1 in the moving-coil assembly 8 of the non-ferromagnetic body material of being made up of two coils (first coil 9 and second coil 10) is positioned in is as the result of diametrical magnetization permanent magnet 3, ferromagnet inner core 4 and second ferromagnetic pole piece 7.Axial magnetized permanent magnet 6 and diametrical magnetization permanent magnet 3 just as shown in Figure 5, two magnetic circuits axially are being that the direction that is opposite is magnetized.
As shown in Figure 5, the polarity in magnetic field is opposite after passing first coil 9 and passing second coil 10.Therefore, first coil 9 and second coil 10 must be the coiled series connection, but different directions.When coil electricity, can produce the axial force of a stack.Though aluminium enamel-covered wire also can use, coil windings is the copper enamelled wire normally.
It also may be odd number or even number, for example 6,7,8 or more.Yet this also clearly, uses the too many part also will be along with more installation time of needs and material have increased production cost.Should also be noted that all magnet has identical magnetic polarity.These magnet use high energy product Nd-Fe-B permanent magnet usually.It has and very generally manufactures such shape and be widely used in a large amount of brushless rotating servo motors.But for brushless servo motor, magnet is generally reversed polarity is replaced, as shown in Figure 7.In Fig. 7, be provided with 8 utmost points.This is a kind of modal brushless motor design.
The arc magnet that configuration by using an axial magnet and substantial radial are arranged effectively guides by magnetization arc-shaped magnet (diametrical magnetization permanent magnet) from cylinder blanket at the magnetic flux of motor closed end.
This technology that will compare in the past improves performance.Be attached to relative smaller of axial magnet that the arc-shaped magnet of radially settling of motor closed end can be manufactured with respect to the prior art of in Fig. 3, describing.And generally little magnet space compared littler.The present invention has also reduced the cost of making.In addition, the use of minimizing of magnet space and lightweight material, for example aluminium end cap is supporting magnet, also can reduce the overall weight of motor.
Shown in Figure 6, these arc-shaped magnets do not need to fill up the full annular space.Be allowed to exist the space between the magnet.Even use these arc-shaped magnets that space is arranged, can not cause any influence to motor properties yet.Such arrangement does not need very strict size Control for simple assembling.The production cost of linear electric machine of the present invention has also reduced because the magnet space requirement reduces.The quality of motor has also improved, and helps to reduce transportation and storage cost.
For magnet, because such high-performance motor uses efficient ndfeb magnet.Use such magnet that has the gap also to reduce production cost.
Perhaps, single complete arc-shaped magnet is arranged on the position same with the arc-shaped magnet of a series of arrangements also with being used for the present invention.Though magnetic polarity is radially, a such magnet will be more expensive, as shown in Figure 9.
The magnetized arc-shaped magnet of diameter also can use, as shown in Figure 8.These magnet are permanent magnets, have only single direction with respect to radial magnet.These arc-shaped magnets are very common, are used to produce a large amount of brushless servo motors.They do not need complicated magnetizing equipment or operation, are easy to be produced with lower cost.
Figure 10 has showed that the center band of motor has the axial magnet of through hole and the structure of arc-shaped magnet circular array (or single annular radial magnet).This is feasible, because the magnetic flux in the high efficiency flow is at permanent magnet or a series of arc-shaped magnet of motor closed end by diametrical magnetization.A hole like this allows the other end of axle from the coil combination to the motor.Another example be for the user for vacuum tube by this hole, catch part with vacuum cup or other clamping devices.
In sum, it only is preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, all equalizations of doing according to the described shape of claim scope of the present invention, structure, feature and spirit change and modify, and all should be included in the claim scope of the present invention.
Claims (10)
1. one kind has axially and the twin coil motor of radial magnet combined type, it is characterized in that, comprising:
One cylinder blanket, this cylinder blanket is provided with a closed end, and this closed end extends to inner surface along the longitudinal component of this cylinder blanket to openend;
Be provided with a kernel in the center of this cylinder blanket, be provided with the ring-type air gap between this kernel and this cylinder blanket;
One coil groups moves in this annular air gap, is connected to a power supply, and this coil groups comprises the coil supporter that is located in the annular air gap, and first coil windings is shaped on coil supporter, and coiled has first polarity; Second coil windings is shaped on coil supporter, the coiled and first opposite polarity second polarity; First coil windings and second coil groups separate; The axial magnetized permanent magnet is located at the centre of first coil windings and second coil windings, makes coil windings and the second coil windings coiled series connection but direction is opposite of winning;
The permanent magnet that one longitudinal axis of being made up of the ferromagnet inner core is arranged, the permanent magnet that this longitudinal axis is arranged comprises the axial magnetized permanent magnet, and the end that the axial magnetized permanent magnet longitudinal axis is arranged is screwed on the inner surface by screw, and the axial magnetized permanent magnet has magnetized first direction; And
The permanent magnet that this longitudinal axis is arranged also comprises the diametrical magnetization permanent magnet, and the diametrical magnetization permanent magnet is attached on the inner surface of closed loop, and the diametrical magnetization permanent magnet has magnetized second direction.
2. according to claim 1 having axially and the twin coil motor of radial magnet combined type, it is characterized in that, the direction that axial magnetized permanent magnet and diametrical magnetization permanent magnet are magnetized is opposite, make that two magnetic circuits axially are opposite by first coil windings and second coil windings, when electric current passes through coil, can produce the axial force of a stack.
3. according to claim 1 and 2 having axially and the twin coil motor of radial magnet combined type, it is characterized in that magnetized first direction and magnetized second direction make the magnetic flux of linear electric machine closed end guide by the diametrical magnetization permanent magnet from cylinder blanket.
4. is characterized in that according to claim 1 having axially and the twin coil motor of radial magnet combined type, and diametrical magnetization permanent magnet annular is arranged and is made of one or more diametrical magnetization permanent magnet.
5. according to claim 1 having axially and the twin coil motor of radial magnet combined type, it is characterized in that, the first ferromagnet inner core is attached to first end on the surface, inside of cylinder blanket closed end, the second ferromagnet inner core is attached to first end of axial magnetized permanent magnet, and the axial magnetized permanent magnet is attached to second end of three-iron magnet pole piece.
6. is characterized in that the center of the permanent magnet that the longitudinal axis is arranged is provided with through hole according to claim 5 having axially and the twin coil motor of radial magnet combined type, and it allows spool from coil combination to the motor other end.
7. according to claim 5 or 6 described having axially and the twin coil motor of radial magnet combined type, it is characterized in that first end of the first ferromagnet inner core is screwed on the inner surface of cylinder blanket closed end by one or more screws.
8. according to claim 5 or 6 described having axially and the twin coil motor of radial magnet combined type, it is characterized in that first end of the first ferromagnet inner core is connected on the inner surface of cylinder blanket closed end by one or more bolts.
9. according to claim 7 having axially and the twin coil motor of radial magnet combined type, it is characterized in that the diametrical magnetization permanent magnet is a high energy arc ndfeb magnet.
10. according to claim 1 having axially and the twin coil motor of radial magnet combined type, it is characterized in that, described twin coil motor comprises axial magnetized permanent magnet and diametrical magnetization permanent magnet, it provides two magnetic circuits by one or more radial magnet, and first coil and second coil cut magnetic flux in annular air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117268XA CN102185461A (en) | 2011-05-05 | 2011-05-05 | Composite double-coil motor with axial and radial magnets |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117268XA CN102185461A (en) | 2011-05-05 | 2011-05-05 | Composite double-coil motor with axial and radial magnets |
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| CN102185461A true CN102185461A (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110117268XA Withdrawn CN102185461A (en) | 2011-05-05 | 2011-05-05 | Composite double-coil motor with axial and radial magnets |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471642A (en) * | 2013-09-27 | 2013-12-25 | 浙江大学 | Angular vibration table |
| CN104362777A (en) * | 2014-10-13 | 2015-02-18 | 北京航天控制仪器研究所 | High-stability permanent magnetic torquer |
| CN104702084A (en) * | 2013-12-10 | 2015-06-10 | 中国航空工业第六一八研究所 | Cylinder-pole opposite-vertex axial magnetic field structure for increasing voice coil motor thrust constants |
| CN107086758A (en) * | 2017-06-01 | 2017-08-22 | 哈尔滨工业大学 | A kind of cylindrical linear motion voice coil motor magnets of stator with parallel magnetic field |
| CN112838736A (en) * | 2021-03-03 | 2021-05-25 | 北京航空航天大学 | Quick deflection mirror based on four-Maxwell force linear actuator drive |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345206A (en) * | 1992-11-24 | 1994-09-06 | Bei Electronics, Inc. | Moving coil actuator utilizing flux-focused interleaved magnetic circuit |
| CN201041979Y (en) * | 2007-06-06 | 2008-03-26 | 华中科技大学 | A DC line sound coil electromotor |
| SG140482A1 (en) * | 2006-08-18 | 2008-03-28 | Akribis Systems Pte Ltd | Improved dual coil actuator with combined configuration of axial and radial magnets |
| CN202050349U (en) * | 2011-05-05 | 2011-11-23 | 雅科贝思精密机电(上海)有限公司 | Combined type twin coil motor with axial and radial magnets |
-
2011
- 2011-05-05 CN CN201110117268XA patent/CN102185461A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345206A (en) * | 1992-11-24 | 1994-09-06 | Bei Electronics, Inc. | Moving coil actuator utilizing flux-focused interleaved magnetic circuit |
| SG140482A1 (en) * | 2006-08-18 | 2008-03-28 | Akribis Systems Pte Ltd | Improved dual coil actuator with combined configuration of axial and radial magnets |
| CN201041979Y (en) * | 2007-06-06 | 2008-03-26 | 华中科技大学 | A DC line sound coil electromotor |
| CN202050349U (en) * | 2011-05-05 | 2011-11-23 | 雅科贝思精密机电(上海)有限公司 | Combined type twin coil motor with axial and radial magnets |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471642A (en) * | 2013-09-27 | 2013-12-25 | 浙江大学 | Angular vibration table |
| CN103471642B (en) * | 2013-09-27 | 2016-08-17 | 浙江大学 | A kind of angle vibration table |
| CN104702084A (en) * | 2013-12-10 | 2015-06-10 | 中国航空工业第六一八研究所 | Cylinder-pole opposite-vertex axial magnetic field structure for increasing voice coil motor thrust constants |
| CN104362777A (en) * | 2014-10-13 | 2015-02-18 | 北京航天控制仪器研究所 | High-stability permanent magnetic torquer |
| CN107086758A (en) * | 2017-06-01 | 2017-08-22 | 哈尔滨工业大学 | A kind of cylindrical linear motion voice coil motor magnets of stator with parallel magnetic field |
| CN107086758B (en) * | 2017-06-01 | 2023-08-11 | 哈尔滨工业大学 | Cylindrical linear motion voice coil motor stator magnet with parallel magnetic field |
| CN112838736A (en) * | 2021-03-03 | 2021-05-25 | 北京航空航天大学 | Quick deflection mirror based on four-Maxwell force linear actuator drive |
| CN112838736B (en) * | 2021-03-03 | 2022-01-11 | 北京航空航天大学 | Quick deflection mirror based on four-Maxwell force linear actuator drive |
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Application publication date: 20110914 |