JPH0919130A - Dc single-pole linear motor - Google Patents

Abstract

PURPOSE: To provide a low price DC single-pole linear motor in which the stroke is lengthened while reducing the size, weight and cost and fluctuation of thrust is suppressed over the entire stroke by employing a U-shaped stator forming a fixed magnetic circuit. CONSTITUTION: The stator 1 comprises a first permanent magnet 23, a first yoke 21 to be bonded to the N pole face of first magnet 23, and a second yoke 22 to be bonded to the S pole face of first magnet 23, being arranged in U- shape. The mover 11 comprises a third yoke 31 and a first winding 32 being applied around the third yoke 31. The first winding 32 partially faces the first yoke 21 through a first gap Ga and the third yoke 31 partially faces the second yoke 22 through a fourth gap Gd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for driving various moving parts in which various fluctuations of vibration and thrust are disliked in various industrial equipment, various consumer equipment, various OA equipment, etc. The present invention relates to a single-pole linear DC motor that can easily generate a long stroke that enables generation of thrust with little fluctuation with respect to stroke.

[0002]

2. Description of the Related Art Generally, a single-pole linear DC motor is the only linear motor that can generate thrust without pulsation. It is classified into a magnet movable single-pole linear DC motor and a flat coil single-pole linear DC motor.

The basic structure and operation of a conventional single-pole linear DC motor will be described with reference to the sectional views shown in FIGS.

The conventional coil movable single-pole linear DC motor shown in FIG. 1 is composed of a stator 1 and a mover 11. The stator 1 includes a flat plate-shaped yoke 2 and a flat plate-shaped yoke 3 which are arranged to face each other with a predetermined gap.
A yoke 4 fixed to the ends of the yokes 2 and 3 in the direction of arrow B; a yoke 5 fixed to the ends of the yokes 2 and 3 in the direction of arrow A; and a yoke 2 of the yoke 3.
And a permanent magnet 6 in the form of a flat plate to which a magnetic pole surface having a predetermined polarity is fixed. Mover 11
Is mainly composed of a winding wire 12 wound around the yoke 2 with a predetermined gap, and inside the space 15 formed by the relative surfaces of the yoke 2 and the permanent magnet 6 forming the stator 1. , Is arranged in a structure that can move freely in the direction of arrow A or in the direction of arrow B.

The conventional permanent magnet movable single-pole linear DC motor shown in FIG. 2 is composed of a stator 1 and a mover 11. The stator 1 includes a flat plate-shaped yoke 2 and a flat plate-shaped yoke 3 which are arranged to face each other with a predetermined gap therebetween, and a yoke 4 which is fixed to an end of the yoke 2 and the yoke 3 in the arrow B direction. , Yoke 2 and yoke 3 arrow A
A yoke 5 fixed to an end portion in the direction and a winding wire 7 wound around the yoke 2 are mainly configured. The mover 11 is
The stator 1 is configured such that a permanent magnet 13 having a flat plate shape is mainly configured, and a magnetic pole surface having a predetermined polarity faces the winding 7 and a magnetic pole surface having another polarity faces the yoke 3. The winding 7 and the yoke 3 are arranged in a structure capable of smoothly moving in the space 16 formed by the relative surfaces of the winding 7 and the yoke 3.

The conventional flat coil type single pole type linear DC motor shown in FIG. 3 comprises a stator 1 and a mover 11. The stator 1 includes a flat plate-shaped yoke 2 and a flat plate-shaped yoke 3 which are arranged to face each other with a predetermined gap.
And a permanent magnet 8 in the form of a flat plate in which a magnetic pole surface having a predetermined polarity is fixed to a part of the surface of the yoke 2 facing the yoke 3.
And a permanent magnet 9 in the form of a flat plate to which a magnetic pole surface having a different polarity from the magnetic pole surface of the permanent magnet 8 adjacent to another part of the surface of the yoke 2 facing the yoke 3 is fixed. .
The mover 11 is mainly composed of a flat coil 14, and freely moves in a space 17 formed by relative surfaces of the yoke 3 and the permanent magnet 8 and the permanent magnet 9 in the arrow A direction or the arrow B direction. Placed in the structure to get.

In FIG. 1, the permanent magnet 6 constituting the stator 1 is configured such that a magnetic pole surface having an N-pole polarity faces the yoke 2, and a magnetic pole surface having an S-pole polarity is fixed to the yoke 3. To be done. When an electric current is applied to the winding wire 6 which constitutes the mover 11 in the direction shown in the drawing, the mover 11 follows the arrow A according to the Bil's law.
When the coil 6 is moved in the direction and a current is applied to the winding 6 in a direction different from the current, the mover 11 moves in the direction of arrow B.

In FIG. 2, in the permanent magnet 13 constituting the mover 11, the magnetic pole surface having the N-pole polarity faces the winding 7, and the magnetic pole surface having the S-pole polarity faces the yoke 3. Composed. When an electric current is applied to the winding wire 7 forming the stator 1 in the direction shown in the figure, the mover 11 moves in the direction of arrow B according to the Bil's rule, and when an electric current is applied to the winding wire 7 in a direction different from the current, Move in the direction of arrow A.

In FIG. 3, the permanent magnet 8 constituting the stator 1 is configured such that the magnetic pole surface having the polarity of the S pole faces the yoke 3 and the magnetic pole surface having the polarity of the N pole is fixed to the yoke 2. The permanent magnet 9 is configured such that the magnetic pole surface having the N-pole polarity faces the yoke 3, and the magnetic pole surface having the S-pole polarity is fixed to the yoke 2. When an electric current is applied to the flat coil 14 forming the mover 11 in the direction shown in the drawing, Bil
According to the rule, the mover 11 moves in the direction of arrow B, and when a current is passed through the flat coil 14 in a direction different from the above current, the mover 11 is moved.
Moves in the direction of arrow A.

Generally, the single-pole type linear DC motor is the only linear motor which can generate thrust without pulsation, and by mounting various position detecting devices, thrust, speed and stop position can be controlled. And, it is the only linear actuator that can cope with the movement of the load, which is insensitive to the fluctuation of the vibration and the thrust.

The coil-movable single-pole linear DC motor has an advantage that the weight of the mover 11 can be reduced, but on the other hand, it requires a feeder line to move together with the mover 11, and requires a large moving space for the feeder line. There is a problem that a mounting space is required. Further, the magnetic path length fluctuates over the entire stroke, making it difficult to achieve a long stroke. At the time of high current operation, due to the influence of the magnetic field formed by the winding wire 12, Thrust varies greatly over the entire stroke. The permanent magnet movable type single pole type linear DC motor has an advantage that a feeder line is not required to be attached to the mover 11, but has a problem that the thrust is extremely small and practical application is difficult. The single-pole type linear DC motor has an advantage that it is possible to increase thrust, but on the other hand, it requires a length of the stator 1 which is more than twice the stroke, which makes it difficult to achieve a long stroke. is there.

[0012]

The problems to be solved are to make the conventional single-pole type linear DC motor, which generates thrust without pulsation, long stroke, increase thrust, and eliminate thrust fluctuations over the entire stroke. It is difficult to realize that together.

[0013]

In order to solve the above-mentioned problems, a single-pole type linear DC motor of the present invention has a pair of yokes fixed in a U-shape to two magnetic pole faces having different polarities of a permanent magnet. A winding that constitutes a stator or a mover by constructing a stator in a structure in which a closed magnetic circuit is formed through a space formed by the respective relative surfaces of portions of the pair of yokes that directly face each other with a predetermined gap. Attach the yoke to a part of
The magnetic flux formed by the permanent magnets that make up the stator or mover is linked to only part of the windings that make up the stator or mover. And the most important feature is to make uniform regardless of the length of the stator. The objectives of achieving a long stroke, increasing thrust, and eliminating fluctuations in thrust for all strokes have been achieved very easily.

[Detailed Description of the Invention]

FIG. 4 and FIG. 5 are sectional views for the purpose of explaining the operation and structure of the first embodiment of the single pole type linear DC motor of the present invention.

The single pole type linear DC motor of the present invention is arranged in a stator 1 constituting a fixed magnetic circuit and a space constituting a part of the fixed magnetic circuit of the stator 1, and mainly comprises windings. And the movable element 11 to be operated.

The stator 1 is composed of a first permanent magnet 23 in the form of a flat plate, and a first yoke 21 in the form of a flat plate fixed to the magnetic pole surface of the first permanent magnet 23 having the N-pole polarity. First
And the second yoke 22 in the form of a flat plate fixed to the magnetic pole surface of the permanent magnet 23 having the polarity of the S pole. A part of the first yoke 21 and a part of the second yoke 22 are mainly formed. The U-shape is formed so as to directly face each other through the space 41.

The mover 11 has a third yoke 31 in the form of a flat plate having protrusions 36 and 37 at both ends,
The first yoke 21 and the second yoke 21 are provided around the third yoke 31.
First winding 32 wound in a direction parallel to the yoke 22 of
And a part of the first winding 32 is directly opposed to the first yoke 21 with a first gap Ga, and another part of the first winding 32 is a third gap. Second yoke 2 separated by Gc
2, a part of the third yoke 31 faces the first yoke 21 via a part of the first winding 32 across a second gap Gb, and a part of the third yoke 31 The protrusion 36 and the protrusion 37 are arranged in the space 41 formed by the stator 1 so as to directly face the second yoke 22 with the fourth gap Gd therebetween. The first gap Ga is the second gap G
b is smaller than b, and the fourth gap Gd is the third gap G.
It is configured to be smaller than c.

The stator 1 has a first yoke 2 which directly faces the stator 1.
1 and a part of the second yoke 22 form a closed magnetic path through a space 41 formed by the respective relative surfaces. The first yoke 21, the space 41, the third yoke 22, and the magnetic flux Φa shown by the dotted line reaching the magnetic pole surface having the polarity of the S pole are formed.

A part of the magnetic flux Φa in the space 41 interlinks the first winding 32 facing the first yoke 21, and the third yoke 31, the protrusion 36, and the fourth portion in the arrow B direction. Gap G
The other part of the magnetic flux Φa in the space 41 reaches the third yoke 22 via d, links the first winding 32 facing the first yoke 21, and the third yoke 31, The third yoke 2 is provided via the protrusion 37 and the fourth gap Gd in the direction of arrow A.
Reach 2.

That is, the magnetic flux Φa emitted from the magnetic pole surface having the polarity of the N pole of the first permanent magnet 23 is linked only to the first winding 32 facing the first yoke 21, The first winding 32 facing the yoke 22 of the
The protrusion 36 and the protrusion 37 formed by the yoke 31 are bypassed to reach the magnetic pole surface having the polarity of the S pole of the first permanent magnet 23.

When a current is passed through the first winding 23 in the direction shown in the figure, the mover 11 moves in the direction of arrow B with a predetermined thrust, and a current in a direction different from that shown in the figure is passed through the first winding 23. As a result, the mover 11 moves in the direction of arrow A.

6 and 7 are sectional views for the purpose of explaining the operation and the structure of the second embodiment of the single-pole type linear DC motor of the present invention.

The single pole type linear DC motor of the present invention is arranged in a stator 1 which constitutes a fixed magnetic circuit and a space which constitutes a part of the fixed magnetic circuit of the stator 1, and mainly comprises a permanent magnet. And the movable element 11 to be operated.

The stator 1 is composed of a first permanent magnet 23 in the form of a flat plate, and a first yoke 21 in the form of a flat plate fixed to the magnetic pole surface having the polarity of the S pole of the first permanent magnet 23. First
Second yoke 22 in the form of a flat plate fixed to the magnetic pole surface of the permanent magnet 23 having the N pole polarity, and the second yoke 22.
A fourth yoke 24a in the form of a flat plate having protrusions 26a and 27a at both ends that are mechanically and magnetically fixed to the surface of the first yoke 21 facing the first yoke 21, and the fourth yoke 2
4a and a second winding wire 25a wound in a direction parallel to the first and second yokes 21 and 22, mainly a part of the first yoke 21 and a part of the second yoke 22. It is configured in a U shape so that a part of the second winding wire 25a fixed to is directly opposed via the space 41.

The mover 11 is mainly composed of a second permanent magnet 33 in the form of a flat plate, and a magnetic pole surface having a polarity of N pole is opposed to the first yoke 21 with a predetermined gap therebetween. It is arranged in the space 41 so that a magnetic pole surface having the polarity of the S pole faces a part of the winding 25a with a predetermined gap.

The stator 1 has a second winding 2 wound around a fourth yoke 24a mounted on a part of the second yoke 22.
A closed magnetic path is formed through a space 41 formed by the relative surfaces of a part of 5a and a part of the first yoke 21. Second
Magnetic flux reaching the magnetic pole surface having the polarity of the S pole of the yoke 22, the protruding portion 26a, the fourth yoke 24a, the second winding 25a, the space 41, the first yoke 21 and the first permanent magnet 23, The second yoke 22, the protruding portion 27a, and the fourth yoke 2 are formed from the magnetic pole surface of the first permanent magnet 23 having the N-pole polarity.
4a, second winding 25a, space 41, first yoke 21
And the magnetic flux Φa indicated by the dotted line is formed by the magnetic flux reaching the magnetic pole surface having the polarity of the S pole of the first permanent magnet 23. The mover 11 forms a magnetic flux Φb in the closed magnetic path formed by the stator 1 from the magnetic pole surface having the N-pole polarity of the second permanent magnet 33 to the magnetic pole surface having the S-pole polarity.

A part of the magnetic flux Φa in the space 41 is superimposed on the magnetic flux Φb generated by the second permanent magnet 33, and the magnetic flux Φa +.
Becomes Φb, and a part of the second winding 25a facing the second permanent magnet 33 is linked to reach the first yoke 21.

That is, a part of the magnetic flux Φa emitted from the magnetic pole surface having the N-pole polarity of the first permanent magnet 23 does not interlink with the second winding 25a facing the second yoke 22. , The second pole 25a of the first permanent magnet 23, which links the protrusion 26a and the protrusion 27a formed by the fourth yoke 24a, and links only to the second winding 25a facing the first yoke 21. To the magnetic pole surface having the polarity of. The other part of the magnetic flux Φa emitted from the magnetic pole surface having the N pole polarity of the first permanent magnet 23 is changed to the magnetic flux Φb emitted from the magnetic pole surface having the N pole polarity of the second permanent magnet 33. The magnetic flux Φa + Φb is superposed, the portion of the second winding 25a facing the second permanent magnet 33 is interlinked, and the polarity of the S pole of the first permanent magnet 23 is changed via the second permanent magnet 33. To the magnetic pole surface that it has.

By supplying a current to the second winding 25a in the direction shown, the second permanent magnet 33 and the first yoke 2
Bil between a part of the second winding 25a facing 1
According to the law, a force in the direction of arrow B acts on the second permanent magnet 33, and the Bil law is applied between the second permanent magnet 33 and a part of the second winding 25a facing the second yoke 22. Accordingly, the force in the direction of the arrow A acts on the second permanent magnet 33, but the magnetic flux Φa + Φb bypasses the protrusion 26a and the protrusion 27a and chains the second winding 25a facing the second yoke 22. Don't cross

That is, by causing a current to flow through the second winding 25a in the direction shown in the figure, the mover 11 moves in the direction of arrow B with a predetermined thrust, and the second winding 25a receives a current in a direction different from that shown in the figure. The movable element 11 moves in the direction of the arrow A by flowing.

8 and 9 are sectional views for the purpose of explaining the operation and the structure of the third embodiment of the single-pole type linear DC motor of the present invention.

The single pole type linear DC motor of the present invention is arranged in a stator 1 constituting a fixed magnetic circuit and a space constituting a part of the fixed magnetic circuit of the stator 1, and mainly comprises windings. And the movable element 11 to be operated.

The stator 1 has a first permanent magnet 23 in the form of a flat plate, and a first yoke 21 in the form of a flat plate fixed to the magnetic pole surface of the first permanent magnet 23 having the N pole polarity. First
And the second yoke 22 in the form of a flat plate fixed to the magnetic pole surface of the permanent magnet 23 having the polarity of the S pole. A part of the first yoke 21 and a part of the second yoke 22 are mainly formed. The U-shape is formed so as to directly face each other through the space 41.

The mover 11 has a sixth yoke 34 having protrusions 38 and 39 at both ends, and a direction perpendicular to the first yoke 21 and the second yoke around the sixth yoke 34. And the flat coil 35 wound around the sixth yoke 34. The protruding portion 38 of the sixth yoke 34 is directly opposed to the first yoke 21 with a sixth gap Gf therebetween,
Of the second yoke 22 through the eighth gap Gh.
Directly facing the first yoke 21 of the flat coil 35, the portion in the direction of arrow A facing the first yoke 21 of the flat coil 35 directly faces the first yoke 21 with a fifth gap Ge. The opposing portion in the arrow B direction faces the first yoke 21 via the protruding portion 38 across the fifth gap Ge, and the portion of the flat coil 35 in the arrow A direction facing the second yoke 22 is the seventh portion. Part of the flat coil 35 in the direction of arrow B, which faces the second yoke 22 directly with a gap Gg between the second yoke 22 and the second yoke 22. They are arranged in a space 41 formed by the stator so as to face each other.

The stator 1 is composed of a first yoke 2 which directly faces the stator 1.
The first permanent magnet 23 forms a closed magnetic path through a space 41 formed by the relative surfaces of a part of the first yoke 22 and a part of the second yoke 22. The first yoke 21, the space 41, the third yoke 22, and the magnetic flux Φa indicated by the dotted line that reaches the magnetic pole surface having the polarity of the S pole are formed.

A part of the magnetic flux Φa in the space 41 is part of the first winding wire 32 from the first yoke 21 via the fifth gap Ge.
Part of the magnetic flux Φa in the space 41 reaches the second yoke 22 through the seventh gap Gg, and the other part of
From the yoke 21 of the sixth gap Gf, the protruding portion 38, the sixth
The second yoke 22 is reached through the yoke 34, the protrusion 39, and the eighth gap Gh.

That is, the magnetic flux Φa emitted from the magnetic pole surface having the polarity of the N pole of the first permanent magnet 23 is the flat coil 3
5 does not interlink with the portion of the flat coil 35 in the direction of arrow B, and does not interlink with the portion of the flat coil 35 in the direction of arrow B. 1 reaches the magnetic pole surface having the polarity of the S pole of the permanent magnet 23.

When a current is passed through the first winding 23 in the direction shown in the figure, the mover 11 moves in the direction of arrow B with a predetermined thrust, and a current in a direction different from that shown in the figure is passed through the first winding 23. As a result, the mover 11 moves in the direction of arrow A.

FIG. 10 is a sectional view for the purpose of explaining the structure of the fourth embodiment of the single-pole linear DC motor of the present invention.

The single-pole type linear DC motor of the present invention is arranged in a stator 1 constituting a fixed magnetic circuit and a space constituting a part of the fixed magnetic circuit of the stator 1, and mainly comprises a permanent magnet. And the movable element 11 to be operated.

The stator 1 has a first permanent magnet 23 in the form of a flat plate, and a first yoke 21 in the form of a flat plate fixed to the magnetic pole surface of the first permanent magnet 23 having the N-pole polarity. First
Second yoke 22 in the form of a flat plate fixed to the magnetic pole surface of the permanent magnet 23 having the polarity of the S pole, and the second yoke 22.
A fourth yoke 24a in the form of a flat plate having protrusions 26a and 27a at both ends that are mechanically and magnetically fixed to the surface of the first yoke 21 facing the first yoke 21, and the fourth yoke 2
4a, a second winding 25a wound in a direction parallel to the first yoke 21 and the second yoke 22, and a mechanical and magnetic surface of the first yoke 21 relative to the second yoke 22. A flat plate-shaped fourth yoke 24b having projections 26b and projections 27b at both ends fixed to each other, and a direction parallel to the first yoke 21 and the second yoke 22 on the fourth yoke 24b. The second winding 25b to be wound is mainly fixed to a part of the second winding 25a fixed to a part of the second yoke 22 and a part of the first yoke 21. It is configured in a U shape so as to directly face a part of the second winding wire 25b through the space 41.

The mover 11 is mainly composed of a second permanent magnet 33 in the form of a flat plate, and is fixed to the second winding 25b fixed to the first yoke 21 via the fourth yoke 24b. The magnetic pole surfaces having the polarity of the S pole face each other with a gap therebetween, and have the polarity of the N pole with the second winding 25a fixed to the second yoke 22 via the fourth yoke 24a with a predetermined gap. The magnetic pole surfaces are arranged in the space 41 so as to face each other.

Second winding 25a and second winding 25b
By moving an electric current in the direction shown in the figure, the mover 11 moves in the direction of arrow B with a predetermined thrust, and the second winding 25
The mover 11 moves in the direction of arrow A by passing a current in a direction different from that shown in the drawing a and the second winding 25b.

FIG. 11 is a sectional view for the purpose of explaining the structure of the fifth embodiment of the single-pole linear DC motor of the present invention.

The single pole type linear DC motor of the present invention is arranged in a stator 1 which constitutes a fixed magnetic circuit and a space which constitutes a part of the fixed magnetic circuit of the stator 1, and mainly constitutes windings. And the movable element 11 to be operated.

The stator 1 has a first permanent magnet 23 in the form of a flat plate, and a first yoke 21 in the form of a flat plate fixed to the magnetic pole surface of the first permanent magnet 23 having the N pole polarity. First
And the second yoke 22 in the form of a flat plate fixed to the magnetic pole surface of the permanent magnet 23 having the polarity of the S pole. A part of the first yoke 21 and a part of the second yoke 22 are mainly formed. The U-shape is formed so as to directly face each other through the space 41.

The mover 11 has a flat plate-shaped third yoke 31 having projections 36 and 37 on both ends thereof.
The first yoke 21 and the second yoke 21 are provided around the third yoke 31.
First winding 32 wound in a direction parallel to the yoke 22 of
And a part of the first winding 32 is directly opposed to the first yoke 21 with a first gap Ga, and a part of the third yoke 31 is separated with a second gap Gb. The first winding 3
2 and the protruding portion 36 and the protruding portion 37 of the third yoke 31 respectively face the first yoke 21 via a part of
Directly facing the second yoke 22 with a gap Gd of
The other part of the winding 32 of the protrusion 3 is separated by the third gap Gc.
6 is arranged in the space 41 formed by the stator 1 so as to face the second yoke 22 via a part of the protrusion 6 and a part of the protrusion 37.

By supplying a current in the direction shown in the drawing to the first winding 23, the mover 11 moves in the direction of arrow B with a predetermined thrust, and a current in a direction different from that shown in the drawing is supplied to the first winding 23. As a result, the mover 11 moves in the direction of arrow A.

In the single pole type linear DC motor of the present invention shown in FIGS. 4, 5 and 11, the windings are used as the mover in the same manner as the conventional moving coil type single pole type linear DC motor shown in FIG. It is a linear DC motor, and the response of the mover decreases as the mass of the mover 11 increases, but it has the advantages of enabling longer strokes, greater thrust, and generation of thrust without fluctuation.

The single pole type linear DC motor of the present invention shown in FIGS. 6, 5 and 10 uses a permanent magnet as a mover similarly to the conventional permanent magnet movable type single pole type linear DC motor shown in FIG. It is a linear DC motor. The conventional permanent magnet movable single-pole linear DC motor has an advantage that it does not require the movement of the power supply line, but it makes it difficult to generate thrust that can be put to practical use. According to the single-pole type linear DC motor of the present invention, a long stroke and a large thrust can be achieved, and further, the windings constituting the stator are formed by arranging windings having a predetermined length in a row. By doing so, it is possible to manufacture a single-pole linear DC motor with an extremely long stroke.

The single-pole linear DC motor of the present invention shown in FIGS. 8 and 9 is a linear DC motor having a flat coil as a mover, like the conventional flat-coil single-pole linear DC motor shown in FIG. Is. In the conventional flat coil type single-pole linear DC motor, the length in the moving direction of the flat coil that constitutes the mover becomes longer as the stroke increases.
This increases the size and weight of the mover, making it difficult to put a long stroke into practical use. According to the single-pole linear DC motor of the present invention, it is possible to achieve a long stroke and reduce the size and weight of the mover.

In general, the first permanent magnet 23 constituting the stator 1 of the single-pole linear DC motor of the present invention has a plurality of permanent magnet pieces which are the same for reasons of manufacture, magnetization, assembly and price. The magnetic pole surfaces having the polarity of are fixedly attached so as to be adjacent to each other.

However, in order to increase the stroke, reduce the cost, and simplify the assembly, a plurality of permanent magnet pieces are arranged in a row at a predetermined interval, and a part of the first yoke 21 and the second yoke are formed. Considering the volume of the permanent magnet and the thicknesses of the first yoke 21 and the second yoke 22, the plurality of permanent magnet pieces are arranged in a row through a non-magnetic material having a predetermined width. Can be configured as follows.

In the embodiment of the present invention shown in FIGS. 4, 5, 6, 7 and 11, the third yoke 33, the protrusion 36 and the protrusion 37, the sixth yoke 34 and the protrusion 3 are provided.
8 and the protrusion 39 cause the magnetic flux Φa interlinking with a part of the first winding 32 or a part of the flat coil 35 forming the mover 11 to be bypassed, and a part of the first winding 32 is provided. Alternatively, it is mounted for the purpose of eliminating the generation of thrust acting on a part of the flat coil 35, and can take various forms depending on the thrust characteristics of the single-pole linear DC motor of the present invention. .

Generally, in the embodiment of the present invention shown in FIGS. 6, 7 and 10, the second winding 25a or the second winding 25b constituting the stator 1 is small and lightweight, and the assembly is simple. In consideration of cost reduction and price reduction, the fourth yoke 2
4a or the fourth yoke 24b, a plurality of windings are wound around the fourth yoke 24a, the fourth yoke 24a, the second winding 25a, and the protrusions for the purpose of improving the mechanical strength when the stroke is increased. A predetermined number of rows of a portion formed by the portion 26a and the protruding portion 27a or a portion formed by the fourth yoke 24a, the second winding 25a, the protruding portion 26a, and the protruding portion 27a are arranged. In particular, the fourth yoke 24a and the fourth yoke 24b can be thinned.

In the single pole type linear DC motor of the present invention shown in FIGS. 4 to 11, the first yoke 21, the second yoke 22, the third yoke 31, the fourth yoke 24a, 2 are provided.
4b, the sixth yoke 34, the protrusions 26a, 26b, 27.
a, 27b, 36, 37 are made of magnetic metal such as electromagnetic soft iron, structural rolled steel, or carbon steel, and have a first winding 32 and a second winding 25a25, 25a, 25.
b, the flat coil 35 is formed by winding a predetermined number of strands of wire having a predetermined diameter on a winding frame, and is formed of a self-bonding wire in order to reduce the size and weight.

In the single pole type linear DC motor of the present invention shown in FIGS. 4 to 11, the space 41 has the first yoke 21 and the second yoke 21 fixed to the magnetic pole faces of the first permanent magnet 23 having different polarities. Of the first yoke 21 and the second yoke 22 that are directly opposed to each other are formed to be equal to the distance between the magnetic poles of the first permanent magnet 23. . Normal,
The distance between the magnetic poles of the first permanent magnets 23 directly opposes the first yoke 21 for the purpose of cost reduction and size and weight reduction.
Also, the first permanent magnet 23 is set to be smaller than the opposing distance between the second yoke 22 and a part of the first permanent magnet 23 is replaced with a member made of a magnetic material or the first yoke 21 or a part of the second yoke 22. Composed

[0058]

As described above, the single pole type linear DC motor of the present invention has a pulsation-free thrust and a thrust that does not fluctuate with respect to the entire stroke, which were difficult to manufacture by the conventional single-pole type linear DC motor. It enables a long stroke of a single-pole type linear DC motor that generates a noise, and has the following advantages. (1) By forming the magnetic path of the stator at right angles to the moving direction of the mover, the magnetic path length can be shortened and the magnetic path length can be made uniform, resulting in a long stroke and a stator Realize downsizing and weight reduction. (2) With the equalization of the magnetic path length of all strokes, the magnetic flux interlinking the windings involved in the generation of thrust is equalized. (3) As the magnetic flux is made uniform, the thrust can be made uniform over all strokes, and the generation of thrust that does not fluctuate over all strokes is realized. (4) With the shortening of the magnetic path length, the leakage magnetic flux is reduced, and the size and weight of the permanent magnet that constitutes the stator can be reduced. (5) Higher magnetic flux density operation becomes possible as the leakage flux decreases, and power consumption can be saved for the same thrust. (6) Achieves greater thrust, smaller size and lighter weight, and lower cost when adapting to short strokes. (7) Even when the current is increased, it is possible to generate thrust without fluctuation over the entire stroke. (8) It is possible to reduce the size and weight of the stator and increase the thrust with the increase in the current.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional single-pole coil movable linear DC motor.

FIG. 2 is a cross-sectional view of a conventional single-pole permanent magnet movable linear DC motor.

FIG. 3 is a cross-sectional view of a conventional single-pole flat coil linear DC motor.

FIG. 4 is a sectional view of a first embodiment of a single-pole linear DC motor of the present invention.

FIG. 5 is another cross-sectional view of the first embodiment of the single-pole linear DC motor of the present invention.

FIG. 6 is a sectional view of a second embodiment of the single-pole linear DC motor of the present invention.

FIG. 7 is another cross-sectional view of the second embodiment of the single-pole linear DC motor of the present invention.

FIG. 8 is a sectional view of a third embodiment of the single-pole linear DC motor of the present invention.

FIG. 9 is another sectional view of the third embodiment of the single-pole type linear DC motor of the present invention.

FIG. 10 is a sectional view of a fourth embodiment of a single-pole linear DC motor of the present invention.

FIG. 11 is a sectional view of a fifth embodiment of a single-pole linear DC motor of the present invention.

[Explanation of symbols]

 1 Stator 2 Yoke 3 Yoke 4 Yoke 5 Yoke 6 Permanent Magnet 7 Winding 8 Permanent Magnet 9 Permanent Magnet 11 Mover 12 Winding 13 Permanent Magnet 14 Flat Coil 15 Space 16 Space 17 Space 21 First Yoke 22 Second Yoke 23 First permanent magnet 24a Fourth yoke 24b Fourth yoke 25a Second winding 25a 25b Second winding 25a 26a Projection portion 26b Projection portion 27a Projection portion 27b Projection portion 31 Third yoke 32 Second Winding 1 33 Second permanent magnet 34 Sixth yoke 35 Flat coil 38 Projection 39 Projection 41 Space

Claims (5)

[Claims] 1. A U-shape comprising at least one or more first permanent magnets, and a first yoke and a second yoke fixed to two magnetic pole faces having different polarities of the first permanent magnet, respectively. And a stator that forms a closed magnetic path through a space formed by respective relative surfaces of a portion where the first yoke and the second yoke directly face each other with a predetermined gap therebetween, A part of the winding directly faces the first yoke with a first gap, and a part of the third yoke has a second gap with a part of the first winding interposed therebetween. The other part of the first winding faces the second yoke directly with a third gap, and the other part of the third yoke has a fourth gap with a second gap. The third yoke is disposed in the space formed by the stator so as to directly face the yoke, and the first yoke is provided on the third yoke. And a movable element composed of a second winding and a first winding wound in a direction parallel to the second yoke, and the fourth gap is smaller than the third gap. Pole type linear DC motor. 2. The mover according to claim 1, wherein a part of the first winding directly faces the first yoke with a first gap, and a part of the third yoke has a second gap. The first yoke is spaced apart to face the first yoke via a part of the first winding, and the other portion of the third yoke is directly facing to the second yoke via a fourth gap.
Is arranged in the space formed by the stator, wherein the other part of the winding of the second coil is opposed to the second yoke through the other part of the third yoke with a third gap. The single-pole linear DC motor according to claim 1, wherein 3. The mover according to claim 1, a sixth yoke,
A flat coil wound around the sixth yoke in a direction perpendicular to the first yoke and the second yoke is mainly configured, and a part of the sixth yoke is separated by a sixth gap. Directly opposite to the other part of the sixth yoke with the eighth gap between them and the second part.
Part of the portion of the flat coil that faces the first yoke directly faces the first yoke of the flat coil and that of the flat coil that faces the first yoke of the flat coil. Part of the flat coil is opposed to the first yoke via a part of the sixth yoke, and a part of a part of the flat coil facing the second yoke is part of a seventh gap. The other part of the portion of the flat coil that faces the second yoke directly faces the second yoke, and the other part of the part of the flat coil faces the first yoke via the other part of the sixth yoke. 2. Arranged in a space formed by the stator so as to face each other.
Single-pole linear DC motor. 4. A U-shape comprising at least one or more first permanent magnets, and a first yoke and a second yoke that are respectively fixed to two magnetic pole surfaces of the first permanent magnet having different polarities. Forming a closed magnetic path through the spaces formed by the respective relative surfaces of the portions where the first yoke and the second yoke directly face each other with a predetermined gap therebetween, and form the space. On the surface of the second yoke relative to the first yoke, at least one fourth yoke in which the second winding is wound in a direction parallel to the first yoke and the second yoke is mechanically and A stator that is magnetically fixed,
The stator is formed so that the magnetic pole surface having a predetermined polarity faces the first yoke with a predetermined gap and the magnetic pole surface having another polarity faces the second winding with a predetermined gap. A single pole type linear DC motor comprising a mover made of a second permanent magnet arranged in the space. 5. The stator according to claim 4, wherein another second winding is provided on a surface of the first yoke forming the space and facing the second yoke. At least one or more other fourth yokes wound in a parallel direction are mechanically and magnetically fixed to each other, and a magnetic pole surface having a predetermined polarity faces the second winding with a predetermined gap therebetween, 5. The single pole according to claim 4, wherein the second permanent magnet constituting the mover is arranged so that magnetic pole surfaces having other polarities face the other second windings with a predetermined gap. Type linear DC motor.