WO2020015549A1

WO2020015549A1 - Linear electrical mashine

Info

Publication number: WO2020015549A1
Application number: PCT/CN2019/095160
Authority: WO
Inventors: 冯蓬勃; 曹娟娟; 孙颖
Original assignee: 歌尔股份有限公司
Priority date: 2018-07-16
Filing date: 2019-07-09
Publication date: 2020-01-23
Also published as: CN109039003A

Abstract

A linear electrical machine, comprising: a U-shaped slot assembly (1), the U-shaped slot assembly (1) comprising a U-shaped slot structure and oblique pole permanent magnets (14) arranged oppositely on the inner sides of both side walls of the U-shaped slot structure; and a T-shaped assembly (2) comprising a coil group (22) which is located between two rows of the permanent magnets (14) and has an iron core (23). The U-shaped slot assembly (1) is a rotor, and the T-shaped assembly (2) is a stator; or the U-shaped slot assembly (1) is a stator, and the T-shaped assembly (2) is a rotor. One technical effect achieved by this solution is that the cogging effect in the linear electrical machine can be reduced.

Description

Linear motor

Technical field

The present invention relates to the technical field of motors, and more particularly, the present invention relates to a linear motor.

Background technique

As a zero-drive drive mechanism, a linear motor does not require an intermediate drive mechanism, and has the advantages of high accuracy, high dynamic response, and high rigidity. In addition, because there is no wear of the transmission, the mechanical loss is extremely small, and the maintenance requirement of the linear motor is low, so it has high reliability and long life. Therefore, the application of linear motors is becoming more and more widespread.

Generally, a linear motor with an iron core is provided with an iron core in a coil group, which is widely used in high-speed CNC machining centers, vertical lifting conveyor systems, high-speed ground transportation systems, reciprocating air compressors and other fields, which can provide faster Responsiveness, large load, and rigidity can be guaranteed during machine processing or thrust application.

In the application of this type of linear motor, due to the joint effect of the end effect and the cogging effect, this type of motor has the disadvantage of large thrust fluctuations. Therefore, it is necessary to provide a new technical solution to optimize the performance of such linear motors.

Summary of the invention

An object of the present invention is to provide a new technical solution for a linear motor.

According to an aspect of the present invention, there is provided a linear motor, comprising a U-shaped groove-shaped component, the U-shaped groove-shaped component including a U-shaped groove structure and oppositely arranged on two sides of the U-shaped groove structure Oblique pole permanent magnets inside the wall; and

T-shaped component, the T-shaped component includes a coil group with an iron core located between two rows of the permanent magnets;

The U-shaped slot-shaped component is a mover, and the T-shaped component is a stator; or, the U-shaped slot-shaped component is a stator, and the T-shaped component is a mover.

Optionally, the permanent magnets on the two side walls are arranged symmetrically.

Optionally, the permanent magnets on the two side walls are arranged in parallel.

Optionally, the permanent magnets are arranged side by side on two side walls.

Optionally, the U-shaped groove structure is a magnetically permeable material.

Optionally, the T-shaped component includes a fixing plate, and the coil group is disposed on the same side of the fixing plate.

Optionally, a clamping portion extends from both ends of the fixing plate in the sliding direction, and the coil group is disposed between the two clamping portions.

Optionally, the coil group includes a through hole, and the iron core is disposed in the through hole.

Optionally, potting glue is coated on the coil group.

Optionally, the movers are provided in multiple groups and are arranged in parallel on the same stator.

One technical effect of the present invention is that the cogging effect of the linear motor can be reduced.

Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which form a part of the specification, describe embodiments of the invention and, together with the description, serve to explain the principles of the invention.

1 is a schematic diagram of a linear motor provided by a specific embodiment of the present invention;

2 is a schematic diagram of a U-shaped groove-shaped component provided by a specific embodiment of the present invention;

3 is an exploded view of a U-shaped groove-shaped component provided by a specific embodiment of the present invention;

4 is a schematic diagram of a T-shaped component provided by a specific embodiment of the present invention;

5 is an exploded view of a T-shaped component provided by a specific embodiment of the present invention;

6 is a schematic diagram of a T-shaped component provided by a specific embodiment of the present invention;

7 is a schematic diagram of a linear motor provided by a specific embodiment of the present invention;

FIG. 8 is a schematic diagram of a linear motor provided by a specific embodiment of the present invention.

among them:

1-U-shaped slot-shaped component, 11-upper plate, 12-side plate, 13-lower plate, 14-permanent magnet, 2-T-shaped component, 21-fixing plate, 22-coil group, 23-iron core, 24 -Clamping section.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually merely illustrative and is in no way intended to limit the invention and its application or uses.

Techniques and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but where appropriate, the techniques and equipment should be considered as part of the description.

In all examples shown and discussed herein, any specific value should be construed as exemplary only and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

The present invention provides a linear motor, as shown in FIG. 1, including a U-shaped groove-shaped component 1 and a T-shaped component 2.

Specifically, as shown in FIG. 2-3, the U-shaped groove-shaped component 1 includes a U-shaped groove structure and oblique pole permanent magnets 14 which are oppositely arranged inside two side walls of the U-shaped groove structure. The U-shaped groove structure includes a side plate 12 and an upper plate 11 and a lower plate 13 provided on the same side of the side plate 12. The upper plate 11 and the lower plate 13 form a side wall of the side plate 12, and the permanent magnet 14 is provided on the upper plate. 11 and the inner wall of the lower plate 13.

As shown in FIG. 4-5, the T-shaped component 2 includes a coil group 22 located between two rows of permanent magnets 14. A through hole is provided in the coil group 22, and an iron core 23 is provided in the through hole. Specifically, the T-shaped component 2 further includes a fixing plate 21, and both ends of the fixing plate 21 in the sliding direction are provided with clamping portions 24 for fixing the coil group 22, and the coil group 22 is fixed in front of the clamping portion 24. The fixing plate 21 is made of a non-magnetic material.

When the coil group 22 is energized, a magnetic field force is generated between the U-shaped slot-shaped component 1 and the T-shaped component 2 and can drive the relative movement of the two. Among them, when the U-shaped slot-shaped component 1 is used as a stator of the motor, the T-shaped component 2 is a mover of a linear motor. After the coil group 22 is energized, the T-shaped component 2 can slide in the U-shaped slot component 1 so that it can be slid. Connect with other objects and drive them into motion. When the T-shaped component 2 is used as the stator of the linear motor, the U-shaped slot-shaped component 1 is a mover of the linear motor. After the coil group 22 is energized, the U-shaped slot-shaped component 1 can slide on the T-shaped component 2 so that it can communicate with the T-shaped component 2. Other objects connect and drive them to move.

Generally, when the T-shaped component 2 is used as a mover of a linear motor, the wires connecting the coil group 22 need to move along with the T-shaped component 2, and a tow chain needs to be added to the wires to facilitate its movement. In contrast, when the U-shaped slot-shaped component 1 is used as the mover of the linear motor, the T-shaped component 2 as the stator of the linear motor does not need to be moved. The wires connected to the coil group 22 are fixed, which can increase the service life of the wires. There is no need to add an energy chain, which avoids occupying extra space and reduces the maintenance cost of the linear motor.

In the linear motor provided by the present invention, the permanent magnets 14 are provided on the upper and lower sides of the coil group 22. By adding an iron core 23 in the coil group 22, a dual magnetic circuit is formed, which increases the magnetic flux of the air gap magnetic field and further improves the magnetic field The utilization rate increases the thrust of the linear motor mover. At the same time, the permanent magnet 14 is arranged on the upper plate 11 and the lower plate 13 in an oblique pole manner. In this way, the cogging effect between the iron core 23 in the coil group 22 and the permanent magnet 14 can be reduced, and the lift can be improved. The smoothness of the linear motor is improved.

In addition, U-shaped slot-shaped component 1 and T-shaped component 2 can realize modular design and assembly, which is convenient for the production and assembly of linear motors. It can also reduce the difficulty of maintenance and reduce the maintenance costs of linear motors in the later stage.

Specifically, the permanent magnets 14 are rectangular and are arranged side by side on the inner wall of the upper plate 11 and the lower plate 12, and the long and short sides of each permanent magnet 14 are parallel to the long and short sides of other permanent magnets 14, so that the permanent magnets 14 The position between 14 is more compact. The shape and thickness of the permanent magnet 14 are not limited in the present invention, and any scheme that can achieve the same technical effect belongs to the protection scope of the present invention.

Further, the upper plate 11 and the lower plate 12 are arranged in parallel, and at the same time, the planes of the permanent magnets 14 on the inner wall of the upper plate 11 and the lower plate 12 are parallel to each other, so as to increase the strength of the magnetic field, thereby increasing the thrust of the linear motor mover.

Further, the upper plate 11 and the permanent magnets 14 on the inner side wall of the lower plate 12 are symmetrically arranged, and the positions of the upper plate 11 and the permanent magnets 14 on the inner side wall of the lower plate 12 can be completely corresponded in a symmetrical manner, so that With the same arrangement angle, the strength of the magnetic field can be increased, and the thrust of the linear motor mover can be improved. In addition, with a symmetrical structure, the effective utilization of the coil section of the coil group 22 for cutting the magnetic induction line is improved, which can reduce the end effect, reduce the end force, thereby reducing the loss of the linear motor and reducing the internal heating of the motor.

Specifically, the upper plate 11, the side plate 12, and the lower plate 13 are all magnetically conductive materials. The magnetic material is used for the side plate 12, which increases the magnetic path, can increase the strength of the magnetic field, and can further increase the thrust of the linear motor. For example, the magnetically permeable material is iron, which is not limited in the present invention.

As shown in FIG. 6, a potting compound is coated on the coil group 22. The potting compound is used to fill the gap between the coil groups 22 and between the coil group 22 and the fixing plate 22, so that the coil group can be more stably set on the fixing plate 22. At the same time, the potting compound has good heat dissipation ability. Furthermore, the heat generated during the operation of the coil group 22 is released in time. In addition, a potting compound is applied to the coil group 22, which can also protect the coil 22, avoid collision damage during assembly and maintenance, and prevent dust and liquid from entering the coil group 22. Its performance is affected. Optionally, the potting compound is an epoxy potting compound.

As shown in FIG. 7, the U-shaped slot-shaped component 1 is a stator, the T-shaped component 2 is a mover, and three T-shaped components 2 are provided. Specifically, after the coil groups 22 of the three T components 2 are energized, they can slide on the U-shaped groove-shaped component 1. In addition, by changing the current in the coil groups 22 of the three T components 2, The sliding speed and thrust of each T component 2 are different, and can be selected according to actual conditions in actual applications to meet more needs. The three T-components 2 can be connected with objects to drive them to move, so that multiple objects can be driven and moved at the same time to improve work efficiency. At the same time, the three T-components 2 can be connected to one object and driven at the same time. Increase thrust.

As shown in FIG. 8, the U-shaped slot-shaped component 1 is a mover, the T-shaped component 2 is a stator, and three U-shaped slot-shaped components 1 are provided. Specifically, all three U-shaped groove-shaped components 1 can slide on the U-shaped groove-shaped component 1. In addition, by changing the magnetic field strength of the three U-shaped groove-shaped components 1, the three U-shaped groove-shaped components 1 can be realized. The sliding speed and thrust of the component 1 are different, and can be selected according to actual conditions in actual applications to meet more requirements. The three U-shaped slot-shaped components 1 can be connected with objects to drive them to move, so that multiple objects can be driven and moved at the same time to improve work efficiency. At the same time, the three U-shaped slot-shaped components 1 can be connected to one at the same time. Drive on the object to increase thrust. In addition, when the U-shaped slot-shaped component 1 is used as the mover, the T-shaped component 2 as the stator of the linear motor does not need to be moved. The wires connecting the coil group 22 are fixed and only one set is provided, which can increase the service life of the wires , Reduce production costs, at the same time, do not need to add towline, avoid taking up additional space, and reduce the maintenance costs of linear motors.

Those skilled in the art may also choose to set two, four, or more movers, which is not limited in the present invention, and the change in the number of these movers belongs to the protection scope of the present invention.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A linear motor, comprising a U-shaped slot-shaped component, the U-shaped slot-shaped component including a U-shaped slot structure and oblique pole permanent magnets arranged oppositely inside the two side walls of the U-shaped slot structure; as well as

T-shaped component, the T-shaped component includes a coil group with an iron core located between two rows of the permanent magnets;

The U-shaped slot-shaped component is a mover, and the T-shaped component is a stator; or, the U-shaped slot-shaped component is a stator, and the T-shaped component is a mover.
The linear motor according to claim 1, wherein the permanent magnets on the two side walls are arranged symmetrically.
The linear motor according to claim 1, wherein the permanent magnets on two side walls are arranged in parallel.
The linear motor according to claim 1, wherein the permanent magnets are arranged side by side on two side walls.
The linear motor according to claim 1, wherein the U-shaped groove structure is a magnetically conductive material.
The linear motor according to any one of claims 1 to 5, wherein the T-shaped component includes a fixed plate, and the coil group is disposed on the same side of the fixed plate.
The linear motor according to claim 6, wherein a clamping portion extends from both ends of the fixing plate in the sliding direction, and the coil group is disposed between the two clamping portions.
The linear motor according to claim 1, wherein the coil group includes a through hole, and the iron core is disposed in the through hole.
The linear motor according to claim 1, wherein a potting compound is coated on the coil group.
The linear motor according to claim 1, wherein the mover is provided in a plurality of groups, and is arranged in parallel on the same stator.