CN1885692A - Built-in type permanent-magnet linear motor - Google Patents
Built-in type permanent-magnet linear motor Download PDFInfo
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- CN1885692A CN1885692A CN 200610085450 CN200610085450A CN1885692A CN 1885692 A CN1885692 A CN 1885692A CN 200610085450 CN200610085450 CN 200610085450 CN 200610085450 A CN200610085450 A CN 200610085450A CN 1885692 A CN1885692 A CN 1885692A
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Abstract
The built-in permanent magnetic linear motor comprises: a primary iron core (1) and coiling (2) opposite to (4), a secondary Halbach permanent magnet (3) opposite to (1) and iron core (4), and the pole shoes (5) on (3) to hold some gap with (1), wherein the magnetizing direction for (3) is clockwise and rotated every 90deg. This invention releases load of compensation system, and has wide application.
Description
Technical field
The present invention is a kind of novel permanent magnetic linear electric motors that can be applied to bullet train, Digit Control Machine Tool, magnetic suspension emission, realizes that stator and moving component are contactless, does not have friction, belongs to the technical field that linear electric motors are made.
Technical background
The linear electric motors magnetic levitation technology is based on the interaction of electromagnetic force between stator (the first utmost point) and rotor (the inferior utmost point).This interaction force is divided into the power of lead and the power of suspension direction, and suspending power is mainly provided by the magnetic field of the inferior utmost point, and tractive effort is mainly formed by the action of a magnetic field that first utmost point winding three-phase electric current produces.
High-speed maglev train is a wherein example of the application of linear electric motors.High-speed maglev train is that locomotive and interorbital are carried out contactless moving with large-scale AC frequency conversion power supply power supply, with the long stator synchronous linear motor traction.The advantage of this operational mode is that operation does not have friction, adopts the electric energy power supply pollution-free, energy-efficient, is current unique can reaching.500 kilometers/time overall trip speed the ground passenger vehicles, the high speed passenger transportation in mainly being applicable to, between long distance, bus's flow, big city.
The Another application of linear electric motors is in the precise numerical control machine feeding, the rectilinear motion of parts in the traditional machine tool system, great majority are driven by the revolution one straight line transducer of electric rotating machine and ball screw assembly, class, there is friction in this type of belt drive, causes that low acceleration performance, recoil, mechanism's complexity and shock loading ability are low etc.Linear electric motors are a kind ofly electric energy to be directly changed into rectilinear motion mechanical energy and need be by the novel linear drive unit of any intermediate conversion mechanism, can remedy the deficiency of traditional kind of drive, its speed is 30 times of ball wire bar pair, acceleration is 10 times of ball wire bar pair, maximum can reach 10g, rigidity has improved 7 times, and positioning accuracy and repetitive positioning accuracy can reach micron order, even nanoscale.
The application of permanent-magnetism linear motor is more and more wider, because our country is a rare earth permanent-magnetic material big country, permanent magnetic material provides highdensity magnetic energy product, substitute loop construction, make simple in structure, but the suspending power that permanent magnet provides is lower with time utmost point weight ratio, and influences the application of permanent-magnetism linear motor.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of built-in type permanent-magnet linear motor, these linear electric motors have that operational speed range is wide, the electromagnetic force fluctuation is little, operate steadily.
Technical scheme:
1) adopts the built-in type permanent-magnet structure, can make the linear electric motors operational speed range wide, carry out weak magnetic control system, obtain good runnability.
2) Halbach permanent magnet (for a kind of permanent magnet of naming with the Halbach name) only produces sine wave magnetic field in the space, has overcome the harmonic field that common permanent magnet produces, and improves the performance of linear electromagnetic power.
3) think ratio with non-built-in structure of the linear motion actuator,, adopt the built-in type permanent-magnet structure, do not reduce the suspending power of linear electric motors as long as air gap height does not change.
Built-in type permanent-magnet linear motor of the present invention comprises just extremely iron core, first utmost point winding, inferior utmost point Halbach permanent magnet, secondary core, pole shoe; Promptly the side towards secondary core is provided with utmost point winding just in inboard just extremely unshakable in one's determination, inboard at secondary core promptly is provided with time utmost point Halbach permanent magnet towards a side just extremely unshakable in one's determination, on inferior utmost point Halbach permanent magnet, be provided with pole shoe, pole shoe and just extremely leave the gap between the iron core.The magnetizing direction of inferior utmost point Halbach permanent magnet is that clockwise direction rotates at interval with 90 degree.Pole shoe is made up of the soft magnetic material silicon steel sheet.
This structure can provide stable electromagnetic force, compares with the generic linear motor, has alleviated the burden of compensation control system, makes control system simple.Adopt built-in structure simultaneously, realize weak magnetic control system, optimize the linear electric motors runnability.
Beneficial effect: permanent-magnetism linear motor of the present invention adopts the Halbach array structure, and first-harmonic (sine wave) main field is provided, and makes the electromagnetic force of linear electric motors steady, improves the bearing capacity of linear electric motors.Adopt built-in structure, leakage field has increase slightly, but the linear electric motors variable-speed operation is functional.Influence weakens the demagnetizing effect of linear electric motors to permanent magnet itself, and simultaneously, as long as the air gap of linear electric motors is constant, built-in structure is to the almost not influence of suspending power of motor.Built-in type permanent-magnet linear motor is realized weak magnetic control system easily, optimizes the tractive effort of linear electric motors.
Description of drawings
Fig. 1 is the structural representation of permanent-magnetism linear motor of the present invention.
Fig. 2 is time utmost point Halbach structural representation that magnetizes.
Have among the above figure: just extremely unshakable in one's determination 1, first utmost point winding 2, inferior utmost point Halbach permanent magnet 3, secondary core 4, pole shoe 5.
Embodiment
Though permanent-magnetism linear motor is applied in machine tool control system, but common permanent-magnet linear motor is extremely gone up the magnetic field that can not provide along the space Sine distribution inferior, so harmonic field will produce the harmonic wave suspending power, make linear electric motors produce fluctuation, influence the runnability of linear electric motors.In order to break this limitation, we propose the novel permanent magnetic motor of a kind of many windings, Halbach p-m rotor, and as shown in Figure 1, elementary have winding to pass through three-phase current, produce travelling-magnetic-field, produce tractive effort on secondary, impel time utmost point to produce motion.Halbach permanent magnet, its magnetizing direction are pressed Fig. 2 and are arranged, so it can produce a Sine distribution magnetic field in the space.It produces high-intensity magnetic field above magnet, and magnetic field below the magnet a little less than; Pole shoe 5, it have several advantages: 1) aspect the structure installation, be convenient to fixed permanent magnet; 2) reduce the demagnetizing effect of the inductive reaction of utmost point winding current generation just to permanent magnet; 3) make linear electric motors realize weak magnetic control system easily.
This motor comprises just extremely iron core 1, first utmost point winding 2, inferior utmost point Halbach permanent magnet 3, secondary core 4, pole shoe 5; Promptly be provided with utmost point winding 2 just in first extremely unshakable in one's determination 1 inboard towards a side of secondary core 4, inboard at secondary core 4 promptly is provided with time utmost point Halbach permanent magnet 3 towards a first extremely side of unshakable in one's determination 1, on inferior utmost point Halbach permanent magnet 3, be provided with pole shoe 5, pole shoe 5 and just leave the gap between extremely unshakable in one's determination 1.The magnetizing direction of inferior utmost point Halbach permanent magnet 3 is that clockwise direction rotates at interval with 90 degree.
1. the first extremely unshakable in one's determination of linear electric motors is made up of the firm sheet of silicon, and manufacturing process is identical with the manufacturing process of generic linear motor.
2. pole shoe also is made up of silicon steel sheet, and it is fixed on Halbach permanent magnet outside, on structure, is used for fixing the Halbach permanent magnet, because magnet structure is fragile.
3.Halbach permanent magnet is made up of the polylith permanent magnet, the magnetizing direction between every permanent magnet has a certain degree, and forms the Halbach array, and the magnetizing direction angle that Fig. 2 lists is 90 °, also has 45 °, 60 °.
4. these linear electric motors can suspend when first utmost point winding is not switched on, and when utmost point winding led to three-phase alternating current, linear electric motors can move, moving linearly.
Claims (3)
1. a built-in type permanent-magnet linear motor is characterized in that this motor comprises (1), first utmost point winding (2) just extremely unshakable in one's determination, inferior utmost point Halbach permanent magnet (3), secondary core (4), pole shoe (5); Promptly be provided with utmost point winding (2) just in the first inboard of (1) extremely unshakable in one's determination towards a side of secondary core (4), in the inboard of secondary core (4) promptly towards just extremely a side of (1) unshakable in one's determination be provided with time utmost point Halbach permanent magnet (3), on inferior utmost point Halbach permanent magnet (3), be provided with pole shoe (5), pole shoe (5) and just leave the gap between (1) extremely unshakable in one's determination.
2. built-in type permanent-magnet linear motor according to claim 1, the magnetizing direction that it is characterized in that time utmost point Halbach permanent magnet (3) are that clockwise direction rotates at interval with 90 degree.
3. built-in type permanent-magnet linear motor according to claim 1 is characterized in that pole shoe (5) is made up of the soft magnetic material silicon steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610085450 CN1885692A (en) | 2006-06-16 | 2006-06-16 | Built-in type permanent-magnet linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610085450 CN1885692A (en) | 2006-06-16 | 2006-06-16 | Built-in type permanent-magnet linear motor |
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| Publication Number | Publication Date |
|---|---|
| CN1885692A true CN1885692A (en) | 2006-12-27 |
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| CN 200610085450 Pending CN1885692A (en) | 2006-06-16 | 2006-06-16 | Built-in type permanent-magnet linear motor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741214A (en) * | 2010-03-10 | 2010-06-16 | 哈尔滨工业大学 | Built-in permanent magnet dual-side flat plate type linear motor |
| CN101771326A (en) * | 2010-02-11 | 2010-07-07 | 哈尔滨工业大学 | Cylindrical linear motor with double-layer air gaps |
| CN101777821A (en) * | 2010-04-12 | 2010-07-14 | 哈尔滨工业大学 | Concentrated-winding multi-segment permanent magnet synchronous linear motor |
| CN101951114A (en) * | 2010-10-08 | 2011-01-19 | 中南大学 | Permanent-magnetic suspension supporting cylindrical linear motor |
| CN101527493B (en) * | 2009-04-27 | 2011-02-02 | 青岛同日电机有限公司 | Moving magnet-type cylindrical linear motor |
| CN102332807A (en) * | 2011-09-07 | 2012-01-25 | 上海海洋大学 | Flexible magnetic fluid wave energy generation device |
| CN102138273B (en) * | 2008-09-03 | 2013-11-06 | 伯斯有限公司 | Linear motor with patterned magnet arrays |
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
| CN109039002A (en) * | 2018-07-16 | 2018-12-18 | 华中科技大学 | A kind of built-in vernier permanent-magnetism linear motor of permanent magnet |
| CN111480999A (en) * | 2020-04-16 | 2020-08-04 | 陆伟 | Use method of household stable drawer |
-
2006
- 2006-06-16 CN CN 200610085450 patent/CN1885692A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102138273B (en) * | 2008-09-03 | 2013-11-06 | 伯斯有限公司 | Linear motor with patterned magnet arrays |
| CN101527493B (en) * | 2009-04-27 | 2011-02-02 | 青岛同日电机有限公司 | Moving magnet-type cylindrical linear motor |
| CN101771326A (en) * | 2010-02-11 | 2010-07-07 | 哈尔滨工业大学 | Cylindrical linear motor with double-layer air gaps |
| CN101741214A (en) * | 2010-03-10 | 2010-06-16 | 哈尔滨工业大学 | Built-in permanent magnet dual-side flat plate type linear motor |
| CN101777821A (en) * | 2010-04-12 | 2010-07-14 | 哈尔滨工业大学 | Concentrated-winding multi-segment permanent magnet synchronous linear motor |
| CN101951114A (en) * | 2010-10-08 | 2011-01-19 | 中南大学 | Permanent-magnetic suspension supporting cylindrical linear motor |
| CN101951114B (en) * | 2010-10-08 | 2012-07-25 | 中南大学 | Permanent-magnetic suspension supporting cylindrical linear motor |
| CN102332807A (en) * | 2011-09-07 | 2012-01-25 | 上海海洋大学 | Flexible magnetic fluid wave energy generation device |
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
| CN109039002A (en) * | 2018-07-16 | 2018-12-18 | 华中科技大学 | A kind of built-in vernier permanent-magnetism linear motor of permanent magnet |
| CN111480999A (en) * | 2020-04-16 | 2020-08-04 | 陆伟 | Use method of household stable drawer |
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Open date: 20061227 |