CN104967274A - Linear motor - Google Patents
Linear motor Download PDFInfo
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- CN104967274A CN104967274A CN201510388418.9A CN201510388418A CN104967274A CN 104967274 A CN104967274 A CN 104967274A CN 201510388418 A CN201510388418 A CN 201510388418A CN 104967274 A CN104967274 A CN 104967274A
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- stator
- embedding groove
- linear
- mover
- linear motor
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- 238000004804 winding Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 230000033001 locomotion Effects 0.000 abstract description 8
- 230000001133 acceleration Effects 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 230000036632 reaction speed Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention discloses a linear motor including a stator (2) and a mover (1), a three-phase winding is arranged in the wire embedding groove of the stator (2), the wire embedding groove is arranged in one plane of the stator (2), the three-phase winding is arranged in the same plane with the wire embedding groove, the mover (1) is a flat board parallel to the three-phase winding and a magnetic gap is left between the mover (1) and the surface, having the wire embedding groove, of the stator (2). The linear motor is simple in structure and can directly perform linear motion without converting a transmission mechanism in the middle, so that the system is simplified, the reliability is improved, and the maintenance is easy. The linear speed is not limited because there has no influence of centrifugal force, so that the linear moving speed is high. High precision is guaranteed, for example, the step pitch precision of a linear stepping motor reaches 1 [mu]m. The thrust is large, the reaction speed is high, the acceleration performance is good, the adaptability is high, and the linear motor can be applied to poor environment after a primary iron core is sealed.
Description
Technical field
The invention belongs to the technical field of motor structure.More specifically, the present invention relates to a kind of linear motor.
Background technology
In traditional mechanical electric system, when needing rectilinear motion, be generally obtained by the transmission mechanism such as crank connecting link, rack-and-pinion, screw mandrel with turning motor, but adopting these type of belt drive often to bring, complex structure, quality are heavy, volume is large, the accuracy of mesh is poor, energy loss is large and the shortcoming such as unreliable that works.The highest feed speed that the type of belt drive of traditional " electric rotating machine+ball-screw " can reach is 30m/min, and acceleration is only 3m/s
2.
Electric rotating machine of the prior art as shown in Figure 1, comprises rotor 1, stator 2.In an electric rotating machine, what identical galvanomagnetic effect produced is torque.
Linear motor is one of novel motor of getting up of development in recent years, is a kind of intermediate conversion device and can the motor machine of direct moving linearly of not needing.At present, linear motor obtains and uses more and more widely in communications and transportation, mechanical industry and instrument and meter.Such as, in Digit Control Machine Tool, adopt linear motor to form feed servo-system, not only simplify machine tool structure, but also improve feed accuracy.
But the power conversion mode of linear motor of the prior art is unsatisfactory, and its complex structure, efficiency are not high, because it will adopt special Movement in Magnetic Field mode, be difficult to promote the use.
Summary of the invention
The invention provides a kind of linear motor, its objective is the kinetic energy better electric energy being directly transformed into rectilinear motion.
To achieve these goals, the technical scheme that the present invention takes is:
Linear motor of the present invention, comprises stator, mover, and three-phase windings is arranged in the line embedding groove of stator, and described line embedding groove is arranged in a plane of stator, and described three-phase windings is arranged in the same plane in line embedding groove; Described mover is the flat board being parallel to three-phase windings, and and stator line embedding groove is set surface between have a magnetic gap.
Described mover is provided with many buss parallel to each other, and described bus is parallel to described line embedding groove.
If described three-phase windings is respectively A-X winding, B-Y winding and C-Z winding, its phase place differs 120 ° successively, and described line embedding groove is followed successively by: X-C-Y-A-Z-B, and parallel to each other.
The present invention adopts technique scheme, and structure is simple, does not need intermediate conversion transmission mechanism just directly can produce rectilinear motion, system is simplified, improves reliability, is easy to safeguard; Owing to not having the impact of centrifugal force, its space rate is unrestricted, therefore has high translational velocity; Have higher precision, the stepping accuracy as linear stepping motor can reach l μm; Thrust is large, and reaction speed is fast, and acceleration performance is good; Strong adaptability, can work in adverse circumstances after elementary iron core sealing.
Accompanying drawing explanation
Mark in content shown in accompanying drawing and figure is as follows:
Fig. 1 is the structural representation of electric rotating machine of the prior art;
Fig. 2 is structural representation of the present invention.
Be labeled as in figure:
In Fig. 1: 1, rotor, 2, stator;
In Fig. 2: 1, mover, 2, stator.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
Structure of the present invention is as shown in Figure 2 a kind of linear motor, and comprise stator 2, mover 1, three-phase windings is arranged in the line embedding groove of stator 2.
In order to solve prior art Problems existing and overcome its defect, realize the goal of the invention better electric energy being directly transformed into the kinetic energy of rectilinear motion, the technical scheme that the present invention takes is:
As shown in Figure 2, linear motor of the present invention, described line embedding groove is arranged in a plane of stator 2, and described three-phase windings is arranged in the same plane in line embedding groove; Described mover 1 for being parallel to the flat board of three-phase windings, and and stator 2 line embedding groove is set surface between have a magnetic gap.
Linear motor of the present invention, can regard as and be developed by turning motor.Be similar to an electric rotating machine dissection to spread out to operate.As shown in Figure 1 and Figure 2, three-phase alternating-current induction motor of the prior art (Fig. 1) axially cut open and rotor and stator are evened up, just obtaining three-phase alternating current linear induction motor (Fig. 2).Elementary (stator 2) and secondary (mover 1) of linear motor corresponds respectively to the stators and rotators of turning motor.
Equally, will elementaryly make mover, make stator by secondary, its effect be identical.In fact, winding is manufactured on mover, and purposes is more extensive.
In order to enhance productivity and improve the crudy of part and the high speed developed and High Speed machining have now become an important trends of Machine Tool Development, one be quick on the draw, at a high speed, light drive system, speed will bring up to 40 ~ more than 50m/min.
In linear electric motors, generation be direct driving force.In numerous applications, traditional rotary drive system of comparing, linear electric motors have obvious advantage.Such as, linear electric motors do not need by picture gear, ball-screw, or motor is connected in load by the intermediate transmission mechanical component such as belt transmission.Load is directly connected on linear electric motors.Therefore, just not from gap and the elasticity of moving component.Therefore, servo-controlled power performance is improved, and higher levels of precision is also achieved.
Linear electric motors drive workbench, and its speed is 30 times of traditional transmission mode, and acceleration is 10 times of traditional transmission mode, maximumly reach 10g; Rigidity improves 7 times.
Described mover 1 is provided with many buss parallel to each other, and described bus is parallel to described line embedding groove.
If described three-phase windings is respectively A-X winding, B-Y winding and C-Z winding, its phase place differs 120 ° successively, and described line embedding groove is followed successively by: X-C-Y-A-Z-B, and parallel to each other.
If lead to three-phase symmetrical sinusoidal ac to the armature winding of linear motor, then can produce air-gap field equally, as seen from Figure 2, this air-gap field is Sine distribution along the rectilinear direction launched, and linearly move with the speed of V0 by A, B, C phase sequence of energising, be called travelling-magnetic-field.Secondary regarding as is made up of countless sliver as cage rotor, then under the cutting of travelling-magnetic-field, produce induced current, and this electric current and travelling-magnetic-field interact and namely produce axial thrust.If elementary fixing, then with speed V moving linearly.
Derive the synchronizing speed of straight line alternating current motor is by the synchronous speed of rotary AC motor:
In formula:
V
0＝2
fτ
F---supply frequency;
τ---pole span.
The same with common three-phase alternating-current induction motor, straight line AC asynchronous motor has revolutional slip equally, and has:
Easily know that the excursion of s is between 0 ~ l.
Linear motor of the present invention has following characteristics:
1, structure is simple, does not need intermediate conversion transmission mechanism just directly can produce rectilinear motion, system is simplified, improves reliability, is easy to safeguard;
2, owing to not having the impact of centrifugal force, its space rate is unrestricted, therefore has high translational velocity;
3, have higher positioning precision, the stepping accuracy as linear stepping motor can reach l μm; Linear drive system eliminates the driving error because the mechanical mechanisms such as leading screw cause, and brings tracking error when decreasing interpolation because drive system is delayed.Detect FEEDBACK CONTROL by linear position, greatly can improve positioning precision.Overcome the motion delay phenomenon that the strain of transmission link, fretting wear and backlass cause simultaneously, improve its transmission stiffness;
4, thrust is large, and reaction speed is fast, and acceleration performance is good;
5, strong adaptability, can work in adverse circumstances after elementary iron core sealing;
6, high-speed response: due to eliminate in system some responsive time constants larger as mechanical transmissioning pieces such as leading screws, whole closed-loop control system dynamic response performance is improved greatly, and abnormal reaction is fast sensitive; The workbench of linear motor direct drive is without reverse operation dead band; Because motor inertia is little, so the linear servo system be made up of it can reach higher frequency response;
Linear electric motors of the present invention, owing to not having mechanical driving, make it the drive system becoming low inertia and low noise.Quiet in operation, noise is low: be the mechanical friction owing to eliminating the parts such as turn-screw, and guide rail can adopt again rolling guide or magnetic pad suspension guide (mechanical contact), when it moves, noise will reduce greatly.
In addition, mechanical wear only occurs in guidance system.Therefore, linear electric motors of the present invention have than the better reliability of traditional rotary drive system and lower frictional dissipation, and its efficiency is higher.Due to without intermediate transmission link, eliminate energy loss during mechanical friction.
So the speed of linear electric motors of the present invention is faster, acceleration and deceleration process is short, haul distance is unrestricted: by series connection linear electric motors on guide rail, just can its haul distance of indefinite extension.
The present invention can also be applied in other automatic control technology field and equipment.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (3)
1. a linear motor, comprise stator (2), mover (1), three-phase windings is arranged in the line embedding groove of stator (2), it is characterized in that: described line embedding groove is arranged in a plane of stator (2), described three-phase windings is arranged in the same plane in line embedding groove; Described mover (1) for being parallel to the flat board of three-phase windings, and and stator (2) line embedding groove is set surface between have a magnetic gap.
2. according to linear motor according to claim 1, it is characterized in that: described mover (1) is provided with many buss parallel to each other, and described bus is parallel to described line embedding groove.
3. according to linear motor according to claim 1, it is characterized in that: if described three-phase windings is respectively A-X winding, B-Y winding and C-Z winding, its phase place differs 120 ° successively, and described line embedding groove is followed successively by: X-C-Y-A-Z-B, and parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388418.9A CN104967274A (en) | 2015-06-30 | 2015-06-30 | Linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388418.9A CN104967274A (en) | 2015-06-30 | 2015-06-30 | Linear motor |
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| Publication Number | Publication Date |
|---|---|
| CN104967274A true CN104967274A (en) | 2015-10-07 |
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ID=54221264
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| CN201510388418.9A Pending CN104967274A (en) | 2015-06-30 | 2015-06-30 | Linear motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105250093A (en) * | 2015-11-14 | 2016-01-20 | 霍进铭 | Automatic rehabilitation nursing bed driven by linear motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107771A (en) * | 2005-01-18 | 2008-01-16 | 皇家飞利浦电子股份有限公司 | Coil packs for electric motors |
| CN201667604U (en) * | 2010-03-18 | 2010-12-08 | 沈阳工业大学 | Direct Magnetic Levitation Permanent Magnet Linear Synchronous Motor for CNC Feed Platform |
| CN203617874U (en) * | 2013-11-19 | 2014-05-28 | 江苏大学 | Magnetic flux reverse mixed excitation linear motor with tangential magnetizing |
| CN104638796A (en) * | 2015-01-29 | 2015-05-20 | 南京航空航天大学 | Magnetic circuit compensating primary electro-magnetic linear motor |
-
2015
- 2015-06-30 CN CN201510388418.9A patent/CN104967274A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107771A (en) * | 2005-01-18 | 2008-01-16 | 皇家飞利浦电子股份有限公司 | Coil packs for electric motors |
| CN201667604U (en) * | 2010-03-18 | 2010-12-08 | 沈阳工业大学 | Direct Magnetic Levitation Permanent Magnet Linear Synchronous Motor for CNC Feed Platform |
| CN203617874U (en) * | 2013-11-19 | 2014-05-28 | 江苏大学 | Magnetic flux reverse mixed excitation linear motor with tangential magnetizing |
| CN104638796A (en) * | 2015-01-29 | 2015-05-20 | 南京航空航天大学 | Magnetic circuit compensating primary electro-magnetic linear motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105250093A (en) * | 2015-11-14 | 2016-01-20 | 霍进铭 | Automatic rehabilitation nursing bed driven by linear motor |
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