CN217282646U

CN217282646U - Linear motor's primary structure and linear motor

Info

Publication number: CN217282646U
Application number: CN202220822593.XU
Authority: CN
Inventors: 汪奇; 沈海涛; 吉晓凯; 张凯; 周原
Original assignee: Suzhou Vega Technology Co Ltd
Current assignee: Suzhou Vega Technology Co Ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-23
Anticipated expiration: 2032-04-11

Abstract

The utility model relates to the technical field of electric machines, especially, relate to a linear electric motor's primary structure and linear electric motor. The primary structure of the linear motor comprises at least one winding module, each winding module comprises a winding unit, each winding unit comprises n coils which are sequentially arranged and sleeved, the coils are of a hollow closed-loop structure, the hollow area of any coil in the same winding unit is used for accommodating one side of the rest n-1 coils, n is not less than 2, and n is a positive integer. The n coils of the winding unit in the primary structure are sequentially arranged and sleeved, so that the full slot rate of the coil winding can be increased, the thrust density of the linear motor is improved, and the size of the coil is reduced. The linear motor has the advantages that by applying the primary structure of the linear motor, the thrust density of the linear motor is high, and the size is small.

Description

Linear motor's primary structure and linear motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a linear electric motor's primary structure and linear electric motor.

Background

The coreless linear motor comprises a primary structure and a secondary structure, the secondary structure comprises a yoke plate and permanent magnets, the magnetizing direction of the permanent magnets is perpendicular to the moving direction of the primary structure, and the permanent magnets are alternately arranged and fixed on the inner side of the secondary yoke plate in sequence along the moving direction N, S of the primary structure; the primary structure is a coil winding module and is positioned between two rows of permanent magnets of the secondary structure, and the permanent magnets generate magnetic lines of force and the electrified primary coil generates electromagnetic force to push the primary structure to do linear motion.

The coil winding in the existing primary structure is not compact in arrangement and low in full slot rate, so that the thrust density of the linear motor is reduced, and the size of the coil is increased.

Therefore, a primary structure of a linear motor is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a linear electric motor's primary structure increases the full groove rate of coil winding, promotes linear electric motor thrust density, reduces the coil size.

Another object of the present invention is to provide a linear electric motor, which has a primary structure using the above linear electric motor, and has a large thrust density and a small size.

In order to realize the purpose, the following technical scheme is provided:

in a first aspect, a primary structure of a linear motor is provided, which includes at least one winding module, each winding module includes a winding unit, each winding unit includes n coils sequentially arranged and sleeved, the coils are in a hollow closed-loop structure, a hollow area of any coil in the same winding unit is used for accommodating one side of the rest n-1 coils, wherein n is greater than or equal to 2, and n is a positive integer.

As an alternative to the primary structure of the linear motor, the coil is a hollow rectangular closed-loop structure, the coil includes long sides and short sides, and the hollow area of any number of coils in the same winding unit is used for accommodating the long sides of the rest n-1 coils.

As an alternative to the primary structure of the linear motor, the width of the coil in the same winding unit is w, and the width of the hollow area is d ═ n-1) w.

As an alternative to the primary structure of the linear electric machine, all coils in the same winding module are of identical size.

As an alternative to the primary structure of the linear motor, the long sides of all coils in the same winding unit are located in the same plane.

As an alternative to the primary structure of the linear motor, both short sides of all coils in the same winding unit are bent to the same side of the long side.

As an alternative to the primary structure of the linear motor, the bending angle of the short side is 45 ° to 90 °.

As an alternative to the primary structure of the linear motor, the bending angles of the two short sides of the same coil in the same winding unit are the same.

As an alternative of the primary structure of the linear motor, the number of the winding units in the same winding module is two, and the two winding units are arranged in a back-to-back fit manner.

As an alternative of the primary structure of the linear motor, a plurality of winding modules are sequentially arranged adjacently, and the primary structure is formed by the winding modules through pouring sealant and encapsulation.

As an alternative to the primary structure of the linear electric machine, the connecting lines of the center points of the plurality of winding modules are straight lines.

In a second aspect, there is provided a linear electric motor comprising a primary structure of a linear electric motor as described above.

As an alternative of the linear motor, the linear motor further comprises a mounting plate and a secondary structure, the secondary structure comprises a U-shaped yoke plate and permanent magnets, the permanent magnets are arranged on the inner sides of two U-shaped arms of the U-shaped yoke plate, the primary structure is arranged between the two rows of the permanent magnets, and the mounting plate is fixedly connected to the primary structure and located at the opening end of the U-shaped yoke plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a linear electric motor's primary structure, including at least one winding module, every winding module includes the winding unit, and every winding unit is including arranging a plurality of coils of n that the cover was established in proper order, and the coil is hollow closed loop structure, and the cavity region of arbitrary coil is used for holding one side of all the other n-1 coils in the same winding unit, and wherein, n is more than or equal to 2, and n is the positive integer. The n coils of the winding unit in the primary structure are sequentially arranged and sleeved, so that the full slot rate of the coil winding can be increased, the thrust density of the linear motor is improved, and the size of the coil is reduced.

The utility model provides a linear electric motor, through the primary structure who uses above-mentioned linear electric motor, linear electric motor thrust density is big, and the size is little.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of removing a potting adhesive from a primary structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a coil according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a winding unit according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coil according to a first embodiment of the present invention before a short edge of the coil is bent;

fig. 5 is a side view of a coil according to an embodiment of the present invention;

fig. 6 is a side view of a winding module according to an embodiment of the present invention in one direction;

fig. 7 is a side view of another direction of a winding module according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a linear motor according to a second embodiment of the present invention;

fig. 9 is a side view of a linear motor according to a second embodiment of the present invention;

fig. 10 is a schematic structural view of the linear motor according to the second embodiment of the present invention, illustrating the removal of the mounting plate and the potting adhesive;

fig. 11 is a side view of the linear motor according to the second embodiment of the present invention for removing the mounting plate and the potting adhesive.

Reference numerals:

100-primary structure; 200-a secondary structure; a 201-U shaped yoke plate; 202-a permanent magnet; 300-mounting plate;

10-a winding module;

1-a winding unit; 11-a coil; 111-short side; 112-long side; 113-hollow area.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1 to 4, the present embodiment provides a primary structure 100, which includes at least one winding module 10, each winding module 10 includes at least one winding unit 1, each winding unit 1 includes n coils 11 sequentially arranged and sleeved, the coils 11 are in a hollow closed-loop structure, a hollow area 113 of any number of coils 11 in the same winding unit 1 is used for accommodating one side of the remaining n-1 coils 11, where n is greater than or equal to 2, and n is a positive integer. The n coils 11 of the winding unit 1 in the primary structure 100 are sequentially arranged and sleeved, so that the full slot rate of the coil winding can be increased, the thrust density of the linear motor is improved, and the size of the coil is reduced.

Preferably, as shown in fig. 2, the coil 11 is a hollow rectangular closed loop structure, the coil 11 includes a long side 112 and a short side 111, and the hollow area 113 of any number of coils 11 in the same winding unit 1 is used for accommodating the long sides 112 of the remaining n-1 coils 11. This design makes coil 11 in the winding unit 1 can establish by the cover to reduce the size of winding unit 1, increase the full groove rate of coil winding simultaneously, promote linear electric motor thrust density. It should be noted that, since the coil 11 is formed by a copper wire winding, the "rectangular closed-loop structure" defining the shape thereof may be a substantially rectangular closed-loop structure, without excluding other rounded rectangles, rounded squares, and the like similar to rectangles.

Illustratively, as shown in fig. 3, when n is 3 in the same winding unit 1, the hollow area 113 of any number of coils 11 can accommodate the long sides 112 of the remaining two coils 11. At this time, the linear motor is a three-phase linear motor, and the three coils 11 are a U-phase winding, a W-phase winding, and a V-phase winding, respectively. U, W, V the three-phase winding coil ring is buckled and closely connected, the assembly mode can also improve the rigidity of the winding unit 1, and avoid the winding heating to break the copper wire in the coil 11. In other embodiments, n may also be 2 or 4, and the corresponding linear motor is a two-phase linear motor or a four-phase linear motor. In other embodiments, the number and size of the coils 11 can be adjusted according to requirements, which is not illustrated here.

The plurality of coils 11 in the same winding unit 1 are sequentially fitted in the width direction of the coil 11, and the hollow region 113 of any one coil 11 accommodates the long sides 112 of the remaining coils 11.

Preferably, referring to fig. 4, the width of the coil 11 in the same winding unit 1 is w, and the width of the hollow area 113 is d ═ n-1) w. This design minimizes the size of the coil 11 in the width direction while ensuring that the hollow area 113 of any number of coils 11 in the same winding unit 1 accommodates the long sides 112 of the remaining n-1 coils 11, thereby reducing the size of the winding unit 1. It should be noted that the width occupied by the diameter of the copper wire itself is ignored here, wherein the hollow area 113 is designed to accommodate the long side of the remaining coil.

Optionally, the length of the long side 112 of the coil 11 is as larger as possible than the length of the short side 111, so that the contact area of the long sides 112 of the two coils 11 is as large as possible, so as to realize that the motor thrust density is as large as possible under the same size.

Alternatively, all coils 11 in the same winding unit 1 are of uniform size. Further, all coils 11 in the same winding unit 1 are of the same type. Here, the "same type" means that all the coils 11 in the same winding unit 1 have the same size, and the size, the winding direction, and the number of windings of the copper wires of the coils 11 are the same. Preferably, all the coils 11 in the same winding module 10 have the same size, so that the thrust generated by the primary structure is consistent in size and thrust density on the basis of ensuring the consistency of the overall structure of the primary structure.

As shown in fig. 3 and 5, both short sides 111 of all the coils 11 in the same winding unit 1 are bent toward the same side as the long side 112. This design facilitates the nested arrangement of coils 11 in the same winding unit 1.

Optionally, the bending angle of the short side 111 is 45 ° to 90 °. As shown in fig. 5, in the same coil 11, the bending angle α of one short side 111 is 45 ° to 90 °, and the bending angle β of the other short side is 45 ° to 90 °.

Illustratively, the bending angles of the two short sides 111 of the same coil 11 in the same winding unit 1 are the same. For example, the bending angle α of one short side 111 is 90 °, and the bending angle β of the other short side 111 is 90 °. In other embodiments, the bending angle α of the short side 111 on one side is 45 °, and the bending angle β of the short side 111 on the other side is 45 °. In other embodiments, α and β may also be different.

As shown in fig. 6 in conjunction with fig. 3, the long sides 112 of all the coils 11 in the same winding unit 1 are located on the same plane. This design allows the winding unit 1 to be smaller in size and the winding unit 1 to fit more closely in the same winding module 10, thereby reducing the volume of the winding module 10.

Preferably, the number of the winding units 1 in the same winding module 10 is two, and the two winding units 1 are attached back to back. In other words, the short sides 111 of the coils 11 of the two winding units 1 in the same winding module 10 are arranged oppositely, as shown in fig. 6-7, wherein the short side 111 of the coil 11 of one winding unit 1 faces upwards, and the short side 111 of the coil 11 of the other winding unit 1 faces downwards. This design allows for a tight fit of the two winding units 1 and thus a smaller overall size of the winding module 10.

Preferably, the included angle between the short side 111 and the long side 112 of all coils 11 in the same winding module 10 is equal. Further, the coils 11 in all the winding modules 10 in the primary structure 100 are the same, wherein all the coils 11 have the same size, all the coils 11 have the same number of coils, and the included angle between the short side 111 and the long side 112 is the same in all the coils 11.

It should be noted that, in the manufacturing process of the coil 11, a copper wire is wound into a substantially rectangular closed-loop structure according to design requirements, and then two short sides of the rectangular closed-loop structure are bent, so as to form the coil 11.

Preferably, referring to fig. 1, the primary structure 100 includes a plurality of winding modules 10, the winding modules 10 are sequentially arranged adjacently, and the winding modules 10 are encapsulated by an encapsulation compound to form an i-shaped primary structure.

Further, the plurality of winding modules 10 are arranged adjacent to each other in order in the width direction of the coil 11.

Preferably, the connecting lines of the center points of the plurality of winding modules 10 are straight lines. Further, all the winding modules 10 in the same primary structure 100 have the same structure, all the coils 11 have the same size, all the coils 11 have the same number of coils, and the acute bending angles between the short sides 111 and the long sides 112 in all the coils 11 are the same.

Example two

As shown in fig. 8 to 11, the present embodiment provides a linear motor, which includes a primary structure 100, a secondary structure 200, and a mounting plate 300, where one end of the primary structure 100 is disposed in the secondary structure 200, and the other end thereof is fixedly connected to the mounting plate 300. The primary structure 100 may be the primary structure of the linear motor in the first embodiment.

Preferably, the secondary structure 200 includes a U-shaped yoke plate 201 and permanent magnets 202, the permanent magnets 202 are disposed on the inner sides of two U-shaped arms of the U-shaped yoke plate 201, the primary structure is disposed between two rows of the permanent magnets 202, and the mounting plate 300 is fixedly connected to the primary structure 100 and located at the open end of the U-shaped yoke plate 201.

Illustratively, the U-yoke plate 201 is made of a ferrous material.

In the primary structure 100, the long side 112 of the coil 11 is arranged opposite to the permanent magnet 202, one short side 111 of the coil 11 extends into the U-shaped yoke plate 201, and the other short side 111 is fixedly connected with the mounting plate 300.

Primary structure 100 is i-shaped from a plurality of winding modules 10 by potting with an encapsulant. Fig. 8 to 9 are schematic external views of primary structure 100 after primary structure 100 is encapsulated, and fig. 10 to 11 are schematic views of a portion of winding module 10 inside primary structure 100.

Optionally, a cable is disposed in the mounting plate 300, and the cable is electrically connected to the primary structure 100 to provide power for the primary structure 100, so as to drive the linear motor.

It should be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The primary structure of the linear motor is characterized by comprising at least one winding module (10), wherein each winding module (10) comprises at least one winding unit (1), each winding unit (1) comprises n coils (11) which are sequentially arranged and sleeved, the coils (11) are in a hollow closed-loop structure, a hollow area (113) of any coil (11) in the same winding unit (1) is used for accommodating one side of the other n-1 coils (11), wherein n is not less than 2, and n is a positive integer.

2. Primary structure of a linear electric motor according to claim 1, characterized in that the coils (11) are hollow rectangular closed-loop structures, the coils (11) comprise long sides (112) and short sides (111), and the hollow area (113) of any number of coils (11) in the same winding unit (1) is used to accommodate the long sides (112) of the remaining n-1 coils (11).

3. The primary structure of a linear motor according to claim 2, wherein the width of the wire of the coils (11) in the same winding unit (1) is w, and the width of the hollow area (113) is d ═ n-1) w.

4. Primary structure of a linear electric motor according to claim 2, characterised in that all coils (11) in the same winding module (10) are of uniform size.

5. Primary structure of a linear motor according to claim 2, characterized in that the long sides (112) of all coils (11) in the same winding unit (1) are in the same plane.

6. Primary structure of a linear motor according to claim 2, characterized in that both short sides (111) of all coils (11) in the same winding unit (1) are bent to the same side of the long side (112).

7. Primary structure of a linear electric motor according to claim 6, characterized in that the bending angle of the short side (111) is 45 ° to 90 °.

8. Primary structure of a linear electric motor according to claim 7, characterised in that the bending angles of the two short sides (111) of the same coil (11) in the same winding unit (1) are the same.

9. Primary structure of a linear electric motor according to claim 6, characterised in that the number of winding units (1) in a winding module (10) is two, the two winding units (1) being arranged in a back-to-back abutment.

10. Primary structure of a linear electric motor according to any of claims 1-9, characterised in that a plurality of said winding modules (10) are arranged next to each other in sequence, said winding modules (10) being encapsulated by means of an encapsulating compound to form the primary structure.

11. Primary structure of a linear electric motor according to claim 10, characterised in that the connecting lines of the centre points of a plurality of said winding modules (10) are straight lines.

12. A linear electric motor comprising a primary structure of a linear electric motor as claimed in any one of claims 1 to 11.

13. A linear motor according to claim 12, further comprising a mounting plate (300) and a secondary structure (200), wherein the secondary structure (200) comprises a U-shaped yoke plate (201) and permanent magnets (202), the permanent magnets (202) are arranged on the inner sides of the two U-shaped arms of the U-shaped yoke plate (201), the primary structure is arranged between the two rows of the permanent magnets (202), and the mounting plate (300) is fixedly connected to the primary structure and located at the open end of the U-shaped yoke plate (201).