阅读说明：本技术 低阻力无铁芯单边永磁同步直线电机 (Low-resistance coreless single-side permanent magnet synchronous linear motor ) 是由 罗群 罗亮 赵吉文 于 2019-09-26 设计创作，主要内容包括：本发明永磁直线电机领域,公开了一种低阻力无铁芯单边永磁同步直线电机,包括沿轴向方向间隔铺设永磁体的直线导轨,与直线导轨构成滑移配合的动子座,直线导轨沿轴向方向平行且对称设置有第一轨道、第二轨道,动子座上对应开设有槽壁为空腔的第一导槽、第二导槽,第一轨道、第二轨道至少在一个轴向侧壁上均沿垂直向布置至少一个长钢磁,第一导槽、第二导槽与长钢磁同侧的槽底连接压电陶瓷,且相邻槽壁腔内设置线圈,线圈与压电陶瓷电线连接。保留导轨导向作用,并在动子座负重受压时,利用压电陶瓷的正电压效应,为线圈提供电流,在长钢磁的对称磁场切割下,对动子座产生向上的提升力,抑制推力波动,提高行进系统的鲁棒性。(The invention belongs to the field of permanent magnet linear motors and discloses a low-resistance coreless single-side permanent magnet synchronous linear motor which comprises a linear guide rail and a movable sub-seat, wherein permanent magnets are paved at intervals along the axial direction, the movable sub-seat is in sliding fit with the linear guide rail, the linear guide rail is provided with a first rail and a second rail in parallel and symmetrically along the axial direction, the movable sub-seat is correspondingly provided with a first guide groove and a second guide groove, the groove walls of the first guide groove and the second guide groove are cavities, at least one long steel magnet is vertically arranged on at least one axial side wall of the first rail and the second rail, the groove bottoms of the first guide groove and the second guide groove, which are on the same side as the long steel magnet, are connected with piezoelectric ceramics, and coils are arranged. The guide function of the guide rail is reserved, when the rotor base is loaded and pressed, the positive voltage effect of the piezoelectric ceramics is utilized to provide current for the coil, upward lifting force is generated on the rotor base under the cutting of the symmetrical magnetic field of the long steel magnet, the fluctuation of the thrust is restrained, and the robustness of the advancing system is improved.)

1. A low-resistance iron-core-free unilateral permanent magnet synchronous linear motor comprises a linear guide rail (10) with permanent magnets (11) laid at intervals along the axial direction, a rotor seat (20) in sliding fit with the linear guide rail (10) is formed, and an electric coil (23) is arranged on one side, close to the permanent magnets (11), of the rotor seat (20), and is characterized in that the linear guide rail (10) is provided with a first track (12) and a second track (13) in parallel and symmetrically along the axial direction, the rotor seat (20) is correspondingly provided with a first guide groove (21) and a second guide groove (22) with groove walls being cavities, the permanent magnets (11) are positioned between the first track (12) and the second track (13), at least one long steel magnet (14) is vertically arranged on at least one axial side wall of the first track (12) and the second track (13), the first guide groove (21) and the second guide groove (22) are connected with piezoelectric ceramics (30) at the groove bottoms on the same side of the long steel magnet (, and a coil (40) is arranged in the cavity of the adjacent groove wall, and the coil (40) is connected with the piezoelectric ceramics (30) through an electric wire.

2. The low-resistance coreless single-sided permanent magnet synchronous linear motor according to claim 1, wherein both sides of the rotor base (20) and the linear guide rail (10) are of a symmetrical structure, the long steel magnets (14) are arranged on two axial side walls of the first rail (12), a piezoelectric ceramic (30) is arranged at the groove bottom of the first guide groove (21) adjacent to the long steel magnets (14), and a coil (40) is accommodated in the cavity of the adjacent groove wall.

3. The low-resistance coreless single-sided permanent magnet synchronous linear motor according to claim 2, wherein the long steel magnets (14) extend to the edge of the side wall of the first rail (12), and a gap is left between the bottom of the groove cavity of the first guide groove (21) and the top end of the first rail (12).

4. A low-resistance coreless single-sided permanent magnet synchronous linear motor as claimed in claim 3, wherein the bottom end of the slot wall of the first guide slot (21) is provided with an opening, the piezoelectric ceramic (30) is a convex platform, the piezoelectric ceramic (30) is inserted and fixed at the bottom end of the slot wall of the first guide slot (21), and the bottom end of the piezoelectric ceramic (30) abuts against the linear guide rail (10).

5. A low-resistance coreless single-sided permanent magnet synchronous linear motor according to claim 4, wherein the piezoelectric ceramic (30) is inserted into a groove wall of the first guide groove (21), and the bottom surface covers a groove wall at the bottom end of the first guide groove (21).

6. The low-resistance coreless single-sided permanent magnet synchronous linear motor according to claim 5, wherein the axial ends of the bottom end of the slot wall of the first guide slot (21) are provided with positioning holes (211), and the piezoelectric ceramic (30) is correspondingly provided with positioning pins (31).

Technical Field

The invention relates to the field of permanent magnet linear motors, in particular to a low-resistance coreless single-side permanent magnet synchronous linear motor.

Background

The linear motor is structurally broken through, so that the linear motor can be directly driven in a linear mode, other intermediate links are not needed, the linear motor has the characteristic of zero rotation of a feeding system, when the linear motor moves linearly under the action of an electromagnetic field, a guide rail is needed for standardizing and limiting a traveling route, sliding friction resistance is inevitably generated, the linear motor is in direct proportion to positive pressure of a rotor acting on the guide rail, the rotor of the linear motor serves as a load-carrying unit, thrust fluctuation is far higher than experimental ideal data along with increase of actual load, and meanwhile, the robustness of the system is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the iron-core-free unilateral permanent magnet synchronous linear motor which can reduce the sliding friction resistance and stabilize the thrust fluctuation under the condition of load bearing.

The invention solves the technical problems through the following technical means: the utility model provides a low resistance unilateral permanent magnetism synchronous linear electric motor of no iron core, include the linear guide who lays the permanent magnet along the axial direction interval, constitute the complex of sliding with linear guide and move the sub-seat, it arranges the circular telegram coil to be close to one side of permanent magnet on the sub-seat to move, linear guide is provided with first track along the parallel and symmetry of axial direction, the second track, move and to set up the first guide slot that the cell wall is the cavity on the sub-seat correspondingly, the second guide slot, the permanent magnet is located first track, between the second track, first track, the second track all is followed the vertical direction and is arranged at least one long steel magnetism on an axial lateral wall, first guide slot, piezoceramics is connected with the cell bottom of long steel magnetism homonymy, and set up the coil in the adjacent cell wall intracavity, coil and piezoceramics connection.

The invention has the advantages that: the guide function of the guide rail is reserved, when the rotor base is pressed under load, the positive voltage effect of the piezoelectric ceramics is utilized to provide current for the coil, upward lifting force is generated on the rotor base under the cutting of the symmetrical magnetic field of the long steel magnet, the positive pressure on the guide rail is reduced, the sliding friction resistance is reduced, the thrust fluctuation is inhibited, and the robustness of a traveling system is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

FIG. 3 is a schematic structural diagram of a connection relationship between a piezoelectric ceramic and a mover seat according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a low-resistance coreless single-sided permanent magnet synchronous linear motor includes a linear guide rail 10 on which permanent magnets 11 are alternately laid along an axial direction, and a mover base 20 forming a sliding fit with the linear guide rail 10, wherein an energizing coil 23 is arranged on one side of the mover base 20 close to the permanent magnets 11, and the coreless structure can reduce the side end effect and the cogging effect of the system and suppress thrust fluctuation.

The linear guide rail 10 is provided with a first rail 12 and a second rail 13 in parallel and symmetrically along the axial direction, a first guide groove 21 and a second guide groove 22 with a cavity wall are correspondingly formed in the rotor base 20, the permanent magnet 11 is located between the first rail 12 and the second rail 13, at least one long steel magnet 14 is vertically arranged on at least one axial side wall of the first rail 12 and the second rail 13, the first rail 12 and the second rail 13 are symmetrically arranged, the magnetic fields of the long steel magnets 14 are also symmetrically arranged, the groove bottoms of the first guide groove 21 and the second guide groove 22 on the same side as the long steel magnet 14 are connected with the piezoelectric ceramics 30, a coil 40 is arranged in the cavity of the adjacent groove wall, and the coil 40 is in electric connection with the piezoelectric ceramics 30.

In the moving sub-base 20 under load, the whole weight G1 is not only positive pressure applied on the linear guide rail 10, G1 is a stable value, so that the piezoelectric ceramic 30 is also stably pressed, voltage is generated under the condition that the piezoelectric ceramic 30 is deformed under stress, continuous current is provided after the piezoelectric ceramic is electrically connected with the coil 40, an air gap surface 15 is formed, and the coil 40 generates upward supporting force G2 under the cutting of the magnetic field of the long steel magnet 14, wherein the weight of the piezoelectric ceramic 30 and the coil 40 is G3; if G1-G2< G1-G3, the positive pressure on the linear guide rail 10 is effectively reduced, and the sliding friction resistance is reduced. The following biomimetic simulation experimental procedure is provided for this purpose.

The main parameters are as follows: load weight G1: the mass of the motor rotor (coil frame, metal aluminum plate) + the mass of the laser head is about 6 kg;

piezoelectric ceramic 30, coil 40 weight and G3: about 1 kg;

friction coefficient of guide rail: 0.003;

the acceleration requirement is as follows: 2g of the total weight of the mixture;

the speed requirement is as follows: 2 m/s;

acceleration time: 0.1 s;

the length of the permanent magnet is as follows: 100 mm;

the width of the permanent magnet: 38 mm;

the thickness of the permanent magnet is as follows: 20 mm;

polar distance: 46 mm;

air gap: 2 mm;

thickness of the energized coil 23: 15mm, coil 40 thickness: 1.5 mm;

electrified coil 23 coil single-side width: 18mm, coil 40 coil single side width: 1.8 mm;

single energized coil 23 total coil width: 46mm, and the total width of the coil 40 is 4.6 mm;

number of turns of energizing coil 23: 1000, coil 40 turns: 100, respectively;

permanent magnet 11: neodymium magnet NdFeB, radially magnetizing, and having a residual magnetism content of 1.23T;

energizing coil 23: pure copper enameled wire, wire diameter 0.5mm, coil 40: pure copper enameled wires with the wire diameter of 0.05 mm;

bionic results are as follows: G1-G2 ═ 4 kg; G1-G3 ═ 5 kg; and the thrust fluctuation of the linear motor is less than or equal to 2 percent.

The long steel magnets 14 are arranged on at least one axial side wall of the first track 12 and the second track 13, the magnetic field strength is limited, in the embodiment, both sides of the rotor base 20 and the linear guide rail 10 are of symmetrical structures, the long steel magnets 14 are arranged on two axial side walls of the first track 12, the piezoelectric ceramics 30 are arranged at the groove bottom of the first guide groove 21 adjacent to the long steel magnets 14, and the coil 40 is accommodated in the cavity of the adjacent groove wall. This further reduces the positive pressure on the linear guide 10, thereby reducing the sliding frictional resistance.

The long steel magnet 14 extends to the edge of the side wall of the first rail 12, the magnetic force range is expanded, a gap is reserved between the bottom of the groove cavity of the first guide groove 21 and the top end of the first rail 12, and the contact area between the first guide groove 21 and the second guide groove 22 and between the first rail 12 and the second rail 13 is reduced.

As a concrete connection mode of the first guide groove 21 and the piezoelectric ceramic 30, an opening is arranged at the bottom end of the groove wall of the first guide groove 21, the piezoelectric ceramic 30 is a convex table, the piezoelectric ceramic 30 is inserted and fixed at the bottom end of the groove wall of the first guide groove 21, and the bottom end of the piezoelectric ceramic 30 abuts against the linear guide rail 10. The piezoelectric ceramic 30 is directly inserted into the bottom end of the groove wall of the first guide groove 21, which not only meets the connection strength between the piezoelectric ceramic 30 and the first guide groove 21 of the rotor base 20 under load pressure, but also has the characteristics of simple installation and convenient disassembly.

As a further improvement of the above, the piezoelectric ceramics 30 is inserted into the groove wall of the first guide groove 21, and the bottom surface covers the groove wall at the bottom end of the first guide groove 21. The bottom surface of the piezoelectric ceramic 30 covers the bottom groove wall of the first guide groove 21, so that pressure can be completely absorbed, and the conversion rate of the positive piezoelectric effect is improved.

For further strengthening the stability of the device, locating holes 211 are formed in the two axial ends of the bottom end of the groove wall of the first guide groove 21, the piezoelectric ceramics 30 are correspondingly provided with locating pins 31, the locating pins 31 are matched and connected with the locating holes 211, the connecting strength of the device is enhanced, and the combination characteristic of easiness in disassembly is also kept.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.