JPS58182468A - Magnetic-mechanical actuator - Google Patents

Abstract

PURPOSE:To give parametric oscillatory characteristics, and to increase starting torque by moving hard and soft magnetic materials and a conductive metallic body on the end surface of a U-shaped core. CONSTITUTION:Both legs of the U-shaped cores 1, 2 of the magnetic materials are assembled so as to be joined mutually centering around a cylindrical core 3 of a magnetic material. Primary winding 4 is wound on the core 1, and AC power supplies of single phase are connected at both terminals of the winding. On the other hand, secondary winding 5 is wound on the core 2, and a resonant capacitor 6 is connected and a magnetic-field generating element is constituted. When a plurality of the elements are arranged in the direction of progress while using the element as a unit and single-phase AC power is inputted to the primary winding 4, a vehicular body consisting of the magnetic material, etc. is moved on the end surfaces of the U-shaped cores 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to linear motors, and more particularly to magneto-mechanical actuators that utilize nonorametric oscillation.

Murakami, one of the inventors of the present invention, wrote in Japanese Patent Application Laid-Open No. 55-144769: A rigid motor having a sarametric oscillation characteristic has the advantage that it has an extremely simple structure and is easy to manufacture.

Furthermore, the present inventors have announced a motor with a structure as shown in FIG. 1 as a modification of this motor.

(IEEJ Magnetics Study Group Material MAG82-20
(January 1982) In Fig. 1, U-shaped magnetic cores A and tA2 are magnetic paths for excitation, and are arranged spatially shifted by 90', and the cross section of the core A l + A 2 is are respectively joined to the lower surface of the annular common magnetic path B.

The windings that were wound around these cores A 1 r A 2 and inserted as shown in the figure are the primary winding N and the secondary winding N.
2, connect the single-phase power supply voltage El to the N1 winding terminal,
Connect the resonance capacitor C to the N2 winding terminal.

When a single-phase AC power source is connected to the input winding N of this device,
A rotating magnetic field is generated in the annular magnetic core B, and the room rotor and the
By arranging the aluminum disc or magnetic disc shown in b), the motor operates as a base ramometric induction motor, and the rotor and disc rotate.

The present invention was based on the above-mentioned principle, and was inspired by the fact that if the annular common magnetic path B is cut and made into a rod shape, a near motor capable of moving in a straight line can be obtained.

The present invention has a rod-shaped core made of a magnetic material, and a U-shaped core made of a magnetic material on both sides of the rod-shaped core, and the U-shaped core made of a magnetic material is shifted so that the rod-shaped core and the U-shaped core are in contact with both sides of each U-shape.
In addition, one leg of the U-shaped core is provided with an input primary winding, and the other core leg is provided with a secondary winding, and this secondary winding is used for resonance. A capacitor is connected to constitute a magnetic field generating element, a plurality of these elements are arranged in the traveling direction as a unit, single-phase AC power is input to the primary winding, and the end surface of the U-shaped core is hardened.

The present invention relates to a magneto-mechanical actuator characterized in that a soft magnetic material or a conductive metal material is moved.

Next, the present invention will be explained using the drawings.

FIG. 2 shows one element of a magnetic field generating device for explaining the present invention, and FIGS. 2(a), 2(b), and 2(c) are a front view, a side view, and a plan view, respectively.

First, U-shaped cores 1 and 2 made of a magnetic material such as a silicon steel plate or ferrite are prepared, and a rod-shaped core 3 made of the same magnetic material is prepared.
and 20.Assemble so that both legs are joined. Cores 1 and 2 are arranged so as to be offset by a distance Δt as shown in Figure (C). A primary winding 4 is wound around the core 1, and both terminals thereof are connected to a single-phase AC power source. On the other hand, a secondary winding 5 is provided on the core 2, and a resonant capacitor 6 is further connected thereto.

Furthermore, the position of the rod-shaped core 3 that constitutes the common magnetic path is as follows.

Although it may be the same as the end face of the U-shaped core, it is more preferable to install it a distance d lower as shown in Figure (a) in order to increase the leakage magnetic flux at the end face of the U-shaped core to some extent.

When the element shown in Fig. 2 is fixed and the primary voltage E1 is applied, and a gramometric oscillation is occurring, when a magnetic plate is placed on the J: surface, the secondary voltage E2 is E! It was confirmed that the plate is moved to the left or right by advancing or delaying by 90 degrees.

This phenomenon indicates that the elements of the cores 1 and 2 are oscillating lametrically and that an alternating current traveling magnetic field is generated between the magnetic poles.

In this case, if you disconnect the secondary side capacitor, para-
The oscillation stops and the magnetic plate is no longer transferred, and this fact also means that the deviation of cores 1 and 2 (distance Δ
This can be seen from the fact that when t) completely disappears, IJT oscillation stops and the metal plate is not transferred.

FIG. 3 shows the elements of FIG. 2 as electrical connection symbols. PC' represents such a core combination.

FIG. 4 shows a plurality of elements shown in FIG. 2 arranged in a straight line. However, the primary and secondary windings are electrically connected as shown in FIG. 5 for the sake of explanation.

In the experiment, a roller 9 was placed on the rail 8 as shown in Fig. 6.
is attached and the magnetic plate 7 is placed.

By changing the polarity of E2 with respect to El, I was able to make it run in the right direction.

The basic structure of the present invention and its operating principle have been explained above, but in the present invention, the force and speed of the moving object are adjusted by
This can be done by adjusting the value of the voltage input to the primary winding and varying the frequency of the power supply, or by changing the distance between one element and the next element. It is also possible to insert a variable resistor in parallel to the capacitor of the secondary circuit to a degree that does not stop the 74-ram metric oscillation, and change this value to change the speed of the traveling magnetic field. Also, in the above explanation,
Although the magnetic field generating element is used as a stator and the magnetic plate is moved, it is also possible to use a fixed long magnetic plate and use the element as a moving body.

Further, in the above description, the movable body is made of a magnetic plate, but it may be made of a highly conductive material such as an aluminum plate, or a combination of both, although the force is somewhat smaller.

FIG. 7 shows another embodiment of the invention. This figure shows the elements shown in Figure 2 arranged symmetrically and in parallel with respect to the X direction, with primary windings on U-shaped cores 1 and 1' and secondary windings on cores 2 and 2'. It is strained. With only one element, the vector of force F1 will have some component force fy acting in the Y direction, but when two elements are arranged in parallel like this.

The component forces in the Y direction are canceled out, and only the component force in the X direction is even larger, making it possible to obtain a larger force.

FIG. 8 shows an apparatus having a function of attenuating or stopping the speed of a moving object being transported.

This function also allows transport in the original direction.

In FIG. 8, the case of four elements will be explained. Basically, the configuration is the same as that in FIG. 2.

Each element is numbered 1 to 4. Up to AI"□A3, the power fxl from these has exactly the same configuration.

fX21 and fx3 are respectively facing left. In A4, a U-shaped core 1' with a primary winding is arranged near the element A3 using a common rod-shaped core 3' as a groove, and a U-shaped core with a secondary winding is arranged. 2' is arranged on the left side, shifted from the core 1'. In this way, leaving core 3′ as it is,
When 1' and 3' are slid and placed, the force fx4 due to this house 4 acts in the completely opposite direction to the force A1-A3,
Objects moving from the right can be made to slow down or stop. Figure 9 shows the electrical connection diagram at this time.

If the primary and secondary elements of A1 to A3 are considered to be in phase, it can be said that element A4 is wired in opposite phase.

With this in mind, if cores A3, A2, A1, and core 3 are fixed, cores 1 and 2 are connected to core 3, and their positions are swapped one by one by sliding them. It is possible to move the object to the right in the opposite direction.

Example-1 Among the unit elements for magnetic field generation as shown in Fig. 2,
The dimension of the U-shaped core 1 on the primary side is a = 7.8cm +
A silicon steel plate (so-called "tokoa") with Wc = 2 crn and tc = 1 cm was used, and the U-shaped core 2 on the secondary side had the same dimensions. Also, the common rod shape is core 3.
As, length t = 12.1 cm for the same silicon copper plate,
Using a wire with a width of W-1 cTn, the primary and secondary windings were each wound with 600 turns of 1.2 tanφ wire2.
A 70 μF capacitor was connected to the next side to configure a parametric linear motor. - 120V at 50 Hz to the next winding.

When a 219A AC source was applied, parametric oscillation was confirmed. Figure 1O shows the measurement of the magnetic flux 3wn above this element under these conditions. Figures (a) and (b) correspond to each other in positional relationship. On the center, ie on the A-A' line.

When measurements were taken by tracing the center line of A2, ie, c-c', on the center line of thin wire core 3, ie, on the C-σ line, to the left and right, the magnetic flux distribution was as shown in Figure (b). (b) A in the figure,
The B and C curves are A-A', B-B', and c in (,).
-c' correspond to each other on the twill line.

As a result, it is clear from curves A and C that a peak value of about 1000 Gauss of magnetic flux is generated on the pole end face of the U-shaped core.
Moreover, the peak of the magnetic flux is also shifted in correspondence with the shift of Δt=3.5 cm between cores 1 and 2.

Curve C representing the magnetic flux on the common rod core is for cores 1 and 2.
The peak value of 0 was only around 1/3 or less.If the deviation Δt is completely 0, then the parameter is

There was no oscillation, and no magnetic field was generated on the secondary side.

As will be described later, since the magnetic flux of the primary side core and the magnetic flux of the secondary side are out of phase by 90 degrees, a magnetic plate or a magnet plate is installed as a mover on the top surface of this device.

Alternatively, it was confirmed that when a conductive metal plate such as an aluminum plate is placed on a trolley or the like, it moves in the left and right direction.

Example-2 Using the magnetic field generating element of Example-1.

Primary winding current Il when changing the primary winding voltage
, the induced voltage of the power Ply secondary winding B21. Current i2 +
Using a trolley with a total weight of 360 gr and carrying iron plates,
Figure 11 shows the value F' on the scale when the spring head 9 is fixed and the scale is in balance.

However, a 75 μF capacitor was connected to the secondary side.

It has been found that when El is below 118V, no ramometric oscillation occurs, and with this value as the boundary, there is a significant difference in the propulsive force F.

Figure 12 shows the primary and secondary voltage and current waveforms Et * Is r B2 r I2 measured by the oscilloscope in the state of parametric oscillation at this time.
It is clear that there is a phase shift between the next '[1111 and the secondary side]. This phase shift produces the effect of a propulsive force acting in the length direction of the common rod-shaped core.

I was able to do it.

Although the magnetic field generator element has been described above as a stator, the movable body, that is, the movable element is a magnetic plate made of iron or the like.

If it is a permanent magnet, it will not be moved by the traveling magnetic field as described above, but even conductive materials such as aluminum plates and copper plates will have a propulsive force due to the eddy current effect. However, in the case of eddy current, the force F deteriorates.

Furthermore, it is obvious that a magnetic field generating device element using parametric oscillation can be placed on a cart or the like and moved over a long magnetic body or permanent magnet body.

The parametric linear motor of the present invention has an extremely simple structure compared to conventional linear motors.

A traveling wave magnetic field can be sufficiently generated using a single-phase AC power source. The waveform does not have to be a perfect sine wave yet. Furthermore, as described above, no slots are required, the magnetic poles can be easily manufactured, and the coil can be formed by die winding, resulting in cost reduction.

The motor according to the present invention has a large starting torque, speed control and forward/backward movement are relatively simple, and is suitable for industrial applications such as transportation machines, vehicles, actuators, etc.
It can be used in all fields.

Margin below

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an A-ramometric induction motor for detailed explanation of the present invention, Fig. 2 is a diagram showing elements of a linear motor according to the present invention, (&) is a front view, and (b) is a side view. FIG. 2C is a top view. Fig. 3 is an electrical connection diagram of the elements, Fig. 4 is a front view showing the configuration of the linear motor according to the present invention, Fig. 5 is its electrical connection diagram, and Fig. 6 is a diagram of the linear motor when a moving object is mounted on it. FIG. 7 is a top view showing another embodiment of the present invention, and FIG. 8 is a top view (a) and a side view (b) showing still another embodiment of the present invention. FIG. 9 shows an electrical wiring diagram at that time. FIG. 10 is a magnetic flux density distribution diagram of the magnetic field generating element in the example. Figure 11 shows 11 when the primary winding voltage E1 is varied.
Curve showing + pt + B2 + I2 and force F. Figure 12 is an oscilloscope waveform diagram of El, il 1 B2 + I2, 1.1', 2.2': IJ-shaped core, 3:
Rod-shaped core, 4: Primary winding, 5: Secondary winding, 6: Resonant capacitor, 7: Moving body, 8: Rail, 9: Snake, = II8V E, = +30V

Claims (8)

[Claims] (1) A rod-shaped core made of a magnetic material and a U-shaped core made of a magnetic material on both sides are shifted, and the rod-shaped core and the U-shaped core are in contact with both sides of the husband's U-shape. The U-shaped core is assembled, and one leg of the U-shaped core is provided with an input primary winding, the other core leg is provided with a secondary winding, and a resonance capacitor is connected to this secondary winding. A plurality of these elements are arranged in the traveling direction as a unit, single-phase AC power is input to the primary winding, and hard and soft magnetic materials, A magneto-mechanical actuator characterized in that a conductive metal body is moved. (2) Rolling a plurality of unit elements for magnetic field generation, 1
2. The magneto-mechanical actuator according to claim 1, wherein the direction of the traveling magnetic field of one or more unit elements is opposite to that of other elements. (3) A magneto-mechanical actuator according to claims 1 and 2, in which magnetic field generating unit elements are arranged in parallel. (4) The magneto-mechanical actuator according to any one of claims 1 to 3, wherein the magnetic field generating element is a stator. (5) The magneto-mechanical actuator according to any one of claims 1 to 3, wherein the magnetic field generating element is a movable element. (6) The magneto-mechanical actuator according to any one of claims 1 to 5, wherein a soft magnetic material is used as an object that moves relative to the magnetic field generating element. (7) A magneto-mechanical actuator according to claims 1 to 5, in which a permanent magnet is used as an object that moves relative to the magnetic field generating element. (8) Claims 1 to 5 in which a conductive metal body is used as the object that moves relative to the magnetic field generating element.
Magneto-mechanical actuator as described in Section 1.