CN202160091U - Bipolar-driven linear motor - Google Patents
Bipolar-driven linear motor Download PDFInfo
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- CN202160091U CN202160091U CN2011202591239U CN201120259123U CN202160091U CN 202160091 U CN202160091 U CN 202160091U CN 2011202591239 U CN2011202591239 U CN 2011202591239U CN 201120259123 U CN201120259123 U CN 201120259123U CN 202160091 U CN202160091 U CN 202160091U
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Abstract
A bipolar-driven linear motor belongs to the electric power driving field. The secondary part of the linear motor is in the shaped of a U-shaped groove. Permanent magnetic material is pasted on the inner sides of the two sides of the U-shaped groove. The primary part of the linear motor is composed of a plurality of iron core blocks which are positioned between the permanent magnetic material on the two sides of the U-shaped groove. And the iron core blocks can move together with a part that moves in a rectilinear manner along the U-shaped groove. A circulation cooling channel is arranged at the periphery of each iron core block. The linear motor is high in output power, high in magnetic field utilization rate and therefore high in efficiency, is simple to be manufactured to be a low-speed linear motor with huge thrust, has the cooling channels, is fine in heat radiation, helps to prevent a machine tool from heat deformation, and enables the processing precision of the numerical control machine tool to be improved. The secondary part is the U-shaped groove, the permanent magnetic material is pasted on the two sides, lower demands are needed for the positions up and down of the primary part and the secondary part, the air gap of a magnetic field is greater than one millimeter, a low precision requirement is needed, such that the linear motor is convenient in both processing and assembling.
Description
Technical field
The present invention relates to a kind of bipolar driving linear motor, it belongs to the linear permanent-magnet synchronous AC motor of field of electric drive.
Background technology
Linear electric motors commonly used at present and common electric machine are similarly on principle, can be regarded as a column type motor and cut open and flatten and form along radial direction.Be tied with part that lead produces the shifting magnetic field and be called elementaryly, the part that is moved magnetic field induction is called secondary.Kind is also identical with common electric machine, and DC linear electric motor is arranged, AC permanent-magnet linear synchronous motor, alternating current impression asynchronous linear motor, step-by-step linear electric motor etc.
Linear electric motors can be used as power part in many occasions and directly produce rectilinear motion, and needn't as the cylinder motor, must pass through rack-and-pinion, and mechanisms such as feed screw nut could produce rectilinear motion.Thereby defective such as friction of just having avoided bringing, vibration, noise, backlass, mechanical deformation, machine driving error by machine driving.Because the superior performance of linear electric motors.Use increasingly extensively in recent years, magnetic suspension train is used linear motor driving.
As the controlled linear servo-actuator of kinematic accuracy is to occur the end of the eighties in eighties of last century along with the development of control technology and sensing technology.Since German Ex-Cell-0 company in 1993 developed in the world first machining center with the linear motor driving workbench, linear electric motors were applied on different types of lathe.Linear electric motors are as the drive unit of feed system, and its maximal rate can reach 500m/mim, and acceleration can reach 30g.
But also there is heat dissipation problem in linear electric motors.On high-precision machining center, the heating of linear electric motors can directly cause the thermal deformation of lathe, influences machining accuracy.Thereby cooling measure is the technical problem of high precision machine tool design.The high speed performance of present linear electric motors is good but low-speed performance is undesirable, and low speed thrust reduces, and speed is unstable.
Summary of the invention
One of the object of the invention is that S, the N utmost point that each piece winding coil unshakable in one's determination produces magnetic field are all driven magnetic pole.Each winding two ends produces air-gap field simultaneously, and the both sides of the elementary iron core of being made up of a plurality of pieces unshakable in one's determination and secondary permanent magnet produce actuating force, and parts are moved.This bilateral magnetic field is higher than monolateral efficient, and the number of poles of motor can do often, is easy to process the linear electric motors of low-speed high-thrust.
Two of the object of the invention is that the silicon steel sheet that overcomes original technology is whole; Processing difficulties can not produce the shortcoming of air-gap field at the winding two ends, and the iron core piece that adopts is built up by silicon steel sheet; Lead is around the waist of iron core piece, and iron core piece two ends produce air-gap field.Because the quantity of iron core piece can be a lot, the progression of linear electric motors can be a lot, thereby have the low-speed high-thrust function.
Three of the object of the invention is the heat dissipation problems that solve motor.
The technical scheme that the present invention adopts is: a kind of bipolar driving linear motor mainly comprises a primary components and a secondary.Said secondary is U-lag shape parts that are installed on the support unit, posts permanent magnetic material in the inboard of U-lag shape parts both sides; Said primary components is mounted in the parts of doing the iron core piece that has winding coil on the parts that straight line that straight line moves moves relative to secondary; Cored all between the permanent magnetic material of U-lag shape parts both sides, and can move along U-lag with the parts that straight line moves; Be provided with the iron core block pressur plate in the bottom of each iron core piece, top is provided with coldplate, adopts connecting bolt to tighten together them then; The plane is provided with the cooling bath that leans on the sealing of first connecting plate on coldplate, and the coldplate and first connecting plate are fastened on the parts that straight line moves together.
Said iron core piece is wound with coil by the silicon steel sheet stack and on the silicon steel sheet heap, is provided with installing hole at the two ends of silicon steel sheet.
Central authorities at said connecting bolt are provided with through hole, in the iron core block pressur plate, are provided with cooling holes, make cooling bath, through hole and cooling holes constitute a circulation cooling circuit.
Form air-gap field between the both ends of the surface of said iron core piece and the permanent magnetic material, the spacing of air gap is 0.5～3mm.
Said secondary adopts dual U-shaped groove shape parts, posts permanent magnetic material in two inboards of each U-lag; In each U-lag of dual U-shaped groove shape parts, respectively be provided with row's iron core piece, one second connecting plate links together two row's iron core pieces; Cored all between the permanent magnetic material of U-lag both sides, and can move along U-lag with the parts that straight line moves.
The invention has the beneficial effects as follows: the secondary of this bipolar driving linear motor is U-lag shape parts that are installed on the support unit; Inboard in the U-lag both sides is provided with permanent magnetic material; Primary components is the combiner that has winding coil iron core piece; Cored all between the permanent magnetic material of U-lag both sides, and can in U-lag, move with moving-member; Be provided with the iron core block pressur plate in the bottom of each iron core piece, top is provided with coldplate, adopts connecting bolt to tighten together them then; The plane is provided with the cooling bath by the connecting plate sealing on coldplate, and coldplate and connecting plate are fastened on together can be on the parts that straight line moves.The power output of these linear electric motors is bigger, and under the identical situation of speed, thrust output is just big; The magnetic field utilance is high, thereby the efficient of linear electric motors is high; Be easy to process the linear electric motors of low-speed high-thrust; Radiating condition is good, and the cooling duct is arranged, and cooling fluid has been surrounded heat generating components, and the heating of the linear electric motors liquid that can all be cooled is taken away, and can not cause the thermal deformation of lathe, helps improving machining accuracy of NC machine tool.Because secondary is the U-lag shape, permanent magnetic material is attached to both sides, the upper-lower position of primary and secondary relation is required very low, and the air gap in magnetic field is greater than 1 millimeter, and required precision is lower, thereby the processing of these linear electric motors and assembling are all very convenient.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is a kind of stereochemical structure schematic diagram of bipolar driving linear motor.
Fig. 2 is the B-B profile of Fig. 1.
Fig. 3 is the A-A profile of Fig. 2.
Fig. 4 is the C-C profile of Fig. 3.
Fig. 5 is the structural representation of an iron core piece.
Fig. 6 is a structural representation that adopts double iron core piece.
Among the figure: 1, first set bolt, 2, U-lag shape parts, 2a, connect convex shoulder, 2b, connecting hole, 3, connecting bolt, 3a, through hole; 4, second set bolt, 5, coldplate, 5a, cooling bath, 6, the iron core piece, 6a, silicon steel sheet; 6b, coil, 6c, installing hole, 7, first connecting plate, 8, the iron core block pressur plate, 8a, cooling holes; 9, permanent magnetic material, 10, support unit, 11, the parts that move of straight line, 12, dual U-shaped groove shape parts, 13, second connecting plate.
Embodiment
Fig. 1,2 shows a kind of bipolar driving linear motor primary structure.The secondary of these linear electric motors is U-lag shape parts 2 that are installed on the support unit 10; Permanent magnetic material 9 is posted in inboard in U-lag shape parts 2 both sides; Primary components is mounted in the parts of doing the iron core piece 6 that has winding coil on the parts 11 that straight line moves relative to secondary; Iron core piece 6 is all between the permanent magnetic material 9 of U-lag shape parts 2 both sides, and the parts that can move with straight line 11 move along U-lag.Be provided with iron core block pressur plate 8 in the bottom of each iron core piece 6, top is provided with coldplate 5, adopts connecting bolt 3 to tighten together them then.The plane is provided with the cooling bath 5a that leans on 7 sealings of first connecting plate on coldplate 5, and the coldplate 5 and first connecting plate 7 are fastened on the parts 11 that straight line moves together.
Fig. 3,4 illustrates, and these linear electric motors have adopted 30 iron core pieces 6.The speed of bipolar driving linear motor is adjusted through following two approach: the quantity that one, changes the iron core piece.Because electrical network is a three-phase alternating current, frequency is 50 hertz.Therefore the quantity of iron core piece should be 3 multiple.Number of pole-pairs is that one linear electric motors should have 6 (or 3) iron core pieces, linear electric motors fastest.Number of pole-pairs is that 10 linear electric motors have 30 iron core pieces, and the rotating speed of linear electric motors is wanted slow 10 times.Two, frequency modulation speed change: the method for frequency modulation is ac-dc-ac inverter normally.Become direct current to three-phase alternating current, become the a-c cycle that needs again.This conversion method is a conversion method commonly used on the Digit Control Machine Tool, and frequency is fast at a high speed.Requiring under the situation of low speed high torque, in order to reduce slot ripples, overcoming the torque pulsation of motor, this motor can also adopt fractional slot winding.
Fig. 5 illustrates, and iron core piece 6 is wound with coil 6b by silicon steel sheet 6a stack and on the silicon steel sheet heap, is provided with installing hole 6c at the two ends of silicon steel sheet 6a.Fig. 2 illustrates, and the central authorities of connecting bolt 3 are provided with through hole 3a, in iron core block pressur plate 8, is provided with cooling holes 8a, makes cooling bath 5a, through hole 3a and cooling holes 8a constitute a circulation cooling circuit.Cooling fluid can be passed through around elementary iron core, and cooling fluid has been surrounded elementary iron core, and cooling fluid can be taken away the caloric value of motor fully, can not cause the thermal deformation of lathe.
Fig. 6 shows a kind of structural representation that adopts double iron core piece.Double iron core piece is installed in the dual U-shaped groove shape parts 12, posts permanent magnetic material 9 in two inboards of each U-lag; In each U-lag of dual U-shaped groove shape parts 12, respectively being provided with 6, one second connecting plates 13 of row's iron core piece links together two row's iron core pieces 6.Cored 6 all between the permanent magnetic material 9 of U-lag both sides, and can move along U-lag with the parts that straight line moves.
From the above, iron core piece 6 is formed elementary iron core, and the shape of each iron core piece 6 is just the same.Each iron core piece is built up by many silicon steel sheets.At the waist winding around winding of each iron core piece, winding energising back produces needed magnetic field at the two ends of iron core piece, and S, the effect of N magnetic pole with U-lag both sides permanent magnet are used for driving moving-member.There is the hole of wearing bolt at each iron core piece two ends, is fixed on the coldplate 5 with connecting bolt 3 and iron core block pressur plate 8.Coldplate 5 is screwed on first connecting plate 7, has formed a primary element.On Digit Control Machine Tool, can this primary element be fixed on the moving-member (like the moving beam of workbench, saddle, Longmen machine tool) with second set bolt 4, replace the ball-screw driver part to move.Realize the multi-coordinate interlock or the fast moving of Digit Control Machine Tool processing.Post permanent magnetic material 9 on the two inboard cell walls of U-lag shape parts 2, elementary iron core is contained in the groove, forms the magnetic field air gap with secondary permanent magnet, and elementary iron core, magnetic field air gap, permanent magnet, U-lag wall form closed magnetic circuit.Be contained in primary element on the moving-member earlier during assembling, and make the air-gap surface of iron core parallel with guide rail, the joint face of first connecting plate 7 is parallel with guide rail.U-lag shape parts 2 usefulness first set bolt 1 is fixed on the supporting member (like lathe bed, column, the crossbeam of lathe).And make the fitting surface of U-lag shape parts 2 parallel with guide rail with the two sides of posting permanent magnet.The magnetic field air gap that will guarantee both sides when installing to primary components in the U-lag shape parts 2 equates that the upper-lower position of elementary iron core and secondary permanent magnet is suitable.Because position accuracy demand is not high, processing and assembling are all very convenient.Adopt the situation of dual U-shaped groove shape parts 12 same as described above, no longer repeat.
According to the thrust requirement, the size of iron core piece can change, and thrust requires when big, and the iron core piece can be greatly, and long, the coiling line directly can be slightly; According to rate request, the quantity of iron core piece can change, and the quantity of iron core piece can be some more during low speed, and the number of poles of motor can be some more.
Above-mentioned bipolar driving linear motor and grating chi are used can realize the control of full cut-off ring; Improved machining accuracy; Be used in and replace ball-screw directly to drive on the high-precision numerical control machine; The defective of having avoided mechanical drive train to bring has improved rigidity and positioning accuracy, effectively raises machining accuracy.
Claims (5)
1. bipolar driving linear motor, it mainly comprises a primary components and a secondary; It is characterized in that: said secondary is U-lag shape parts (2) that are installed on the support unit (10), posts permanent magnetic material (9) in the inboard of U-lag shape parts (2) both sides; Said primary components is mounted in the parts of doing the iron core piece (6) that has winding coil on the parts (11) that straight line that straight line moves moves relative to secondary; Cored (6) all be positioned between the permanent magnetic material (9) of U-lag shape parts (2) both sides, and can move along U-lag with the parts (11) that straight line moves; Be provided with iron core block pressur plate (8) in the bottom of each iron core piece (6), top is provided with coldplate (5), adopts connecting bolt (3) to tighten together them then; Be provided with the cooling bath (5a) that leans on first connecting plate (7) sealing on the last plane of coldplate (5), coldplate (5) and first connecting plate (7) are fastened on the parts (11) that straight line moves together.
2. according to the described a kind of bipolar driving linear motor of claim 1; It is characterized in that: said iron core piece (6) is wound with coil (6b) by silicon steel sheet (6a) stack and on the silicon steel sheet heap, is provided with installing hole (6c) at the two ends of silicon steel sheet (6a).
3. according to the described a kind of bipolar driving linear motor of claim 1; It is characterized in that: the central authorities at said connecting bolt (3) are provided with through hole (3a), in iron core block pressur plate (8), are provided with cooling holes (8a), make cooling bath (5a), through hole (3a) and cooling holes (8a) constitute a circulation cooling circuit.
4. according to the described a kind of bipolar driving linear motor of claim 1; It is characterized in that: form air-gap field between the both ends of the surface of said iron core piece (6) and the permanent magnetic material (9), the spacing of air gap is 0.5～3mm.
5. according to the described a kind of bipolar driving linear motor of claim 1; It is characterized in that: said secondary adopts dual U-shaped groove shape parts (12), posts permanent magnetic material (9) in two inboards of each U-lag; In each U-lag of dual U-shaped groove shape parts (12), respectively be provided with row's iron core piece (6), one second connecting plate (13) links together two row's iron core pieces (6); Cored (6) all be positioned between the permanent magnetic material (9) of U-lag both sides, and can move along U-lag with the parts that straight line moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202591239U CN202160091U (en) | 2011-07-20 | 2011-07-20 | Bipolar-driven linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202591239U CN202160091U (en) | 2011-07-20 | 2011-07-20 | Bipolar-driven linear motor |
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| Publication Number | Publication Date |
|---|---|
| CN202160091U true CN202160091U (en) | 2012-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202591239U Expired - Fee Related CN202160091U (en) | 2011-07-20 | 2011-07-20 | Bipolar-driven linear motor |
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| Country | Link |
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| CN (1) | CN202160091U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584792A (en) * | 2017-10-26 | 2018-01-16 | 西安电子科技大学 | A kind of linear drives high-speed blanking press |
| CN117498643A (en) * | 2023-12-26 | 2024-02-02 | 深圳线马科技有限公司 | Double-sided magnet type linear motor |
-
2011
- 2011-07-20 CN CN2011202591239U patent/CN202160091U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584792A (en) * | 2017-10-26 | 2018-01-16 | 西安电子科技大学 | A kind of linear drives high-speed blanking press |
| CN107584792B (en) * | 2017-10-26 | 2019-09-10 | 西安电子科技大学 | A kind of linear drives high-speed blanking press |
| CN117498643A (en) * | 2023-12-26 | 2024-02-02 | 深圳线马科技有限公司 | Double-sided magnet type linear motor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20130720 |