KR20120080021A

KR20120080021A - Linear synchronous motor

Info

Publication number: KR20120080021A
Application number: KR1020110001437A
Authority: KR
Inventors: 정명진
Original assignee: 한국산업기술대학교산학협력단
Priority date: 2011-01-06
Filing date: 2011-01-06
Publication date: 2012-07-16

Abstract

According to the present invention, since the motor coils are disposed symmetrically on both sides and have permanent magnets facing each of the motor coils on both sides, the coil core is modularized as well as there is no induction of deformation due to suction force acting perpendicular to the driving force. Since the propulsion force is changed when the number of unit cores is composed of unit cores of, the linear synchronous motor can be easily assembled at low cost.

Description

Linear Synchronous Motor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to a linear synchronous motor applicable to machine tools, semiconductors, and liquid crystal display (LCD) manufacturing equipment requiring large thrust.

In general, as a method of generating propulsion force to the device for transferring the transfer object to the desired position has been mainly used to transfer the rotational force from the rotary motor (motor) to the transfer unit, which is not only poor propulsion efficiency There is a problem that the structure is inevitably complicated because it must have a means for converting the rotational motion into a linear motion, for example, a ball screw or a rack and pinion.

Accordingly, in recent years, a linear motor having excellent propulsion efficiency and a simple structure has been widely used in place of a rotary motor. The linear motor has a structure in which the rotor side and the stator side of the rotary motor are cut in the radial direction and developed in a flat plate shape, which is similar in principle to a rotary motor.

Such linear motors can be classified into inductive and synchronous motors. In the case of linear synchronous motors, there is no power exchange between the field and the armature to increase the air gap, and there is no dynamic end effect, resulting in good efficiency. As a result, the driving force is larger than that of the linear induction motor, which makes it suitable for high speed applications.

1 is a block diagram illustrating a general linear synchronous motor. As shown, the linear synchronous motor includes a mover 101 and a stator 105, which move a coil core 102 and a motor. The coil 104 is included, and the stator 105 includes a plurality of permanent magnets 106.

The coil core 102 is formed long in one direction. This coil core 102 has a plurality of teeth (103) to which the motor coil 104 is wound, the plurality of teeth (103) being coil cores (102) on either side of the coil core (102). Are spaced apart from each other along the longitudinal direction of the < RTI ID = 0.0 >

The permanent magnets 106 are arranged along the longitudinal direction of the coil core 102 so as to oppose the motor coil 104 wound around the tooth 103 of the coil core 102 with a space therebetween. The permanent magnets 106 are also arranged such that their polarities alternate.

When a general linear synchronous motor having such a configuration supplies power to the motor coil 104, a magnetic field is formed between the motor coil 104 and the permanent magnet 106, and a driving force capable of moving the mover 101 by the magnetic field. Because of this, the mover 101 is in a linear motion due to this driving force.

However, since the linear synchronous motor described above has a one-sided structure in which the motor coil 104 is disposed only on one side, a suction force (see reference numeral A) that occurs in a direction perpendicular to the propulsion force is generated, causing deformation such as torsion. In addition, there was a design complexity that must add a guide to prevent such deformation.

In addition, looking at the manufacturing process, having a coil core 102 of various lengths to selectively have a level of driving force required by applying selectively, bar coil 103 in the tooth 103 for each different length of the coil core 102 Since a dedicated jig for winding 104 is required, there is a problem of high manufacturing cost. That is, there was a problem that the mass production is not good.

The background art described above is a technique possessed by the inventors for the derivation of the present invention, or a description of the technology acquired in the derivation process of the present invention.

It is an object of the present invention to provide a linear synchronous motor which is free from deformation (particularly torsional) due to suction forces acting in a direction perpendicular to the thrust force.

Another object of the present invention is to provide a linear synchronous motor that can be easily manufactured at low cost to have the required level of thrust force.

The problem to be solved by the present invention is not limited to the above problem, other problems that are not mentioned will be clearly understood by those skilled in the art from those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a coil core having a plurality of teeth arranged in a row and a motor coil wound around both teeth of the coil core; A linear synchronous motor is provided including a stator having permanent magnets arranged so as to oppose each of the two motor coils with a space therebetween and at the same time the polarity (N pole and S pole) are alternately arranged along the direction of the tooth.

It is preferable that the tooth of one side and the other side of the linear synchronous motor according to the embodiment of the present invention is symmetrical with respect to the center of the coil core.

The mover of the linear synchronous motor according to the embodiment of the present invention has a plate-shaped yoke (yoke) formed to be elongated in one direction, the coil core of the linear synchronous motor according to the embodiment of the present invention is the lower side of the yoke The tooth may be provided at right and left sides while being mounted to be positioned along the longitudinal direction.

Here, the mover may have a coil covering that covers and wraps the motor coil together with the coil core.

In addition, the coil core may be composed of a plurality of unit cores, each of which is provided with at least one tooth to the left and right and is spaced apart from each other along the longitudinal direction of the yoke. At this time, the yoke is provided with a projection along the longitudinal direction in the lower central portion, the unit core may be mounted to this projection. In addition, the lower side of the yoke may be provided with a plurality of protruding jaw portion which is interposed between the unit cores adjacent to each other to guide the positioning of the unit core.

According to an embodiment of the present invention, a coil core having a long yoke in one direction, a plurality of teeth mounted on the yoke and arranged along the length of the yoke, and a coil core of the coil core A mover having a motor coil wound around the teeth; And a stator having permanent magnets arranged to alternately polarize (N pole and S pole) along the arrangement direction of the tooth while opposing the motor coil with a space therebetween, wherein the coil core includes at least one tooth. And the yoke is provided with a linear synchronous motor comprising a plurality of unit cores each mounted so as to be spaced apart from each other along the yoke in the longitudinal direction thereof.

According to the present invention, since the motor coils are disposed on both sides of the coil core (preferably arranged to be symmetrical) and have permanent magnets facing the motor coils on both sides, the torsion due to the suction force acting perpendicular to the driving force There is an advantage that there is no cause of deformation.

In addition, since the coil core is composed of a plurality of modular unit cores, the present invention can have a level of driving force required by varying the number of unit cores, and thus, improved assembly performance can be expected and manufacturing cost can be expected. There is an advantage that can be greatly reduced.

1 is a configuration diagram showing a state in which a general linear synchronous motor is seen from above.
2 is a perspective view showing a linear synchronous motor according to the present invention.
3 is a front view showing a linear synchronous motor according to the present invention.
4 is an exploded perspective view illustrating the mover illustrated in FIGS. 2 and 3.
5 is a bottom view of FIG. 4.
6 and 7 are diagrams showing a state in which the linear synchronous motor according to the present invention is viewed from above, and shows an example in which the driving force is changed.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention. For reference, in describing the present invention, the size of the components shown in the accompanying drawings, the thickness of the line, etc. may be somewhat exaggerated for convenience of understanding. The terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may vary depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of this term should be based on the contents of this specification as a whole.

2 and 3 are a perspective view and a front view showing a linear synchronous motor according to the present invention. As shown in Figs. 2 and 3, the linear synchronous motor according to the present invention includes a mover (2) and a stator (4). Include.

The mover 2 includes a mover yoke 10 having a substantially flat plate-like structure formed long in the front-rear direction, a coil core 20 mounted below the mover yoke 10, and assembled to the coil core 20. The motor coil 30 and the coil covering 40 which coat | covers the coil core 20 including this motor coil 30 are included.

4 is an exploded perspective view showing the mover 2, and FIG. 5 is a bottom view of FIG.

2 to 5, the coil core 20 has an elongated structure in the longitudinal direction, which is the longitudinal direction of the mover yoke 10. On the left side and the right side of the coil core 20, a plurality of teeth 22 around which the motor coil 30 is wound are provided.

The coil core 20 is composed of a plurality of unit cores 20A in which six teeth 22 are provided, three each on the left and right.

Of the tooth 22 of the unit core 20A, four are respectively located in the front-back side of the core body which comprises the unit core 20A, and the remaining two are located in the center part, and the tooth 22 of the left and right sides is located. They are arranged in a line so as to be spaced apart from each other in the front and rear directions. At this time, the teeth 22 on the left and right sides are spaced at equal intervals and are formed to be symmetrical with respect to the center of the core body.

The mover yoke 10 is provided with protrusions 12 having a constant height and width along the front and rear directions in the center of the lower side, and the unit cores 20A are arranged in a row so as to be spaced apart from each other along the front and rear directions. The core body is fastened to the protrusion 12 of the 10 by the fastening pin 50, respectively. The width of the protrusion 12 is smaller than the width of the core body, so that the tooth 22 of the unit core 20A is spaced a certain distance from the lower side of the mover yoke 10.

In order to fasten the unit cores 20A using the fastening pins 50, the protrusion 12 is provided with a fastening hole 14, the core body is provided with a through hole 24, and the fastening pins 50 are The through hole 24 is penetrated and fastened to the fastening hole 14. At this time, the fastening hole 14 may be a female screw hole, and the fastening pin 50 may be formed with a male screw engaged with the female screw hole.

The protruding portion 12 is provided with a protruding jaw portion 16 which is positioned so as to be interposed between the unit cores 20A adjacent to each other and assists in positioning the unit core 20A. At this time, the protruding jaw portions 16 are adjacent to each other such that the interval (tooth spacing of neighboring unit cores) indicated by reference numeral G1 in FIG. 5 is equal to the interval (interval between adjacent tooth of the unit cores) indicated by reference numeral G2. It is formed to have a length before and after which the unit core 20A can be spaced apart.

2 and 3, the stator 4 includes a stator yoke 60 and a plurality of permanent magnets 70. A plurality of permanent magnets 70 are arranged in a row along the front-back direction by a plurality of left and right sides of the mover 2 so as to face the air coils 30 on the left and right sides, respectively. The permanent magnets 70 on the left and right sides are arranged so that their polarities, that is, the N pole and the S pole, are alternated. This permanent magnet 70 is mounted to the stator yoke 60.

As described above, when the power is supplied to the motor coil 30, a magnetic field is formed between the motor coil 30 and the permanent magnet 70, and a propulsion force capable of moving the mover 2 is generated due to the magnetic field. The linear movement of the mover 2, the motor coil 30 has a bilateral structure in which the motor coil 30 is symmetrically disposed on both sides, so that the suction force acts in the direction perpendicular to the driving force (see reference numeral B in FIG. 3). There is no cause of deformation such as torsion. In other words, as the suction force acts symmetrically, it is canceled and no deformation is caused.

6 and 7 is a configuration diagram showing a state seen from above the linear synchronous motor according to the present invention. As shown in FIG. 6 and FIG. 7, the present invention can be easily manufactured at low cost since the coil core 20 is composed of a plurality of modular unit cores 20A. .

To illustrate this, the example shown in FIG. 7 has a longer length than the example shown in FIG. 6 (the coil core consists of two unit cores) since the coil core 20 consists of three unit cores 20A. Propulsion can be ensured (in the example of FIGS. 6 and 7, FIG. 6 is for the small thrust force generating a relatively small thrust force, and FIG. 7 is for the large thrust force that generates a relatively large thrust force). Assembling of the core 20 arranges the plurality of unit cores 20A along the front and rear directions on the protrusion 12 so that the protrusion jaw 16 is located between them, and uses the fastening pin 50 to the protrusion 12. The unit cores 20A are fastened respectively. Accordingly, it is possible to provide a linear synchronous motor having a driving force of a level required by varying the number of unit cores 20A constituting the coil core 20.

The present invention has been described above, but the present invention is not limited to the embodiments disclosed in the present specification and the accompanying drawings, and those skilled in the art without departing from the technical spirit of the present invention (a general knowledge in the technical field to which the present invention belongs). Can be variously modified.

For example, in the above description, three teeth 22 are provided on the left and right sides of the unit core 20A, and a total of six teeth 22 are provided. It may be provided or may be provided four or more.

2: mover 4: stator
10: mover yoke 12: protrusion
16: protrusion jaw 20: coil core
20A: Unit Core 22: Tooth
30: motor coil 40: coil covering
50: fastening pin 60: stator yoke
70: permanent magnet

Claims

A mover having a coil core with a plurality of teeth arranged in a row on both sides and a motor coil wound around both teeth of the coil core;
And a stator having permanent magnets arranged so as to face each of the motor coils with a space therebetween and at the same time alternate polarity along the direction of the tooth arrangement.

The method according to claim 1,
The tooth of one side and the other side are symmetrical linear synchronous motors.

The method according to claim 1 or 2,
The mover has a mover yoke in one direction,
The coil core is provided with the tooth on the left and right, and the linear synchronous motor mounted to the lower side of the mover yoke along the longitudinal direction of the mover yoke.

The method according to claim 3,
And the mover has a coil sheath covering the motor coil with the coil core.

The method according to claim 3,
The coil core includes a plurality of unit cores each provided with at least one tooth to the left and the right side and spaced apart from each other along the longitudinal direction of the mover yoke.

The method according to claim 5,
The mover yoke is provided with a projection along the longitudinal direction in the lower central portion,
The unit core is a linear synchronous motor mounted to the protrusion.

The method according to claim 5,
And a plurality of protruding jaw portions provided between the unit cores adjacent to each other below the mover yoke to guide positioning of the unit cores.

A mover yoke in one direction, having a coil core mounted on the mover yoke and having a plurality of teeth arranged along the longitudinal direction of the mover yoke and a motor coil wound around the teeth of the coil core;
And a stator having permanent magnets arranged to alternately polarize along the array direction of the tooth at the same time facing the motor coil with a gap therebetween,
Wherein said coil core has at least one tooth and is comprised of a plurality of unit cores each mounted on said mover yoke so as to be spaced apart from each other along the longitudinal direction of said mover yoke.