JPS60162472A - Efficient dc linear motor - Google Patents

Abstract

PURPOSE:To improve the efficiency by vertically bending a conductor unit which does not contribute the thrust of an armature coil, displacing other armature coil group at a suitable interval, superposing and disposing the group, thereby forming the thickness in that corresponding to one armature coil. CONSTITUTION:A movable coil type DC linear motor LM is composed by securing a stator yoke 2 onto a base 1 and bonding fixedly a field magnet 6 thereon. A movable magnetic yoke 7 is provided oppositely to the magnet 6, a movable roller 8 is guided by the yoke 2 and moved. When the armature coil 3 of the yoke 7 is superposed and disposed, a conductor unit 3b which does not contribute to the thrust is bent perpendicularly to the magnet 6 side direction so that the conductor units 3a, 3b' are not superposed in double at the superposing time.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a DC linear motor with good efficiency.

(Technical background) Conventionally, most of the linear motors found in many products are linear pulse motors.However.

Such linear pulse motors require significant machining precision, and performance beyond a certain level cannot be expected. Furthermore, it is expensive and has the drawback of causing a step-out phenomenon if it is formed at a low cost.

However, as the linear motor, a DC linear motor is more desirable.

However, most conventional DC linear motors are of the voice coil type, which are used in the linear tracking arms of record players and video discs. In order to solve the drawback of not being able to obtain a complex and short stroke force, it is necessary to attach a field magnet that alternates between N and S magnets, and to use two or more driving forces. An electron coil 7η is arranged opposite to the field magnet,
The above drawbacks can be overcome by providing a direct current linear system in which either the field magnet or the armature coil group is used as a mover and the other is used as a stator.

Here, in order to obtain even stronger thrust, it is recommended to arrange the armature coils in double layers.If the armature coils are arranged in double layers, the lower and lower armature coils should be arranged in the moving direction of the mover. By shifting the phases from each other, a DC linear motor with smooth thrust ripple can be obtained. Therefore, it is desirable to arrange the Koino C in the upper and lower stages with a phase shift.

However, if the armature coils are arranged in duplicate, the magnetic gap becomes large and a large thrust force cannot be obtained.

For this purpose, as shown in FIGS. 3 and 4 of JP-A No. 57-52368, the armature coil is formed with a curved cross section, and the two coils are shifted by half a pitch to fill the space inside each other. Fit one side of the other coil part to the
Even if the armature coils are arranged in an overlapping manner, the armature coil group has a double thickness, so the case where the armature coils are arranged in an overlapping manner is compared to the case where the armature coils are not overlapped.

The magnetic gap becomes larger and larger thrust cannot be obtained. Furthermore, the method disclosed in Japanese Patent Laid-Open No. 57-52368 has the disadvantage that a narrow DC linear motor cannot be obtained.

(Objective of the present invention) The present invention is a DC linear motor that has been developed in consideration of the above circumstances and is lightweight, inexpensive, and has two electric resistor coils superimposed on each other in order to produce large thrust and smooth thrust ripple. Even if the armature coil is installed in a mold, it will only have the same thickness as a single armature coil, and by not increasing the magnetic gap, the magnetic flux density will be increased, resulting in high efficiency, a large thrust, and the ability to move the running element at high speed. .

Allows the traveler to move over long strokes,
This was developed with the aim of obtaining a highly efficient DC linear motor that can be formed at low cost, has a simple structure, is easy to assemble, can be produced at low cost, and has a width of 17°C.

(Means for Coupling the Purposes of the Present Invention) The object of the present invention is to construct a field magnet (j) with magnetic poles of N and S, and an armature coil 1 for driving 2 and 1.
Place one piece opposite to the L field magnet.

In a DC linear motor characterized in that one of the field magnets or the armature coil group is used as a mover and the other is a stator, at least one of the armature coils is The conductor portion that does not contribute to the thrust is bent approximately perpendicularly to the field magnet direction or the opposite direction, and the bent portion is formed by connecting the W4A child coil and one or more armature coil groups. The thrust of one or more armature coil groups can be reduced by superimposing the conductors at appropriate intervals along the direction of movement of the mover to reduce the thrust of one or more armature coil groups. By arranging it at a position between the conductor parts that contribute to the bending part, the conductor parts that contribute to the 1 m force between the armature coil that shifts the bent part and one or more other armature coil groups are doubled or more. This can be achieved by providing a DC linear motor with good efficiency, which is characterized in that it is constructed to have a thickness equivalent to one coil so as not to overlap.

Hereinafter, the first i (dynamic magnet type direct h) and t linear LM' of the present invention will be explained with reference to FIGS. 1 to 6.

(First Embodiment) Figure 4'51 is a top view of the r+J moving coil type straight i'iIC'J near motor LM, Figure 2 is a side view of Figure 1, and Figure 3 is the side view of Figure 1.

FIG. 2 is a vertical cross-sectional view of the one shown in FIGS.

Figure 4 is: 'UibS, a perspective view without showing the shape of the child coil;
Fig. 5 is a perspective view of two armature coils arranged in a superimposed manner with the phases smoothed, Fig. 6 is a plan view of Fig. It is a developed view of a fill group and a field magnet.

Moving coil type DC linear motor L according to the first embodiment of the present invention,
M is a long plate-shaped stator yoke 2 which is narrower than the width of the nucleating agent tt1, fixed on a long plate-shaped core base 1, and a N, SO) magnet 4 as shown in FIG. A field magnet 6 with a large number of U's alternately attached and fixed thereon. Can the field magnet 6 be formed integrally? In order to form it at low cost, a field magnet segment is used, and N
It is preferable to form tM and SfM alternately. A running magnetic yoke 7 having a U-shaped cross section and facing the field magnet 6.
is established.

It is possible to move smoothly in the direction of travel by being guided by the section. On the inner surface of the magnetic yoke 7, one, for example, six armature coils 3 (see FIG. 4) are fixedly arranged in a superimposed manner as described later. armature coil 6
As shown in FIG. 4, a one-position detection element 5 (for example, a Hall element, a Hall element, A magneto-electric conversion element such as an IC) is disposed by soldering. Is the above armature coil 6 used for thrust? The opening angle between the conductor parts 6a and 3a' given by j- is
The opening angle width is substantially an odd number multiple of the magnetic pole width of the field magnet 6, and in this embodiment, the opening angle width is approximately equal to the magnetic pole width of the field magnet 6. The conductor portions 6b that do not contribute to the thrust of the armature coil 6 are j, l, !, as shown in FIGS. 3 to 5. It is bent approximately perpendicularly to the side surface direction of the magnet 6. By the way, if the position detection element 5 is placed at the above position i6, the DC linear motor LM with smooth thrust (torque) ripple 2 will be obtained. ! It is desirable that the position sensing element 5 can be arranged in a suitable position (I:J), which is convenient in mass production. It is possible to install the positioning circuit 11 and the circuit board 5 via the printed circuit board 4 at the position where the semiconductor assembly 1 is installed and the output of the appropriate signal to the (drive circuit) 16 is 7a. This is because the width of the field magnet O can be narrowed by the coil width of the conductor portion 6b that does not contribute Mf to the 1lli force of the R child coil O.

Therefore, there will be a space in which the six armatures 5 can be placed on the side of the subject consisting of 6 groups of armature coils 7J) facing the side surface of the field magnet 6. The 6 groups of coils are 2 as shown in FIG.
The Zunawara armature coil 6 is formed by bending two conductor parts 3b that do not contribute to the thrust approximately perpendicularly, as shown in Fig. 4. As shown in FIG. In other words, along the longitudinal direction, 2WA is applied only to half the width of the electric Ti & child coil.
By arranging the armature coils 6-1 and 6-2 out of phase with each other, the conductor portion 3a7il which contributes to the thrust of the armature coil 6-2 - contributes to the thrust of the armature coil 6-1. By disposing the conductors flIS3a and 3a/.

The armature coils 6-1 and 6-2 are arranged in a superimposed manner so that the rods contributing to the thrust of the armature coils 3-1 and 6-2 do not overlap each other more than twice. death,
As in the case of one armature coil, the magnetic gap is narrowed by forming the conductor portion 6a*6" thick, which contributes to thrust. As shown in FIG. A set of armatures formed by superimposing child coils 5-1 and 3-2.

Three sets of armatures are used, and the three sets of armatures are arranged on the magnetic yoke 7 so as not to overlap each other.

The arrangement example of the armature coil 6 in Example 46 of L is particularly convenient for forming a two-phase DC linear Tanabata with +fu. The method of arranging such an electron coil group is i1
It is also applicable to the dynamic magnet type DC linear motor M'.

The 6th ig+ has 6 electrics (parishion fill 6-1..., 6
-6 and a developed view of the field magnet 6. Six armatures 6-1. . . , 6-6 are arranged at equal intervals from each other, and the armature coils 6-1 and 5-2 . ．． 15-3 and 3-4
．． 3-5 and 6-6 are arranged in an overlapping manner. For position detection, a child 5 is disposed at a position facing the conductor portion 3a that contributes to the thrust of each group of armature coils 3. Therefore, assuming that the moving coil type DC linear motor LM is powered on. As shown in Fig. 6, a current flows in the direction of the arrow F in the electric current forming the armature (rotor coils 1, . . . , 6-6), and a thrust in the direction of the arrow F is obtained. The traveling magnetic yoke 7 that carries the armature coil groups 1, . . . , 6-6 moves in the direction of arrow F. Note that each type of armature coil 6-1, . . . , 6-6 group Both terminals of 14-1. are connected to a semi-semiconductor rectifier 16, and a re-output terminal of the 1-position detection element 5 is connected to a semiconductor rectifier 13.14-1.
14-2 are positive power terminals of the semiconductor rectifier 16, respectively.

This is the negative power terminal. As is clear from Figure 6,
The armature coil 6 is approximately equal to the magnetic pole width of the field magnet 6, and each type (three groups of round coils) are arranged so as not to overlap each other.

Therefore, when each type (C'j'-E) detects the N and S magnetic poles of the field magnet 6, the element Based on the signal from 5.

By the semiconductor rectifier 16, the armature coil 3
-1. . . , as described above in 6-6, a current 1a is passed in a predetermined direction, and the magnetic yoke 7 that drives the field magnet 6 can be caused to run in a predetermined direction.

(Second embodiment) Fig. 7 is a top view of the i-dynamic magnet type DC motor LM', Fig. 81J is a side view of Fig. 7, and Fig. 9 is the one shown in Figs. 7 and 8. FIG. 10 is a plan view of an armature including one set of 311ISI armature coils, and FIG. 11 is a developed view of the field magnet 6 and three groups of armature coils.

The movable magnet type DC linear motor LM' according to the second embodiment of the present invention is the same as the DC linear motor LM according to the first embodiment.
The structure is almost the same, with three groups of armature coils arranged on the stator yoke 2 side, and a length < N on the magnetic yoke 7 side.
A 4-pole field magnet 6 with magnetic poles of , S alternately a is fixedly installed, an armature consisting of 6 groups of armature coils is used as a stator, and the field magnet 6 side is moved in the running direction. There is. The arrangement conditions for the position sensing element 5 are the same as in the first embodiment. In this embodiment, as shown in FIG. 10, a 31 flA electronic paper coil 6-1. ..., 6-
Multiple sets of armatures with 3 in one set, L stator yoke 2
It is placed on the surface. Three armature coils 3-1. ...
, 6-6 have the shape shown in FIG. 4, and include three armature coils 3-1. . . , 6-3 are sequentially arranged in a T-shape along the movement direction of the mover by one-third the width of the armature coil. Therefore, the rod portion 6a that contributes to the thrust of the armature coil 6-2 can be disposed between the conductor portions 6a and 3a/ that contribute to the thrust of the armature coil 3-1. The conductor tlH53a' contributing to the thrust force is connected to the conductor portions 6a and 6a/6a contributing to the thrust force of the armature coil 3-2.
The conductor portion 3a/, which contributes to the thrust of the armature coil 3-2, can be placed between the conductor portions 3a and 5a/, which contribute to the thrust of the armature coil 6-3. The conductor portion 6a that contributes to the thrust of the armature coil 3-3 is placed between the conductor portions 3a and 3a' that contribute to the thrust of the armature coil 6-2 6'L.
Placed in In this way, armature coils 3-1 and 5-
2. Even in the arrangement b1 type in which 5-2 and 6-6 are overlapped, the two armature coils do not overlap more than twice. In other words, the conductor portion 5a does not contribute to the thrust of the two electron α-coils.
, 3a' groups do not weigh each other, so even if the armature coils are stacked on top of each other, the electric (rotor coil 6-1...
・, stator rU, f:; A child consisting of 3-6 groups is 71
The thickness is only one child coil, and the magnetic air gap density can be increased.

A highly efficient DC linear motor LM' can be obtained.

Also, since the armature coils are arranged out of phase,
DC linear motors I, M' with smooth thrust ripples can be obtained.

Furthermore, the arrangement of the first and second coils is as shown in Figure 10.

In order to obtain -7 from the 3-way DC linear (for R, but not limited to 3-phase), the developed diagram in Figure 11 is the same as the principle shown in Figure 6, so let's explain it. In addition, in the case of the movable magnet type DC linear motor LM', which has the same other components and operations, the power cord 18 (Fig. 2) etc. is omitted compared to the moving coil type linear motor LM. Although it has the advantage of not involving movement,
Since the moving coil type is light in weight, it can be easily driven with a light force and can be mass-produced at low cost.

Notes 7rL6. =The child coil 6 may be formed by winding a core wire, or may be a printed coil using printed wiring technology. The spirit of the present invention also applies to skew magnetization of the magnetic poles of the field magnet 2, or skew magnetization of the 2-piece body 1'(1', 5a that contributes to the armature coil 6). Therefore, it is of course applicable.

(Effects) As mentioned above, the DC linear motor of the present invention eliminates the drawbacks of the linear pulse generator and the conventional f-swivel type DC linear motor, and therefore differs from the conventional DC linear motor. The armature coils are arranged in a superimposed manner, and the phase of the armature coils in the upper and lower stages is shifted, resulting in a smooth thrust ripple. Since the thickness is only one inch thick and the magnetic gap density can be increased, strong thrust can be obtained, high efficiency, and long stroke DC linear [
- It is possible to form a tanabata, and if it is coreless, no coking occurs and the configuration is extremely simple, so it is easy to assemble, can be mass-produced at low cost, and brings to the world the narrow width DC linear Tanabata with good efficiency. fr the effects that can be provided. Incidentally, it is of course possible that the body part which does not contribute to the above-mentioned thrust force may be bent in the opposite direction to the field magnet.

[Brief explanation of the drawing]

FIG. 1 is a top view of a moving coil type i+iε linear motor according to a first embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. Fig. 3 is a longitudinal cross-sectional view of the one in Figs. 1 and 2 as seen from the running direction, Fig. 4 is a perspective view showing the arrangement of the position forming elements and the shape of the electric dot coil, and the fifth case is 2 Figure 6 is a perspective view of an armature in which several armature coils are arranged in a superimposed manner. FIG. 7 is a top view of the flexible magnet type direct current near e-tube according to the second embodiment of the present invention, FIG. 8 is a side view of FIG. 7, and FIG. Fig. 9 is a longitudinal cross-sectional view of the one shown in Figs. 7 and 8 as seen from the running direction IJ), and Fig. 10 is a plan view of an armature with three armature coils arranged in a stacked configuration. is a developed diagram of the field (a) and the armature coil.LfVl...moving coil type DC linear motor.LM'...ljJ magnet type DC linear motor,
6...ton); Yako coil, 5...&1 neck detector, 6...field magnet, 7...travel Gy-, note body yoke, 16...half fan body Rectifier. Figure 2 ( Figure 3

Claims (1)

[Scope of Claims] A DC linear motor characterized in that either the magnet throat or the armature coil group is used as a mover, and the other is used as a stator, in which at least one of the armature coils is used as a stator.
The armature coil is formed by bending a conductor portion that does not contribute to the thrust approximately perpendicularly to the direction of the field magnet or the opposite direction, and the armature coil and other The child coil group is shifted at an appropriate interval I along the moving direction of the mover.
A conductor part that contributes to the thrust of the armature coil is arranged in a position between the conductor parts that contribute to the thrust of one or more other armature coil groups. By doing so, the conductor BIS that contributes to the thrust of the armature coil H at the bent portion and one or more other armature coil groups is prevented from overlapping more than twice. A highly efficient DC linear motor characterized by having a thick structure. 2. The conductor portion that does not contribute to the thrust is formed by bending in the direction of the field magnet. A DC linear motor with good efficiency. 3. The armature coil has an opening angle width of the conductor part that contributes to the thrust. 3. A highly efficient DC linear motor according to claim 1 or 2, characterized in that the motor is formed by: