JPH059923B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electromagnet device.

[Conventional technology]

Generally, an electromagnet device involves a permanent magnet in a magnetic circuit including a coil, and either superimposes the magnetic flux of the coil on the magnetic flux of the permanent magnet, or attenuates the magnetic flux of the permanent magnet with the magnetic flux of the coil. I'm trying to get amateurs moving.

For example, in the electromagnet device described in Japanese Patent Publication No. 55-41005, as shown in Figure 3, an E-shaped yoke is formed by upper piece C, middle piece C, and lower piece D, and the middle piece C is equipped with a coil ho. And one armature/permanent magnet is made to face each of the end faces of one side (R), (C), and (D). In this case, the magnetic flux X to the permanent magnet seems to be shown by the solid line in the figure, but the magnetic flux Y of the coil is
In a certain excitation state, it seems to be indicated by a broken line. Therefore, in the gap between each side B, C, D and the permanent magnet, the directions of both magnetic fluxes X and Y are opposite, and the magnetic flux of the coil H is Attenuates the magnetic flux to
The amateur permanent magnet moves horizontally in the direction of arrow Z due to the repulsive force. Next, when a current is passed so that the direction of the magnetic flux in the coil is opposite, the magnetomotive flux becomes superimposed in the same direction as the magnetic flux X to the permanent magnet, and the amateur permanent magnet (F) is attracted. .

[Problem to be solved by the invention]

In this conventional example, as seen above, the magnetomotive flux of the coil flows inside the permanent magnet, but since the permanent magnet has a higher magnetic resistance than the yoke (iron), the sensitivity deteriorates. was.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnet device in which the magnetomotive flux of the coil does not pass through the permanent magnet, so that the sensitivity is not impaired and the attractive force is improved.

[Means to solve the problem]

In order to solve the above problems, an electromagnet device according to the present invention has two groups of magnetic pole parts each consisting of a central magnetic pole part and opposing magnetic pole parts sandwiching the central magnetic pole part, which are arranged on both sides, and the central magnetic pole part and the opposing magnetic pole part on each side are connected to a coil. A coil block, which has opposite polarity due to excitation, and two armatures, in which the same side ends of two parallel magnetic pieces are connected via a permanent magnet, have opposite polarities. The armature block and the coil block are connected by non-magnetic pieces so that the other end of each of the magnetic pieces of both armatures is connected with the magnetic pole group. The central magnetic pole part and the opposing magnetic pole part are inserted into two gaps formed by each other, and the other end of each magnetic piece is alternately inserted into the central magnetic pole part and the opposing magnetic pole part by excitation of the coil. The armature block is driven by moving it towards and away from it.

[Effect]

An armature is constructed by connecting the same side ends of two parallel magnetic pieces through a permanent magnet, and the other end of each magnetic piece is connected to a central magnetic pole part and an opposing magnetic pole part sandwiching this. If the coils are inserted into the two gaps formed by the central magnetic pole part and the opposing magnetic pole part of the magnetic pole part group consisting of , the sensitivity is improved and the magnetic efficiency is also increased.

However, as mentioned above, if the other end of each magnetic piece of the armature is simply placed between the central magnetic pole part and the opposing magnetic pole part of the coil block, the operating force applied from the coil block to the armature will be reduced. is added to the end of the magnetic piece. If an attempt is made to move the entire armature by applying a working force to the end of the magnetic piece that is away from the permanent magnet, which is the main body of the armature, a moment will be generated around the center of gravity of the armature, as is clear from the principles of mechanics. As a result, the armature is unable to move in parallel in a straight line, and may move at an angle, or only the ends of the magnetic pieces move significantly, while the center of gravity of the armature, that is, the permanent magnet part, does not move much. occurs.

If the amateur arm does not move in parallel in a straight line and the center of gravity moves less, the contact mechanism of the relay that is installed integrally with the armature arm will not be able to operate quickly and accurately, ensuring a sufficient operating stroke. This may result in failure or malfunction.

Therefore, in the present invention, two armatures having the above-mentioned structure are arranged with respect to the magnetic pole groups on both sides of the coil block so that the magnetization directions of the permanent magnets are opposite to each other. In both cases, the two armatures are connected by a non-magnetic piece. In this way, if a pair of armatures are installed symmetrically with respect to the coil block,
For each armature, even if a biased operating force is applied to the end of the magnetic piece and a moment is generated around the center of gravity of the armature, the moment force generated on the two armatures will cancel each other out. , the entire armature block consisting of two armatures and a piece of non-magnetic material can perform accurate linear parallel movements.

〔Example〕

Hereinafter, this invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2. The coil block 9 has three yokes 1a, 1b, and 1c arranged in parallel, and an excitation coil 3 is located in the center of the central yoke 1b.
By winding the yoke 1b, the yoke 1b becomes an iron core. Therefore, two magnetic pole groups are formed on both sides as described below.
That is, each end of the central yoke 1b becomes a central magnetic pole, and each end of the both yokes 1b and 1c, that is, each end sandwiching each central magnetic pole, has a polarity opposite to that of the central magnetic pole due to the excitation of the coil 3. This is a group of two magnetic pole parts that form opposing magnetic pole parts. On the other hand,
The amateur block 6 is made up of two soft magnetic pieces 4.
Two armatures 6a, 6b are formed by connecting one ends of a, 4b with a permanent magnet 5 to form a U-shape. It is integrally connected. This connection is performed by setting the magnetization direction of the permanent magnet 5 in the opposite direction.
As shown in Figure 1, the upper end of the left permanent magnet 5 is the N pole,
The upper end of the right permanent magnet 5 is made to be the S pole. This armature block 6 has each soft magnetic material piece 4 of each armature 6a, 6b.
The other ends of a and 4b are respectively inserted into two gaps formed by the central magnetic pole part and the opposing magnetic pole part of the magnetic pole group consisting of the central magnetic pole part of the coil block 9 and the opposing magnetic pole part sandwiching the central magnetic pole part. It is combined with a coil block 9. As a result, in this electromagnetic device, armatures 6a and 6b are
The upper and lower surfaces of the other ends of each soft magnetic material piece 4a, 4b are the armature surfaces 8a, 8b, 8c, 8d, and the upper and lower surfaces of each central magnetic pole part, which are both ends of the central yoke 1b, are the armature surfaces 7b, 7c,
The inner surfaces of the opposing magnetic pole portions sandwiching each central magnetic pole portion are polarized surfaces 7a and 7d. And each armature surface 7a,
8a, 7b, 8b, 7c, 8c, 7d, and 8d are opposed to each other with appropriate gaps. Figure 2a,
b shows a relay in which both blocks 6 and 9 constructed as described above are housed in a housing 11 consisting of a base 18 and a cover 19. In this case, the non-magnetic material piece 17 is shown positioned at the bottom. In the figure, 30 is a balance spring, and 31 is a terminal.

In such a configuration, when the excitation coil 3 is energized to excite the left end of the central yoke 1b (left central magnetic pole part) to the S pole as shown in FIG. 1, the magnetic flux is generated between the armature surfaces 7b and 8b. Y ₁ is superimposed on the magnetic flux X of the permanent magnet, and between the armature surfaces 7c and 8c, the magnetic fluxes X and Y ₂ are in opposite directions and attenuate, so the armature surfaces 7b and 8b are attracted, and the armature block 6 moves in the direction of arrow P. Next, when the left end of the central yoke 1b (left central magnetic pole part) is excited to the N pole, the magnetomotive flux Y ₂ is superimposed on the magnetic flux X of the permanent magnet 5 between the armature surfaces 7c and 8c, and the armature surface Between 7b and 8b, the magnetic fluxes X and _Y1 are in opposite directions and attenuation occurs, so that the armature surfaces 7c and 8c are attracted, and the armature block 6 moves in the direction opposite to the direction of arrow P. FIGS. 2a and 2b show that as the armature block 6 reciprocates as described above, the contact provided on the non-magnetic piece 17 moves up and down to open and close the contact.

〔Effect of the invention〕

Since the electromagnet device according to the present invention is configured as described above, the magnetomotive flux of the excitation coil flows across the magnetic material piece of the armature and does not flow through the permanent magnet. Therefore, the magnetic resistance is smaller and the sensitivity is higher than in the conventional case where the magnetomotive flux of the coil is passed through a permanent magnet. moreover,
The magnetic flux of the coil is collected by one end of each magnetic body of each magnetic pole group, and the coil magnetic flux can be used more effectively than in the conventional case where a permanent magnet is placed on the end face of the yoke. The coil can be made smaller, and on the other hand, the magnetic pole face of the permanent magnet is perpendicular to the magnetization direction, which improves the utilization efficiency of the magnetomotive flux compared to the conventional parallel face. In addition, since magnetic pieces are in contact with each magnetic plate end face, magnetic flux is concentrated between the magnetic plate pieces, and leakage magnetic flux is extremely small compared to conventional magnetic plate pieces that do not have magnetic pieces. The permanent magnet can be made smaller than these.

As described above, the present invention not only has higher sensitivity than the conventional one, but also can improve the suction force if the coil specifications are the same.

Further, in the present invention, two armatures having the above-mentioned structure are respectively arranged with respect to the magnetic pole groups on both sides of the coil block so that the magnetization directions of the permanent magnets are opposite to each other. In addition, since the two armatures are connected by a non-magnetic piece, the moment force generated in each armature can be canceled out, and the entire armature block can be accurately translated in a straight line. .

As a result, accurate linear driving force can be transmitted to the contact mechanism of the relay driven by the armature block with a sufficient operating stroke, allowing the relay to operate quickly and accurately. becomes possible.

The electromagnet device of the present invention can exhibit excellent performance when used in various applications requiring accurate linear motion, in addition to the relay described above.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of the electromagnet device of this invention.
FIGS. 2a and 2b are a schematic cross-sectional view and a schematic vertical cross-sectional view of a relay incorporating the same electromagnetic device as described above, respectively, and FIG. 3 is a schematic configuration diagram of a conventional example. 1a, 1b, 1c...Yoke, 3...Exciting coil, 4a, 4b...Magnetic material piece, 5...Permanent magnet,
6a, 6b...Amateur, 6...Amateur block, 7a-7d, 8a-8d...Archive surface, 9
...Coil block, 17...Non-magnetic material piece.

Claims (1)

[Claims] 1. A coil block in which two groups of magnetic pole parts each consisting of a central magnetic pole part and an opposing magnetic pole part sandwiching the central magnetic pole part are arranged on both sides, and the central magnetic pole part and the opposing magnetic pole part on each side have opposite polarities by excitation of the coil. and two armatures formed by connecting the same side ends of two parallel magnetic pieces via a permanent magnet are connected by a non-magnetic piece so that the magnetization directions of the permanent magnets are opposite to each other. The armature block and the coil block are arranged such that the other end of each magnetic piece of the armature is located in the two gaps formed by the central magnetic pole part and the opposing magnetic pole part of each magnetic pole group. The magnets are inserted and combined, and the armature block is driven by energizing the coil to alternately move the other end of each of the magnetic pieces towards and away from the central magnetic pole part and the opposing magnetic pole part. Electromagnetic device.