JPH076705Y2 - Movable element of polyphase type linear motor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving coil type linear motor of a multi-phase type linear motor, and relates to an improvement of a mover constituted by a coil for generating thrust and a carriage supporting the coil. Is.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a conventional multi-phase linear motor of this kind with a part of the cross section. Reference numerals 1a and 2a denote a pair of coils that are supported by the carriage 3a and generate thrust. The coils 1a and 2a and the carriage 3a form a motor mover C. 4 is a field pole made of a permanent magnet, 5 is a side yoke, 6 is a center yoke, 7 is a gap between the side yoke 5 and the field pole 4, and the motor mover C is vertically inserted into the gap 7. It is designed to do. It is well known that the field stator 4, the side yoke 5 and the center yoke 6 constitute a motor stator D.

Next, FIG. 6 is a plan view showing the motor mover C. In the figure, 8a is a coil effective length portion of the coils 1a and 2a for generating an effective thrust by the magnetic flux from the field pole 4 composed of a permanent magnet. , 9a is a coil width, and 10a is an inner diameter width of the coil. The coils 1a and 2a have the same shape and size and the same number of turns. In addition, 11a,
Reference numerals 11b, 11c and 11d denote both coils 1a and 2a.
4a, and 13a shows both coils 1
a is the overall width dimension of 2a.

Next, the principle of thrust generation of this type of linear motor will be described with reference to FIG. Now, when a predetermined current is applied to the coil 1a on one side, the respective coil surfaces 11b and 11b
In the d and the coil surfaces 11a and 11c, the current directions are necessarily opposite to each other, and when the field pole 4 is a single pole, the thrust directions generated are opposite directions and have the same magnitude. 1a cannot be moved. However, in FIG. 7, in order to move the coil 1a in the direction of the arrow X, the coil surfaces 11b and 11d must receive magnetic flux in opposite directions, and the field poles 4 arranged adjacent to each other have different polarities. If the multi-pole arrangement is adopted as described above, the thrusts generated on the coil surfaces 11b and 11d of the coil 1a are in the same direction by the “left-hand rule of framing”, the coil 1a can be moved, and the polarities of the magnetic poles are matched. If the direction of the coil current is changed by moving the coil current, the movement continues in the same direction.

The principle of thrust generation in the case of a single coil is as described above. In such a structure, when the coil stops at the magnetic pole changing point, the size is the same, but the coil width 9a.
Since thrust in the opposite direction is generated inside and it is impossible to escape from this position, in general, other coils are arranged with a phase shift with respect to the arrangement period of the field poles 4 to compensate for the decrease in thrust. However, in this case, the number of coils whose phases are shifted is referred to as “the number of phases”, and when the coils 1a and 2a are out of phase with each other in FIGS. 5 and 6,
This is called a "two-phase linear motor".

[0006]

As described above, the mover of the conventional polyphase linear motor of this type has the side yoke 5 as described above.
Since the motor mover C is inserted in the gap 7 between the field pole 4 and the field pole 4 in the vertical direction, in the case of the multi-phase mover C, in order to arrange the gap 7 without changing it. Has no means other than arranging the coils side by side. When the number of coils increases, the carriage 3a inevitably becomes longer in the lateral direction.
That is, there is a problem that the motor mover C becomes large and the weight thereof remarkably increases.

This invention has been made in view of such a problem, and one of the effective length portions of the other coil is inserted and arranged in the internal space between the effective length portions of one coil. By measuring the overall width of each coil,
In addition to downsizing and weight reduction of the carriage, that is, the motor mover including the coil, the coil is mounted on the outside of the carriage having the base body having a U-shaped cross section, and the inside of the base body is moved in the gap of the stator. The purpose of the present invention is to provide a multi-phase linear motor having a simple structure without using a separate guide by using it as a guide.

[0008]

A multi-phase linear motor according to the present invention is a strip field magnetic pole in which a large number of magnetic poles are arranged so that adjacent magnetic poles are different from each other. And a stator composed of a strip-shaped center yoke and a strip-shaped side yoke provided with a predetermined gap from the field pole, and a stator movably arranged in the gap of the stator, each having a different phase. In a device including a plurality of coils and a mover including a carriage that supports the plurality of coils, the carriage includes a flat surface portion and both side portions connected to the flat surface portion, and has a U-shaped cross section. The base of which the inside of the plane portion faces the field pole and the inside of the both sides faces the both sides of the stator, and which serves as a guide when moving in the gap of the stator, and the plane of the base Outside the section The number of grooves formed is twice as many as the number of the formed coils, and the coil mounting portion into which each coil is inserted and the groove portions of the base body are protruded to the outside of both side portions. A step is provided, and the dimension of the step increases by the thickness of the coil, and the step is repeated according to the number of phases of the coil. And a coil end portion storage portion for storing the end portion when the portion is bent toward both sides.

[0009]

According to the present invention, the carriage is composed of a flat surface portion and both side portions connected to the flat surface portion and has a U-shaped cross section. The inner side of the base is opposed to both sides of the stator, and serves as a guide when moving in the gap of the stator, and the number of coils formed by partitioning the outer side of the flat surface of the base is 2
A coil mounting portion having a double number of grooves, into which each coil is inserted, and step portions projecting to the outside of both side portions corresponding to the groove portions of the base body are provided, and When the dimensions are increased by the thickness of the coil and are repeated according to the number of phases of the coil, the coils are mounted in order from the groove with the smallest step size, and the ends are bent toward both sides. , And the coil end storing portion for storing the end portion thereof, one of the effective length portions of the other coil is inserted next to each other in order in the internal space between the effective length portions of one coil. Then, a plurality of coils are arranged. Also,
The inside of the base of the carriage serves as a guide when moving in the gap of the stator.

[0010]

1 to 4 show an embodiment of the present invention. First, as shown in the perspective view of a pair of coils shown in FIG. 1, the features of the coils 1b and 2b of the present invention are that the coils 1b that generate an effective thrust by magnetic flux from a field pole (not shown), 2b coil effective length portion 8b, coil width 9b and coil inner diameter width 10
Although b is the same, the lengths of the coil surfaces 11b and 11d are changed. 12 is the coil 1b,
2b is a thickness dimension, and 13b is a total width dimension of the coils 1b and 2b.

FIG. 2 is a perspective view of the motor mover A, and FIG. 3 is a perspective view of the motor mover A of FIG. 2 seen from the back side. 3b
Is a carriage in which a pair of coils 1b and 2b are wound so as to overlap with each other as shown in FIG.
Reference numeral 14 is a thickness dimension of the carriage 3b, and 15 is a partition portion which is integrated with the carriage 3b and partitions between the coils 1b and 2b to form four groove portions 18 which is twice the number of coils. Since one surface of the coil is inserted into the groove portion 18, its width is substantially equal to the coil width 9b.

Next, the carriage 3b will be described in detail. The carriage 3b is composed of a flat surface portion and both side portions connected to the flat surface portion, has a U-shaped cross section, and an inner side 16 of the flat surface portion. The field poles 4 are opposed to each other, and the inner sides 17 of the both sides are arranged to be opposite to the both sides of the stator. The base serves as a guide when moving in the gap of the stator, and the outer side of the flat portion of the base is partitioned. The number of groove portions 18 is twice as many as the number of the formed coils, and the coil mounting portion into which each coil is inserted and the groove portions 18 of the base body are protruded to the outside of both side portions. Is provided, and the step size 20 is increased by the thickness of the coil.
The coil ends are stored by repeating the process according to the number of phases of the coil, and mounting the coils in order from the groove with the smallest step size and bending the ends toward both sides. And a section. 2 and 3, since the number of coils is two, the number of steps of the step is two and the first step is the step size 20 of the coil. It consists of a second stage that is thicker than the thickness. When the number of coils is three, a first step, a second step, and a third step having a step size 20 larger than the second step by the thickness of the coil are provided. That is, the dimension of the step increases by the thickness of the coil with respect to the first step.

Next, FIG. 4 shows a multi-phase linear motor constituted by a motor mover A according to the present invention, a field pole 4, a side yoke 5, and a motor stator B composed of a center yoke 6. It is a perspective view.

The coils 1b and 2b according to the present invention are shown in FIG.
The carriage 3 having the shape shown in FIG. 2 and FIG. 3 is not mounted by preliminarily winding the shape as shown in FIG.
The coil 1b is wound directly from the inner one coil 2b, and the coils 1b and 2b have a coil effective length portion 8b for generating an effective thrust, a coil width 9b, and an inner diameter width 10b of the coil, respectively. Although the same, the lengths of the coil surfaces 11b and 11d are changed, and as shown in FIG.
By bending 1c inward in the same direction, the coil 1b is coiled between the coil surfaces 11b and 11d of the one coil 1b, that is, in the inner space between the coil effective length portions.
It is designed so that one of the effective length parts of b can be inserted.
In other words, one coil effective length portion 8b of the other coil 2b is inserted and arranged on the same plane in the internal space between the coil effective length portions 8b of the one coil 1b. It is a thing. With such a configuration, as shown in FIG. 1, a plurality of coils can be staggered one by one and stacked without changing the thickness 12 of the coil.
Not only is b reduced to half as compared with the conventional one, but the pair of coils 1b and 2b are out of phase with respect to the magnetic pole arrangement period.

Further, since the carriage 3b winds the coils 1b, 2b and supports them, it is preferable that the carriage 3b is as thin as possible, lightweight and highly rigid, and that the coils 3b, 2b are connected to each other. It goes without saying that the partitioning part 15 is present as a reinforcing material. Further, as shown in FIGS. 2 and 3, if the carriage 3b is not integrally molded and can be divided into two parts from an appropriate portion, the coil 1b preliminarily wound into a shape as shown in FIG.
It is also possible to fit the 2b into the carriage 3b.

In the above-described embodiment, the two-phase linear motor in which the pair of coils 1b and 2b are superposed and arranged has been described. However, if the coils are arranged so as to be shifted in phase, respectively. Not only can it be manufactured as 4-phase or 6-phase freely, but the coil surfaces 11a, 11c at both ends of each coil 1b, 2b can be bent in any direction depending on the condition of the mounting space for the linear motor. May be.

[0017]

As described above, according to the present invention, the carriage is composed of the flat surface portion and the both side portions connected to the flat surface portion and has a U-shaped cross section, and the inside of the flat surface portion is the field pole. A coil formed by partitioning the base body, which is opposed to the inside of both side portions and faces both side portions of the stator, and which serves as a guide when moving in the gap of the stator, and the outside of the flat portion of the base body. And a coil mounting portion into which each coil is inserted, and step portions protruding outward on both sides corresponding to the groove portions of the base body are provided. The step size increases by the thickness of the coil, and the step size is repeated according to the number of phases of the coil. The coils are mounted in order from the groove with the smallest step size, and the ends are located on both sides. When folded in, the coil end storage part that stores the end part Since has become the guide when inner base of the carriage is moved in the gap of the stator, thereby simplifying the structure there is no need to provide a guide separately. In addition, the coil mounting portion and the coil end portion storage portion are arranged such that one of the effective length portions of the other coil is inserted next to each other in the internal space between the effective length portions of one coil side by side to insert a plurality of coils. Since the coils are arranged, the overall lateral width of the plurality of coils is remarkably shortened, and the motor mover can be made smaller and lighter.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pair of coils according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a motor mover according to an embodiment of the present invention.

FIG. 3 is a perspective view of a motor mover according to an embodiment of the present invention as viewed from the back side.

FIG. 4 is a perspective view of a polyphase linear motor according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a cross section of a part of a conventional polyphase linear motor.

FIG. 6 is a plan view showing a conventional motor mover.

FIG. 7 is an operation explanatory view showing one coil and a field pole.

[Explanation of symbols]

 1b coil 2b coil 3b carriage 4 field pole 5 side yoke 6 center yoke 8b coil effective length portion 9b coil width 10b coil inner diameter width 11a coil surface 11b coil surface 11c coil surface 11d coil surface 12 coil thickness dimension 13b both coils Overall width 15 Partitions 16 Inside flat surface of carriage base 17 Inside both sides of carriage base 18 Grooves 19 Step 20 Dimension of step A Motor mover B Motor stator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kunio Fujiwara, Kunio Fujiwara, 8-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Sanryo Electric Co., Ltd., Production Engineering Laboratory (56) Reference JP-A-53-147219 (JP, A) ) Japanese Patent Laid-Open No. Sho 56-114012 (JP, A) Actually opened Sho 57-189285 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A band-shaped field magnetic pole in which a large number of magnetic poles are arranged so that adjacent magnetic poles are different from each other, a band-shaped center yoke closely attached to the back of the field magnetic pole, and the field magnetic pole. From a stator composed of a band-shaped side yoke provided with a predetermined gap, a plurality of coils movably arranged in the gap of the stator and having different phases, and a carriage supporting the plurality of coils. In the multi-phase linear motor including the movable element, the carriage is composed of a flat surface portion and both side portions connected to the flat surface portion, and has a U-shaped cross section, and the inside of the flat surface portion is the A base body facing the field pole, the inner sides of the both sides facing the both side portions of the stator, serving as a guide when moving in the gap of the stator, and the outer side of the flat portion of the base body. Partition and form The number of groove portions is twice as many as the number of the formed coils, and the coil mounting portion into which each coil is inserted, and the groove portions of the base body are protruded to the outside of the both side portions, respectively. A step is provided, and the dimension of the step increases by the thickness of the coil, and the step is repeated according to the number of phases of the coil, and the coil is mounted in order from the groove having the smallest step size. A multi-phase linear motor, comprising: a coil end housing portion that houses the end portion when the end portion is bent toward the both side portions.