JP2002034230A - Armature of linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the armature of a linear motor that enables enhancement in workability in wining armature coils on teeth portion and of the space factor of the armature coils in slots. SOLUTION: Of the armature coils 6 wound on the teeth 5A of the armature core 5 of the linear motor 1, the first armature coils 61, 63, 65, 67, and 69 are wound on alternate teeth 5A and are installed on the bottom of slots 5B. Second armature coils 62, 64, 66, and 68 are wound on teeth 5A without having the first armature coil 61, 63, 65, 67, and 69 wound thereon, and are installed at the upper part of the slots 5B. As a result, the nozzle of a coil-winding machine is prevented from being brought into contact with the first armature coil wound previously, and the air gaps in the slots 5B can be reduced in size. This enables enhancement in winding workability and of the space factor of the armature coils 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature of a linear motor used for feeding a table of a machine tool or the like.

[0002]

2. Description of the Related Art Conventionally, a linear motor used for feeding a table of a machine tool or the like is configured as shown in FIG. FIG. 2 shows a side sectional view of a conventional linear motor. In the drawings, an example of a gap-facing type linear motor having eight poles and nine slots and in which a field pole and an armature face each other through a magnetic gap will be described. In the figure, 11 is a linear motor, 2 is a field yoke, 3 is a permanent magnet, 4 is an armature, 5
Is an armature core, 5A is a tooth, 5B is a slot, and 7 is an armature coil. In the linear motor 11, a plurality of permanent magnets 3 are arranged so that the magnetic poles are alternately different from each other in the longitudinal direction of the plate-shaped field yoke 2 so as to constitute a field pole serving as a stator. Further, an armature 4 as a mover opposed to a row of the permanent magnets 3 constituting the field poles via a gap is provided, and the armature 4 is formed by punching an electromagnetic steel plate into a comb shape.
An armature core 5 is formed by stacking and fixing an armature iron plate having teeth 5A forming a semi-closed slot 5B therebetween, and an armature coil 6 housed in these slots 5B. Specifically, a table (not shown) is attached to the upper surface of the armature, in which the armature coil 7 is wound so as to occupy the left and right halves in the slot 5B. In such a configuration, the armature coil 7 of the linear motor 11
When power is supplied to the armature, the armature moves in the axial direction by the electromagnetic action of the armature coil 7 and the permanent magnet 3.

[0003]

However, conventionally, when the armature coil 7 is directly wound around the teeth 5A of the laminated armature core 5 constituting the armature 4 of the linear motor 11 by a winding machine, In order to prevent the nozzle portion of the winding machine (not shown) from contacting the adjacent armature coil 7 already wound, it is necessary to secure a gap in the center of the slot, so that the occupancy cannot be increased. There was a problem. The present invention has been made to solve the above problems. An object of the present invention is to provide a linear motor armature capable of improving workability when winding an armature coil around a tooth portion of an armature core and improving the space factor of the armature coil in a slot. And

[0004]

According to a first aspect of the present invention, there is provided an armature for a linear motor, wherein a plurality of permanent magnets constituting a field pole are arranged side by side so that the polarity is alternately different. An armature formed by winding an armature coil around an armature core having a semi-closed slot and facing the permanent magnet row via a magnetic gap, and And one of the armature as a stator and the other as a mover, wherein the armature coil has a number of the teeth, wherein the field pole and the armature run relatively to each other. To N
When (N is an odd number of 3 or more), it is composed of a first armature coil having a number of (N + 1) / 2 and a second armature coil having a number of (N-1) / 2. The first armature coil is wound around the teeth every other one and mounted on the bottom of a slot, and the second armature coil is mounted on the first armature coil. Is wound around the unwound teeth and is mounted on the upper part of the slot. Claim 2
The armature of the described linear motor has a field yoke in which a plurality of permanent magnets constituting a field pole are alternately arranged side by side so that the polarities are different from each other, and the permanent magnet array is opposed to the permanent magnet row via a magnetic gap. An armature formed by winding an armature coil around an armature core having a semi-closed slot, one of the field poles and the armature being a stator, and the other being a mover, In a linear motor in which a field pole and the armature run relatively, when the number of teeth is N (N is an even number of 4 or more), the number of armature coils is N / 2. And a second armature coil having a number of N / 2, and the first armature coil is wound around the teeth every other coil. Is attached to the bottom of the slot It said second armature coil is wound with the wound on the teeth not of the first armature coil, in which is mounted on an upper portion of the slot. By means of the above, as shown in FIG. 1, when winding the armature coil 6 around the laminated armature core 5 having the semi-closed slot 5B, first, the teeth 5A are preliminarily moved from the tip to the root. The wound first armature coils 61, 63, 65, 67, and 69 are wound while being pushed into contact with the bottom side of the slot 5 </ b> B, and then the second wound in advance is wound around the tip end of the tooth 5 </ b> A. Armature coil 6
2, 64, 66, 68 are connected to the first armature coils 61, 6
3, 65, 67, and 69 are sequentially wound while being pushed into the lower side, so that the nozzle portion of the winding machine (not shown) does not contact the first wound armature coil first, and the slot 5B It is possible to reduce the space inside, and as a result, the workability of the winding is improved, and the space factor of the armature coil 6 can be improved.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a side sectional view of a linear motor showing an embodiment of the present invention. Note that, in the present invention, an example of a gap-facing structure having 8 poles and 9 slots is shown as in the prior art, and the same components as those in the prior art are denoted by the same reference numerals, and description thereof is omitted. Only the explanation will be given. The difference between the present invention and the conventional one is as follows. When the number of the teeth 5A is N (N is an odd number of 3 or more), the armature coils 6 have the first armature coils 61, 63, 65, 67, and 69 of (N + 1) / 2.
And a second armature coil 6 having a number of (N-1) / 2
2, 64, 66 and 68.
Of these, the first armature coils 61, 63, 65, 6
Nos. 7 and 69 are wound around the teeth 5A every other one and mounted on the bottom of the slot 5B. Also,
The second armature coils 62, 64, 66, 68 are wound around the unwound teeth 5A of the first armature coils 61, 63, 65, 67, 69, and the slots 5
B is mounted on the upper part. In the case of a linear motor having an even number of teeth N of 4 or more, the armature coils include a first armature coil having a number of N / 2 and a second armature having a number of N / 2. The winding pattern of the armature coil is the same as that in the case where the number N of teeth is an odd number of 3 or more, and a description thereof will be omitted.

Next, the operation of the linear motor will be described. When the armature coil 6 is energized, the armature coil 6
Magnetic flux generated in the teeth 5A constituting the armature core 5
Flows through the permanent magnets 3 facing each other through the magnetic gap, passes through the field yoke 2, and the permanent magnets 3 adjacent to the field yoke 2 again through the magnetic gap. It flows to the core 5. Due to the electromagnetic action of the magnetic flux flowing through the armature core 5 and the magnetic flux of the permanent magnet 3, the armature 4 moves in a linear direction.

Since the embodiment of the present invention has such a configuration, the first armature coils 61, 63, 65, 67, 69
And the second armature coils 62, 64, 66, 68 can be in close contact with each other without creating a gap inside the slot 5 </ b> B, and the space factor of the armature coils in the slot 5 </ b> B is made almost 100%. be able to. Also,
When attaching the first armature coil and the second armature coil to the armature core, first, the first armature coil wound in advance, and then the second armature coil also wound in advance In this case, a so-called winding method is used in which the teeth 5A are wound alternately in the upper and lower two layers in the slot 5B of the armature core. There is no mechanical interference of the armature coil, the insertion can be simplified, and automation and mechanization can be easily performed. In the present embodiment, the armature is used as a mover,
Although the field pole is configured as a stator, the invention is not limited thereto, and the armature may be configured as a stator and the field pole may be configured as a mover. In addition, although the description has been made using the example of the gap-facing linear motor, it is needless to say that the present invention is not limited to this and can also be applied to a magnetic flux penetrating linear motor.

[0008]

As described above, according to the present invention, the first armature coil and the second armature coil can be in close contact with each other without forming a gap inside the slot, The space factor of the armature coil is almost 100
Can be percent. Further, when attaching the first armature coil and the second armature coil to the armature core, first, the first armature coil wound in advance, and then the second armature coil also wound in advance A method of winding so-called teeth every other coil, such as mounting the coils in the upper and lower two layers in the slot 5B of the armature core in order, is performed, so that the first motor coil and the second motor There is no mechanical interference of the child coil, easy insertion,
Automation and mechanization can be easily performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a linear motor showing an embodiment of the present invention.

FIG. 2 is a side sectional view of a conventional linear motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Linear motor 2 Field yoke 3 Permanent magnet 4 Armature 5 Armature core 5A Teeth 5B Slot 6 Armature coil 61, 63 First armature coil (U phase) 62 Second armature coil (U phase) 64 , 66 Second armature coil (V phase) 65 First armature coil (V phase) 67, 69 First armature coil (W phase) 68 Second armature coil (W phase)

Claims (2)

[Claims] 1. A field yoke in which a plurality of permanent magnets constituting a field pole are arranged side by side so that the polarities are alternately different from each other. An armature formed by winding an armature coil around an armature core having a slot, one of the field pole and the armature being a stator, the other being a movable element, and the field pole and the In a linear motor in which an armature relatively travels, when the number of the teeth is N (N is an odd number of 3 or more), the number of the armature coils is (N + 1) / 2. 1 armature coil, and a second armature coil having a number of (N-1) / 2, wherein the first armature coil is wound around the teeth every other coil. At the bottom of the slot An armature for a linear motor, wherein the second armature coil is wound around the teeth on which the first armature coil is not wound, and is mounted above the slot. . 2. A field yoke in which a plurality of permanent magnets constituting a field pole are arranged side by side so as to have alternately different polarities. The field yoke faces a row of the permanent magnets via a magnetic gap, and has a semi-closed shape. An armature formed by winding an armature coil around an armature core having a slot, one of the field pole and the armature being a stator, the other being a movable element, and the field pole and the In a linear motor in which an armature runs relatively, when the number of the teeth is N (N is an even number of 4 or more), the number of the armature coils is N / 2. An armature coil and a second armature coil having a number of N / 2, wherein the first armature coil is wound around the teeth every other coil and a bottom of the slot. The second electric machine Coils, the first with wound around the teeth that are not wound armature coils, armature of the linear motor, characterized in that it is mounted on the upper part of the slot.