CN101774476B - Permanent magnet linear motor-based throwing platform - Google Patents
Permanent magnet linear motor-based throwing platform Download PDFInfo
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- CN101774476B CN101774476B CN200910226782XA CN200910226782A CN101774476B CN 101774476 B CN101774476 B CN 101774476B CN 200910226782X A CN200910226782X A CN 200910226782XA CN 200910226782 A CN200910226782 A CN 200910226782A CN 101774476 B CN101774476 B CN 101774476B
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Abstract
The invention discloses a permanent magnet linear motor-based throwing platform, which comprises a base, two oppositely arranged iron yoke backplates, stator teeth, a permanent magnet rotor, an eddy current braking device and a control mechanism, wherein the iron yoke backplates are fixed on the base; each iron yoke backplate is provided with more than one row of stator teeth along the height direction; two stator teeth at corresponding positions on the different iron yoke backplates form a group; the stator teeth are wound with a three-phase winding connected with the control mechanism; the permanent magnet rotor is arranged in a motion channel formed between the two iron yoke backplates; the motion channel is divided into a front-end accelerating section and a tail-end braking section along the motion acceleration direction of the permanent magnet rotor; and the tail-end braking section is provided with the eddy current braking device. The permanent magnet linear motor-based throwing platform has the advantages of simple and compact structure, low cost, good reliability, large throwing force, and stable structure.
Description
Technical field
The present invention is mainly concerned with the application of permanent-magnetism linear motor, refers in particular to a kind of throwing platform that adopts permanent-magnetism linear motor.
Background technology
Throwing platform has wide application, as large far products, industrial goods, aerospace etc.Throwing platform in the past has and adds based on rotating machine that belt transmits, and air pressure, hydraulic pressure are also arranged, and also has based on rubber band etc. elastomericly, and aerospace then also may be used the bigger throwing of thrust and send device.Though belt transmits certain controllability is arranged, its ring dead band that stagnates is uncontrollable section that can't overcome.That other gas-liquids are pressed, rubber band or the like throw and send device then controllability is very poor, sent the stress of object to require to throwing, structural requirement is all very high.Above-mentioned tradition is thrown and is sent the efficient of device not high.
Permanent-magnetism linear motor is used as throwing platform, has then realized throwing the controlled fully of journey of seeing off, and electric energy is converted into by throwing and send the efficient of object kinetic energy to reach more than 80%.Advantages such as that permanent-magnetism linear motor has is simple in structure, control convenient, pushing force density is big are that the ideal that is used for throwing platform is selected.Big as far as possible for permanent-magnetism linear motor is exerted oneself, structure is firm as far as possible, and acceleration distance is long as far as possible, can adopt bilateral form to double thrust, adopts the moving magnet motor to avoid dragging line.
Permanent-magnetism linear motor is used for folk prescription when weight is sent in throwing, the round trip of permanent-magnetism linear motor can be done asymmetricly, be that the mover braking also needed very fast after working stroke needed mover and quilt throwing to send object to quicken soon, send object, and mover itself only need return at a slow speed during return of stroke, not influencing acting next time and getting final product.This application background provides condition for the braking of implementing the permanent-magnetism linear motor mover by structure design.
Summary of the invention
The technical problem to be solved in the present invention just is: at the technical matters that prior art exists, the invention provides a kind of simple and compact for structure, with low cost, good reliability, the throwing platform based on permanent-magnetism linear motor that power is big, structure is firm is sent in throwing.
For solving the problems of the technologies described above, the present invention by the following technical solutions.
A kind of throwing platform based on permanent-magnetism linear motor, it is characterized in that: comprise base, two iron yoke backboards that are positioned opposite, stator tooth, the permanent magnet mover, eddy current brake device and control mechanism, described iron yoke backboard is fixed on the base, on the described every iron yoke backboard along short transverse be equipped with one row more than stator tooth, two stator tooths at opposite position place constitute one group on the different iron yoke backboards, be arranged with three phase windings that link to each other with control mechanism on the described stator tooth, described permanent magnet mover is installed in the moving conduit that forms between two iron yoke backboards, acceleration direction along the motion of permanent magnet mover, described moving conduit is divided into front end accelerating sections and tail end retaining segment, is equiped with the eddy current brake device on the described tail end retaining segment.
As a further improvement on the present invention:
The correspondence position of described two iron yoke backboards is provided with the guide rail of one or more, and the side of described permanent magnet mover is slidedly arranged on the guide rail.
The side of described permanent magnet mover is provided with roller, and described roller is slidedly arranged on the guide rail.
The underrun roller of described permanent magnet mover is slidedly arranged on the base.
The tail end of described guide rail is provided with more than one guide rail retarding spring.
The described stator tooth that is positioned at the front end accelerating sections is a silicon steel laminations formula stator tooth, and the described stator tooth that is positioned at the tail end retaining segment is real core iron formula stator tooth, and described real core iron formula stator tooth constitutes the eddy current brake device.
Described base is provided with baffle plate, and described baffle plate is arranged at the tail end of iron yoke backboard, and described baffle plate is provided with more than one retarding spring.
The position detecting device that described control mechanism and is used for detecting permanent magnet mover movement position links to each other.
Compared with prior art, advantage of the present invention just is: the present invention is based on the throwing platform of permanent-magnetism linear motor, simple and compact for structure, with low cost, good reliability adopt the design of bilateral formula permanent-magnetism linear motor, thereby have improved thrust greatly; Adopt the permanent magnet mover, cause fault thereby avoided dragging power cable back and forth.The present invention adopts the structure of real core stator tooth at the tail end retaining segment, can shorten the braking time and the stopping distance of permanent magnet mover greatly, send acceleration distance thereby extended relatively to throw, motor can be thrown under the condition of same output power send quality bigger weight.
Description of drawings
Fig. 1 is a plan structure scheme drawing of the present invention;
Fig. 2 is the sectional structure scheme drawing at A-A place among Fig. 1;
Fig. 3 is a partial side TV structure scheme drawing of the present invention;
Fig. 4 is the main TV structure scheme drawing that is arranged in front end accelerating sections stator tooth;
Fig. 5 is the plan structure scheme drawing that is arranged in front end accelerating sections stator tooth;
Fig. 6 is the side-looking structural representation that is arranged in front end accelerating sections stator tooth;
Fig. 7 is the main TV structure scheme drawing that is arranged in tail end retaining segment stator tooth;
Fig. 8 is the plan structure scheme drawing that is arranged in tail end retaining segment stator tooth;
Fig. 9 is the side-looking structural representation that is arranged in tail end retaining segment stator tooth.
Marginal data
1, base; 101, baffle plate; 2, retarding spring; 3, stator tooth; 4, permanent magnet mover; 41, roller; 42, roller; 401, framework; 402, permanent magnet; 5, eddy current brake device; 6, control mechanism; 7, iron yoke backboard; 71, moving conduit; 711, front end accelerating sections; 712, tail end retaining segment; 72, guide rail; 721, guide rail retarding spring; 8, position detecting device.
The specific embodiment
Below with reference to specific embodiment and Figure of description the present invention is described in further details.
As Fig. 1, Fig. 2 and shown in Figure 3, the present invention is based on the throwing platform of permanent-magnetism linear motor, comprise base 1, two iron yoke backboard 7, stator tooth 3, permanent magnet mover 4, eddy current brake device 5 and control mechanisms 6 that are positioned opposite, iron yoke backboard 7 is fixed on the base 1, base 1 is provided with baffle plate 101, baffle plate 101 is arranged at the tail end of iron yoke backboard 7, and baffle plate 101 is provided with more than one retarding spring 2.Along short transverse stator tooth 3 more than one row is installed on every iron yoke backboard 7, two stator tooths 3 at opposite position place constitute one group on the different iron yoke backboards 7, constitute the double-flanged end permanent-magnetism linear motor, and this permanent-magnetism linear motor has only folk prescription to effective travel, and the present invention manufactures a kind of platform that send weight of throwing towards a certain specific direction with permanent-magnetism linear motor.Many row's stator tooths 3 can effectively strengthen the thrust to permanent magnet mover 4.Be arranged with three phase windings that link to each other with control mechanism 6 on the stator tooth 3, three phase windings are drawn by connection terminal, and by the three phase inverter bridge power supply, The whole control mechanism 6 is controlled by the control method of traditional brshless DC motor.Permanent magnet mover 4 comprises framework 401 and permanent magnet 402, and permanent magnet 402 is wrapped in the framework 401, and framework 401 tops are used for placing waiting to throw send object.Permanent magnet 402 sizes will cooperate with three phase windings on the stator tooth 3, i.e. corresponding three phase windings in the two poles of the earth of permanent magnet 402, and both degree of depth will equate.The correspondence position of two iron yoke backboards 7 is provided with the guide rail 72 of one or more, the side of permanent magnet mover 4 is slidedly arranged on the guide rail 72 by roller 42, the underrun roller 41 of permanent magnet mover 4 is slidedly arranged on the base 1, and the tail end of guide rail 72 is provided with more than one guide rail retarding spring 721.
Referring to Fig. 4, Fig. 5 and Fig. 6, the stator tooth 3 that is positioned at front end accelerating sections 711 is silicon steel laminations formula stator tooth, in order to avoid the vortes interference motor quickens.Referring to Fig. 7, Fig. 8 and Fig. 9, the stator tooth 3 that is positioned at tail end retaining segment 712 is real core iron formula stator tooth, and real core iron formula stator tooth constitutes eddy current brake device 5, with the braking force that makes full use of the eddy current that forms in the real core iron permanent magnet mover 4 is braked rapidly.When making, some groups of stator tooths 3 can be made together, be installed on the iron yoke backboard 7 by fastener, the earlier independent coiling of three-phase winding coil on each stator tooth 3 is simultaneously also reserved joint, after being set on the stator tooth 3, welded together by brass between joint, can connect also can be in parallel.
Whole motor is in installation process, and first emphasis is the adjustment of straightness accuracy, and the straight line degree of permanent-magnetism linear motor will directly influence the operation of motor, and straightness accuracy can be by the Special Equipment adjustment.Second emphasis is permanent magnet mover 4 these processes in the middle of the stator tooth 3 of packing on two iron yoke backboards 7.Must guarantee in the installation process that permanent magnet mover 4 is not adsorbed on any side stator tooth 3, this can realize by the method for both sides pad non-magnet material.When permanent magnet 402 was packed framework 401 into, two rows can also stagger certain distance to reduce the intrinsic teeth groove detent force of permanent-magnetism linear motor.
After whole motor assembling is finished, just can switch on and move.Before the operation, will be sent on the platform that object places permanent magnet mover 4 middle frames 401 tops, and limit that it is left and right, the back three degree of freedom by throwing.Motor is controlled according to the control method of common permanent magnet DC motor, position detecting device 8 detects when permanent magnet mover 4 arrives tail end retaining segment 712 (eddy current brake sections) and comes into effect braking, and the modes such as resistance braking, reversing braking, regenerative brake of can adding cooperate eddy current brake.After permanent magnet mover 4 begins braking, thrown and send object to dish out by inertia.After permanent magnet mover 4 is finished effective travel,, wait to be performed next time the throwing to send by adding negative phase sequence electric current return to origin at a slow speed.
In braking procedure, mainly realize by eddy current brake device 5.This electric eddy speed reducing principle is to utilize the current vortex that conductor produced and himself the resistance combined action of making cutting magnetic line movement in electromagnetic field to generate joule heat, makes the kinetic energy of mobile change into heat energy, thereby realizes brake snub.This brake mode does not have direct contact, does not have wearing and tearing thereby do not produce friction, in very big speed range inside brake power higher numerical value is arranged all.Calculate as can be known with finite element numerical by analytical Calculation: eddy current brake power becomes the monotonic increasing function relation with the square root of speed; Eddy current brake power will be greater than the rated thrust, nominal thrust of motor when mover speed surpasses a certain value, promptly greater than reversing braking power, thereby plays the effect of main resistance.Hence one can see that, and after adopting above-mentioned permanent-magnetism linear motor structure, stopping distance approximately can be than only using the reversing braking required separation distance to shorten half, the acceleration distance of the permanent-magnetism linear motor that extended greatly.
The above only is a preferred implementation of the present invention, and protection scope of the present invention also not only is confined to the foregoing description, and all technical schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be pointed out that for those skilled in the art in the some improvements and modifications that do not break away under the principle of the invention prerequisite, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. throwing platform based on permanent-magnetism linear motor, it is characterized in that: comprise base (1), two iron yoke backboards (7) that are positioned opposite, stator tooth (3), permanent magnet mover (4), eddy current brake device (5) and control mechanism (6), described iron yoke backboard (7) is fixed on the base (1), described every iron yoke backboard (7) is gone up along short transverse stator tooth (3) more than one row is installed, two stator tooths (3) that different iron yoke backboards (7) are gone up the opposite position place constitute one group, be arranged with three phase windings that link to each other with control mechanism (6) on the described stator tooth (3), described permanent magnet mover (4) is installed in the moving conduit (71) that forms between two iron yoke backboards (7), acceleration direction along permanent magnet mover (4) motion, described moving conduit (71) is divided into front end accelerating sections (711) and tail end retaining segment (712), is equiped with eddy current brake device (5) on the described tail end retaining segment (712); Described permanent magnet mover (4) comprises framework (401) and permanent magnet (402), described permanent magnet (402) is wrapped in the framework (401), described framework (401) top is used for placing waiting to throw send object, described permanent magnet (402) size cooperates i.e. both deep equalities with last three phase windings of stator tooth (3); The described stator tooth (3) that is positioned at front end accelerating sections (711) is a silicon steel laminations formula stator tooth, and the described stator tooth (3) that is positioned at tail end retaining segment (712) is real core iron formula stator tooth, and described real core iron formula stator tooth constitutes eddy current brake device (5).
2. the throwing platform based on permanent-magnetism linear motor according to claim 1 is characterized in that: the correspondence position of described two iron yoke backboards (7) is provided with the guide rail (72) of one or more, and the side of described permanent magnet mover (4) is slidedly arranged on the guide rail (72).
3. the throwing platform based on permanent-magnetism linear motor according to claim 2 is characterized in that: the side of described permanent magnet mover (4) is provided with roller (42), and described roller (42) is slidedly arranged on the guide rail (72).
4. the throwing platform based on permanent-magnetism linear motor according to claim 2 is characterized in that: the underrun roller (41) of described permanent magnet mover (4) is slidedly arranged on the base (1).
5. the throwing platform based on permanent-magnetism linear motor according to claim 2 is characterized in that: the tail end of described guide rail (72) is provided with more than one guide rail retarding spring (721).
6. according to claim 1 or 2 or 3 or 4 or 5 described throwing platforms based on permanent-magnetism linear motor, it is characterized in that: described base (1) is provided with baffle plate (101), described baffle plate (101) is arranged at the tail end of iron yoke backboard (7), and described baffle plate (101) is provided with more than one retarding spring (2).
7. according to claim 1 or 2 or 3 or 4 or 5 described throwing platforms based on permanent-magnetism linear motor, it is characterized in that: the position detecting device (8) that described control mechanism (6) and is used for detecting permanent magnet mover (4) movement position links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910226782XA CN101774476B (en) | 2009-12-31 | 2009-12-31 | Permanent magnet linear motor-based throwing platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910226782XA CN101774476B (en) | 2009-12-31 | 2009-12-31 | Permanent magnet linear motor-based throwing platform |
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| CN101774476A CN101774476A (en) | 2010-07-14 |
| CN101774476B true CN101774476B (en) | 2011-09-21 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683797B (en) * | 2012-09-03 | 2016-06-22 | 大银微***股份有限公司 | The linear motor mechanism of magnetic picture forked type |
| CN104065233A (en) * | 2014-06-10 | 2014-09-24 | 黑龙江恒益电气股份有限公司 | Linear motor of electrically-direct-driven press machine |
| CN105668231B (en) * | 2016-03-28 | 2017-09-29 | 冷国强 | Intelligent magnetic moves transporter |
| CN111245194A (en) * | 2018-11-29 | 2020-06-05 | 高明铁企业股份有限公司 | Linear motor assembly with rolling support structure |
| CN111541356B (en) * | 2020-04-29 | 2022-02-18 | 西安交通大学 | Linear electric motor multistage reduction gear |
| CN112187010B (en) * | 2020-10-22 | 2021-07-02 | 华中科技大学 | Permanent magnet linear synchronous motor with same poles |
| CN112452776A (en) * | 2020-11-16 | 2021-03-09 | 史洪扬 | Commodity circulation sorting machine permanent magnetism crawler-type bottom surface drive mechanism and commodity circulation sorting machine |
| CN112671203B (en) * | 2021-01-18 | 2022-09-13 | 哈尔滨工业大学 | High-speed linear electromagnetic propulsion and electromagnetic braking system |
| CN113258745B (en) * | 2021-06-16 | 2021-09-14 | 中国科学院宁波材料技术与工程研究所 | High-speed linear motion device |
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| US4681506A (en) * | 1985-06-21 | 1987-07-21 | Hiroshi Teramachi | Table feed apparatus |
| CN2506371Y (en) * | 2001-11-12 | 2002-08-21 | 北新建材(集团)有限公司 | Material stripping-off device |
| CN2526289Y (en) * | 2001-11-26 | 2002-12-18 | 杨振善 | Automatic stone throwing machine |
| CN101234703A (en) * | 2008-03-03 | 2008-08-06 | 哈尔滨工程大学 | Double rubberbands four sliding rails arrow type ejection mechanism |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4681506A (en) * | 1985-06-21 | 1987-07-21 | Hiroshi Teramachi | Table feed apparatus |
| CN2506371Y (en) * | 2001-11-12 | 2002-08-21 | 北新建材(集团)有限公司 | Material stripping-off device |
| CN2526289Y (en) * | 2001-11-26 | 2002-12-18 | 杨振善 | Automatic stone throwing machine |
| CN101234703A (en) * | 2008-03-03 | 2008-08-06 | 哈尔滨工程大学 | Double rubberbands four sliding rails arrow type ejection mechanism |
Non-Patent Citations (1)
| Title |
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| JP特开平11-155276A 1999.06.08 |
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| CN101774476A (en) | 2010-07-14 |
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