CN212210816U

CN212210816U - Linear motor

Info

Publication number: CN212210816U
Application number: CN202021122833.2U
Authority: CN
Inventors: 刘情; 王跃勇
Original assignee: Golden Horse Technology Entertainment Corp ltd
Current assignee: Guangdong Jinma amusement Co.,Ltd.
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-12-22
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses a linear electric motor, including installation mechanism, installation mechanism fixed connection a plurality of permanent magnet monomer, at least one permanent magnet monomer constitutes a permanent magnet group, and four at least permanent magnet group component permanent magnet are listed as, and the permanent magnet is listed as and has two and parallel distribution, is equipped with three coil assembly between two permanent magnet lists, and all permanent magnet groups that are listed as at one of them permanent magnet are listed as follows with the magnetic pole arrangement rule of one side: the polarity of the magnetic pole of the first permanent magnet group is N pole, the polarity of the magnetic pole of the second permanent magnet group is S pole, from the third permanent magnet group, the polarity of the magnetic pole of the odd permanent magnet group is the same as that of the magnetic pole of the previous permanent magnet group, and the polarity of the magnetic pole of the even permanent magnet group is opposite to that of the magnetic pole of the previous permanent magnet group. When exporting the same drive power the utility model discloses use permanent magnet monomer that quantity still less reduces linear electric motor's volume, reduction in production cost improves the free utilization efficiency of permanent magnet, and the practicality is strong.

Description

Linear motor

[ technical field ]

The utility model relates to a linear electric motor.

[ background art ]

The linear motor is widely applied to equipment such as rail transit, machine tools, amusement facilities and the like, a permanent magnet arrangement structure of the existing linear motor generally comprises two permanent magnet rows which are distributed in parallel and formed by arranging a plurality of permanent magnet monomers (magnets) with the same specification in parallel, the polarities of the permanent magnet monomer magnetic poles opposite between the two permanent magnet rows are opposite, and the polarities of all the permanent magnet monomer magnetic poles on one side of one permanent magnet row are N poles and S poles which are alternately arranged. The existing linear motor needs to use a large number of permanent magnets in order to obtain enough driving force, the utilization efficiency of the permanent magnets is low, the size of the linear motor is large, and the production cost is high. Under the condition that the output power is not changed, the driving force fluctuation range of the existing linear motor is large and generally reaches up to 15 percent, and the normal and stable operation of equipment is not facilitated.

The utility model discloses it is based on above problem produces.

[ contents of utility model ]

The utility model discloses a to prior art not enough, provide a novel linear electric motor, under the same condition of output drive power, the utility model discloses compare with current linear electric motor, the utility model discloses use the less permanent magnet monomer of quantity, the utility model discloses holistic small, low in production cost.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a linear motor comprises an installation mechanism, wherein a plurality of permanent magnet monomers with the same specification are fixedly connected to the installation mechanism, at least one permanent magnet monomer is arranged in parallel to form a permanent magnet group, the magnetic poles with the same polarity of all the permanent magnet monomers in the permanent magnet group are arranged on the same side to form the N pole and the S pole of the permanent magnet group respectively, at least four permanent magnet groups are arranged in parallel along a straight line to form a permanent magnet row, the two permanent magnet rows are distributed in parallel, the number of the permanent magnet groups in each permanent magnet row is an even number, a gap is formed between the two permanent magnet rows, the two permanent magnet rows are oppositely arranged at the left and the right, three coil groups capable of moving relative to the two permanent magnet rows are arranged between the two permanent magnet rows, the polarities of the opposite magnetic poles between the two permanent magnet rows are opposite, the magnetic pole arrangement rule of the same side of all the permanent magnet groups of one permanent magnet column is as follows:

the polarity of the magnetic pole of the first permanent magnet group is N pole, the polarity of the magnetic pole of the second permanent magnet group is S pole, from the third permanent magnet group, the polarity of the magnetic pole of the odd permanent magnet group is the same as that of the magnetic pole of the previous permanent magnet group, and the polarity of the magnetic pole of the even permanent magnet group is opposite to that of the magnetic pole of the previous permanent magnet group.

In the above linear motor, the pole distances L of two adjacent permanent magnet groups in the permanent magnet array are the same, the coil group includes at least one sub-coil with the same specification, the number i of the sub-coils in each coil group is the same, the center distances P of two adjacent coil groups are the same, and the pole distances L, the number i and the center distances P satisfy the following three conditions:

in the above linear motor, when the coil assembly includes at least two sub-coils, the center distances Q between two adjacent sub-coils in the coil assembly are the same.

In the linear motor, the pole pitch L and the center pitch Q both satisfy: q is 2L.

In the linear motor, the mounting mechanism and two permanent magnet columns form a rotor of the linear motor, and three coil groups form a stator of the linear motor.

According to the linear motor, the mounting mechanism comprises a bottom plate and two side plates perpendicular to the bottom plate, the two side plates are parallel and opposite, and the two permanent magnet rows are located between the two side plates and are respectively and fixedly connected to the two side plates.

According to the linear motor, the mounting mechanism is of an integrally formed integral structure, and the mounting mechanism is made of a magnetic conductive material.

In the linear motor, the mounting mechanism is connected with a sliding mechanism for sliding.

According to the linear motor, the sliding mechanism comprises a track fixed on the bearing surface, a sliding block capable of sliding along the track is connected to the track, and the mounting mechanism is fixedly connected to the sliding block.

According to the linear motor, the two rails are arranged in parallel, and the mounting mechanism can slide along the rails.

The utility model has the advantages that:

1. the utility model discloses compare with current linear electric motor, when exporting the same drive power the utility model discloses use permanent magnet monomer that quantity still less to great reduction linear electric motor's volume, great reduction in production cost, fine improvement permanent magnet monomer's utilization efficiency, the practicality is strong.

2. The utility model discloses compare with current linear electric motor, under the unchangeable condition of output, the utility model discloses the drive power fluctuation range of output is narrower, can keep about 0.9%, and drive power output is more stable, can realize especially under heavy load or fast-speed state to output speed's accurate control, the utility model discloses a linear electric motor moves more steadily reliably, and output speed control accuracy is higher, simple structure, and the practicality is strong.

[ description of the drawings ]

Fig. 1 is a schematic structural view of one of the permanent magnet row arrangement structures of the present invention;

fig. 2 is a schematic structural view of a second arrangement structure of the permanent magnet array of the present invention;

fig. 3 is a schematic structural diagram of one of the coil block structures of the present invention;

fig. 4 is a schematic structural diagram of a second coil assembly structure according to the present invention;

fig. 5 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 6 is a sectional view in the direction of the arrows A-A in FIG. 5;

fig. 7 is a schematic structural diagram of a second embodiment of the present invention;

fig. 8 is a schematic structural view of one of permanent magnet row arrangement structures of a conventional linear motor;

fig. 9 is a schematic structural view of a second permanent magnet row arrangement structure of a conventional linear motor;

fig. 10 is a schematic structural view of a third arrangement structure of permanent magnet arrays according to the present invention;

FIG. 11 is a graph showing the variation trend of the magnetic induction of the magnetic field in FIGS. 8, 9 and 10;

fig. 12 is a driving force fluctuation graph of fig. 5.

[ detailed description of the invention ]

The following description is further detailed with reference to the accompanying drawings and embodiments of the present invention:

as shown in fig. 1 to 7, a linear motor includes an installation mechanism 3, a plurality of permanent magnet units 100 with the same specification are fixedly connected to the installation mechanism 3, at least one of the permanent magnet units 100 is arranged in parallel to form a permanent magnet group 10, magnetic poles of the same polarity of all the permanent magnet units 100 in the permanent magnet group 10 are arranged on the same side to form N pole and S pole of the permanent magnet group 10, at least four of the permanent magnet groups 10 are arranged in parallel to form a permanent magnet row 1 along a straight line, the permanent magnet row 1 has two and parallel distributed magnetic poles, magnetic poles at two ends of all the permanent magnet groups 10 in the permanent magnet row 1 are arranged in parallel, the number of the permanent magnet groups 10 in each permanent magnet row 1 is an even number, two permanent magnet rows 1 have a gap and are arranged oppositely from left to right, three coil groups 5 capable of moving relative to the permanent magnet rows 1 are arranged between the, the opposite magnetic poles between the two permanent magnet rows 1 have opposite polarities, and the arrangement rule of the magnetic poles on the same side of all the permanent magnet groups 10 of one of the permanent magnet rows 1 is as follows:

the polarity of the magnetic pole of the first permanent magnet group 10 is N, the polarity of the magnetic pole of the second permanent magnet group 10 is S, and from the third permanent magnet group 10, the polarity of the magnetic pole of the odd-numbered permanent magnet group 10 is the same as the polarity of the magnetic pole of the previous permanent magnet group 10, and the polarity of the magnetic pole of the even-numbered permanent magnet group 10 is opposite to the polarity of the magnetic pole of the previous permanent magnet group 10.

The permanent magnet unit 100 is a single magnet, fig. 8 is one of permanent magnet arrangement structures of existing linear motors, in the arrangement structure, two rows of permanent magnets are opposite, only three permanent magnets are arranged in each row of permanent magnets, the left magnetic poles of the right row of permanent magnets are arranged in sequence of "N pole-S pole-N pole", and the variation trend of the magnetic induction intensity of the magnetic field in the arrangement direction of the permanent magnets at the middle position between the two rows of permanent magnets is shown as a curve a in fig. 11. The X-axis of the coordinate system in fig. 11 represents the middle position between two rows of permanent magnets, and the Y-axis represents the magnitude of magnetic induction of the magnetic field. Fig. 9 is a second permanent magnet arrangement structure of the conventional linear motor, in which two rows of permanent magnets are opposite to each other, there are only six permanent magnets in each row of permanent magnets, the left magnetic poles of the right row of permanent magnets are arranged in the order of "N pole-S pole-N pole-S pole", and the variation trend of the magnetic induction intensity of the magnetic field in the arrangement direction of the permanent magnets at the middle position between the two rows of permanent magnets is shown by a curve b in fig. 11. Fig. 10 is the third permanent magnet arrangement structure of the linear electric motor of the present invention, in this structure, every permanent magnet group 10 includes a permanent magnet monomer 100, every permanent magnet row 1 includes six permanent magnet groups 10, the left magnetic pole arrangement condition of all permanent magnet groups 10 of a permanent magnet row 1 on the right satisfies the above-mentioned magnetic pole arrangement rule, and the magnetic field magnetic induction intensity variation trend of the middle position between two permanent magnet rows 1 along the arrangement direction of the permanent magnet monomer 100 is shown as curve c in fig. 11.

Through the comparison of three curves in fig. 11, the permanent magnet arrangement structure of the linear motor of the present invention is compared with the permanent magnet arrangement structure of the existing linear motor, and under the condition of using the same number of permanent magnet units 100, the magnetic field magnetic induction intensity at the middle position between two permanent magnet rows 1 of the present invention is larger, and the variation trend of the magnetic field magnetic induction intensity along the arrangement direction of the permanent magnet units 100 at the middle position between two permanent magnet rows 1 tends to approach to the sine curve, the linear motor of the present invention can output larger driving force during the operation; when obtaining the same drive power, the utility model discloses a linear electric motor uses permanent magnet monomer 100 that quantity still less, can reduce linear electric motor's volume greatly, great reduction in production cost, fine improvement permanent magnet monomer 100's utilization efficiency, the practicality is strong.

The permanent magnetThe polar distances L of two adjacent permanent magnet groups 10 in the body row 1 are the same, the coil group 5 comprises at least one sub-coil 50 with the same specification, the number i of the sub-coils 50 in each coil group 5 is the same, the center distances P of two adjacent coil groups 5 are the same, and the polar distances L, the number i and the center distances P meet the following requirements:

the pole distance L is a distance between center positions of two adjacent permanent magnet groups 10 in the permanent magnet array 1, and the center position of the permanent magnet group 10 is a geometric center of the permanent magnet group 10. As shown in fig. 1, the permanent magnet group 10 includes one permanent magnet unit 100, the permanent magnet array 1 includes eighteen permanent magnet groups 10, and the pole distance L is a distance between center positions of two adjacent permanent magnet units 100. As shown in fig. 2, the permanent magnet group 10 includes three permanent magnet units 100, the permanent magnet column 1 includes six permanent magnet groups 10, the center position of the permanent magnet group 10 is the center of the middle permanent magnet unit 100, and the pole distance L is the distance between the center positions of two adjacent permanent magnet groups 10.

The center-to-center distance P is a distance between center positions of two adjacent coil sets 5, and the center position of the coil set 5 is a geometric center of the coil set 5. As shown in fig. 3, each coil assembly 5 includes one sub-coil 50, and the center-to-center distance P is a distance between center positions of two adjacent sub-coils 50. As shown in fig. 4, each coil set 5 includes two sub-coils 50, the center position of the coil set 5 is a midpoint between the center positions of the two sub-coils 50 in the coil set 5, and the center-to-center distance P is a distance between the midpoint positions of the two adjacent coil sets 5.

Fig. 12 is in fig. 5 the utility model discloses a linear electric motor's drive power fluctuation curve graph, when output is unchangeable, the utility model discloses a linear electric motor's drive power fluctuation range is narrower, can keep about 0.9%, and drive power output is more stable, realizes the accurate control to output speed, especially under heavy load or fast-speed state, the utility model discloses a linear electric motor moves more steadily reliably, output speed control accuracy is higher, and the structure is simpler, and the practicality is stronger.

When the coil assembly 5 includes at least two sub-coils 50, the center distances Q between two adjacent sub-coils 50 in the coil assembly 5 are the same.

The center-to-center distance Q is the distance between the centers of two adjacent sub-coils 50 within the coil assembly 5. As shown in fig. 4 and 7, each coil assembly 5 includes two sub-coils 50, and the center-to-center distance Q is a distance between center positions of two adjacent sub-coils 50 in the coil assembly 5.

The polar distance L and the center distance Q both satisfy: q is 2L.

As shown in fig. 5 to 7, the mounting mechanism 3 and two permanent magnet arrays 1 constitute a mover of the linear motor, and three coil groups 5 constitute a stator of the linear motor. Or the mounting mechanism 3 and the two permanent magnet rows 1 form a stator of the linear motor, and the three coil groups 5 form a rotor of the linear motor.

The mounting mechanism 3 comprises a bottom plate 31 and two side plates 32 perpendicular to the bottom plate 31, the two side plates 32 are parallel and opposite, and the two permanent magnet arrays 1 are located between the two side plates 32 and are respectively and fixedly connected to the two side plates 32.

The mounting mechanism 3 is an integrally formed integral structure, and the mounting mechanism 3 is made of a magnetic conductive material. The permanent magnet monomer 100 is adsorbed on the installation mechanism 3, the magnetism of the permanent magnet monomer 100 can be greatly enhanced by the installation mechanism 3, the structure is simpler, and the practicability is stronger.

The mounting mechanism 3 is connected with a sliding mechanism 4 for sliding. When the three coil groups 5 form a rotor of the linear motor, the sliding mechanism 4 is movably connected with the coil groups 5 to realize sliding of the coil groups 5.

The sliding mechanism 4 comprises a track 41 fixed on the bearing surface, a sliding block 42 capable of sliding along the track 41 is connected to the track 41, and the mounting mechanism 3 is fixedly connected to the sliding block 42.

The rails 41 are arranged in parallel, and the mounting mechanism 3 can slide along the rails 41.

The polarity of the three coil sets 5 is determined by the current direction of the coil sets 5, and the current direction and the current magnitude of the three coil sets 5 can be controlled by using a linear motor driver, and the current waveform of each sub-coil 50 is a sine wave. In the embodiment shown in fig. 5, each coil set 5 includes one sub-coil 50, and the three sub-coils 50 are a U-phase sub-coil, a V-phase sub-coil, and a W-phase sub-coil, respectively, and in order to obtain the maximum output driving force, the current phases of the adjacent sub-coils 50 are shifted by 120 degrees, for example, the current phase difference between the U-phase sub-coil and the V-phase sub-coil is 120 degrees, and the current phase difference between the V-phase sub-coil and the W-phase sub-coil is 120 degrees.

In the embodiment shown in fig. 7, the three coil groups 5 are a U-phase coil group, a V-phase coil group, and a W-phase coil group, each coil group 5 includes four sub-coils 50, that is, the U-phase coil group includes U1 sub-coil, U2 sub-coil, U3 sub-coil, and U4 sub-coil, the V-phase coil group includes V1 sub-coil, V2 sub-coil, V3 sub-coil, and V4 sub-coil, and the W-phase coil group includes W1 sub-coil, W2 sub-coil, W3 sub-coil, and W4 sub-coil. In order to obtain the maximum output driving force, the current phases of the adjacent sub-coils 50 in each coil group 5 are respectively shifted by 180 degrees, for example, in the U-phase coil group, the current phases of the U1 sub-coil and the U3 sub-coil are the same, the current phases of the U2 sub-coil and the U4 sub-coil are the same, and the current phase difference between the U1 sub-coil and the U2 sub-coil is 180 degrees; the current phases of the sub-coils 50 with the same number of the adjacent coil groups 5 are shifted by 120 degrees, that is, the current phase difference between the U1 sub-coil and the V1 sub-coil is 120 degrees, the current phase difference between the U2 sub-coil and the V2 sub-coil is 120 degrees, the current phase difference between the U3 sub-coil and the V3 sub-coil is 120 degrees, the current phase difference between the U4 sub-coil and the V4 sub-coil is 120 degrees, the current phase difference between the V1 sub-coil and the W1 sub-coil is 120 degrees, the current phase difference between the V2 sub-coil and the W2 sub-coil is 120 degrees, the current phase difference between the V3 sub-coil and the W3 sub-coil is 120 degrees, and the current phase difference between the V4 sub-coil and the W4 sub-.

Claims

1. A linear electric motor characterized by: including installation mechanism (3), fixedly connected with a plurality of permanent magnet monomer (100) that the specification is the same on installation mechanism (3), at least one permanent magnet monomer (100) arranges side by side and constitutes a permanent magnet group (10), the magnetic pole homonymy of all permanent magnet monomer (100) homopolarity in permanent magnet group (10) arranges and forms the N utmost point and the S utmost point of permanent magnet group (10) respectively, at least four permanent magnet group (10) arranges side by side along the straight line and constitutes permanent magnet row (1), permanent magnet row (1) has two and parallel distribution, every the number of permanent magnet group (10) in permanent magnet row (1) is the even number, two have the clearance between permanent magnet row (1) and control relative setting, two be equipped with three coil group (5) that can remove relative to it between permanent magnet row (1), two the polarity of relative magnetic pole is opposite between permanent magnet row (1), the arrangement rule of the magnetic poles on the same side of all the permanent magnet groups (10) of one permanent magnet column (1) is as follows:

the polarity of the magnetic pole of the first permanent magnet group (10) is N pole, the polarity of the magnetic pole of the second permanent magnet group (10) is S pole, from the third permanent magnet group (10), the polarity of the magnetic pole of the odd permanent magnet group (10) is the same as that of the magnetic pole of the previous permanent magnet group (10), and the polarity of the magnetic pole of the even permanent magnet group (10) is opposite to that of the magnetic pole of the previous permanent magnet group (10).

2. A linear motor according to claim 1, wherein: the polar distances L of two adjacent permanent magnet groups (10) in the permanent magnet array (1) are the same, the coil groups (5) comprise at least one sub-coil (50) with the same specification, the number i of the sub-coils (50) in each coil group (5) is the same, the central distances P of the two adjacent coil groups (5) are the same, and the polar distances L, the number i and the central distances P meet the following requirements:

3. a linear motor according to claim 2, wherein: when the coil group (5) comprises at least two sub-coils (50), the center distances Q of the adjacent two sub-coils (50) in the coil group (5) are the same.

4. A linear motor according to claim 3, wherein: the polar distance L and the center distance Q both satisfy: q is 2L.

5. A linear motor according to any one of claims 1-2, characterized in that: the mounting mechanism (3) and the two permanent magnet rows (1) form a rotor of the linear motor, and the three coil groups (5) form a stator of the linear motor.

6. A linear motor according to claim 5, wherein: the mounting mechanism (3) comprises a bottom plate (31) and two side plates (32) perpendicular to the bottom plate (31), the two side plates (32) are parallel and opposite, and the two permanent magnet rows (1) are located between the two side plates (32) and are respectively and fixedly connected to the two side plates (32).

7. A linear motor according to claim 6, wherein: the mounting mechanism (3) is an integrated structure, and the mounting mechanism (3) is made of a magnetic conductive material.

8. A linear motor according to claim 5, wherein: the mounting mechanism (3) is connected with a sliding mechanism (4) for the mounting mechanism to slide.

9. A linear motor according to claim 8, wherein: slide mechanism (4) are including fixing track (41) on the loading face, be connected with slider (42) that can slide along it on track (41), installation mechanism (3) fixed connection is on slider (42).

10. A linear motor according to claim 9, wherein: the rails (41) are arranged in parallel, and the mounting mechanism (3) can slide along the rails (41).