JPS634685B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Application) The present invention is a so-called four-gap type in which there are four armatures, and a permanent magnet is interposed in the magnetic circuit.
The present invention relates to a polarized electromagnet device that causes the armature to horizontally reciprocate by superimposing and attenuating the magnetic flux of a coil on the magnetic flux of the permanent magnet.

(Problems with the Prior Art) Generally, in a polarized electromagnet device, the center of an armature is supported by a round shaft, and the armature swings so that its two polarized surfaces contact the yoke at diagonal positions.

The drawback of this is that unless the three points of the armature's diagonal armature surfaces and the central round shaft are accurately aligned due to dimensional accuracy, only one armature surface will come into contact with the other. This may cause the adhesion force to the armature's contact surface to vary or become insufficient.

Therefore, there is a model, for example, Japanese Patent Publication No. 55-41005, in which this armature is horizontally reciprocated and the central round shaft is eliminated.

That is, as shown in Fig. 2, the upper, middle, and lower pieces form an E-type yoke, the middle piece is equipped with a coil hole, and each piece is equipped with an armature and a yoke. The permanent magnet faces the permanent magnet, and the magnetic flux Y due to the permanent magnet is superimposed on the magnetic flux X due to the coil ho, causing it to be attenuated. FIG. 2 shows a state in which the magnetic flux X attenuates the magnetic flux Y, and the armature/permanent magnet horizontally moves in the direction of arrow Z (repulsion direction). Further, when the excitation direction of the coil ho is reversed, the magnetic flux X becomes superimposed on the magnetic flux Y, and the armature and permanent magnet horizontally moves in the direction opposite to the direction of the arrow Z (attracting direction).

In this case, the magnetic flux X of the coil passes through the armature and permanent magnet, which has a large magnetic resistance, making it difficult for the magnetic flux X to flow, resulting in poor sensitivity.

(Purpose) The present invention has been made in view of the above points, and its purpose is to provide a four-gap type device that does not impair sensitivity by preventing the magnetic flux of the coil from passing through the permanent magnet. To provide polar electromagnet equipment.

(Disclosure of the Invention) An embodiment of the present invention will be described below with reference to FIG.

1 is a U-shaped outer yoke, consisting of a lower piece 2, left and right side pieces 3,
Consists of 4. 5 is an amacha that moves horizontally back and forth,
Horizontal rod 6 and left and right side pieces 7, 8 fixed to both ends thereof
As a result, the left and right side pieces 7 and 8 face the inner surfaces of the left and right side pieces 3 and 4 of the U-shaped outer yoke 1, and are separated.

Reference numerals 9 and 10 designate two permanent magnets, which are arranged in parallel so that the magnetization axis direction from one pole to the other pole is parallel to the axis of the horizontal rod 6 of the armature 5, and the outer one of each has the same pole, for example S The poles face (join) the left and right pieces 3 and 4 of the U-shaped outer yoke 1, respectively.

11 and 12 are the left and right L-shaped middle yokes, and the vertical piece 1
3 and 14 and horizontal pieces 15 and 16. These vertical pieces 13 and 14 are the left and right side pieces 3 of the U-shaped outer yoke 1,
4, and is interposed between the two permanent magnets 9, 10, with its end facing (joining) the other same polarity inside the permanent magnets 9, 10, for example, the N pole. Further, the horizontal pieces 15 and 16 are located parallel to the axis of the horizontal rod 6 of the armature 5, and
Both ends thereof face the inner surfaces of the left and right pieces 7 and 8 of the armature 5. Therefore, the L-shaped middle yoke 11,
Left and right gaps G1, G2 between the end faces of the horizontal pieces 15 and 16 of 12 and the left and right side pieces 7 and 8 of the armature 5, and the left and right gaps G1 and G2 of the armature 5
Four left and right gaps G3 and G4 are formed between the left and right side pieces 7 and 8 of the U-shaped outer yoke 1 and the left and right side pieces 3 and 4 of the U-shaped outer yoke 1.

A coil 18 is wound around a winding frame 19. The horizontal rod 6 of the armature 5 is inserted into the inner hole 20 of the winding frame 19 so as to be horizontally movable. 17
is the output rod of the armature 5 that protrudes through the left side piece 3 of the U-shaped outer yoke 1. Therefore, the arrangement of the permanent magnets 9, 10 and the coil 18 is such that the magnetization axis direction of the permanent magnets 9, 10 and the magnetization axis direction of the coil 18 are parallel.

(Operation) In FIG. 1, the magnetic flux Y of the permanent magnet 9 is as shown by the broken line and in the direction of the arrow: permanent magnet 9 → L-shaped middle yoke 11 → air gap G1 → left side piece 7 of armature
In the magnetic path of air gap G3 → left side 3 of U-shaped outer yoke → permanent magnet 9, the magnetic flux Y of permanent magnet 10 is as follows: permanent magnet 10 → L-shaped middle yoke 12 → air gap G2 → right side 8 of armature → air gap The magnetic flux flows through the magnetic paths G4→right side 4 of the U-shaped outer yoke→permanent magnet 10, respectively.

Now, when the coil 18 is excited in a certain direction, the magnetic flux
1 → L-shaped middle yoke 11 → L-shaped middle yoke 12 →
Air gap G2 → right side piece 8 of Amatea → horizontal rod 6 of Amatea, horizontal rod 6 of Amatea → left side piece 7 of Amatea → air gap G3 → left side piece 3 of U-shaped outer yoke → U-shaped outer yoke The magnetic flux flows through the magnetic paths of the lower piece 2 → the right side 4 of the U-shaped outer yoke → the gap G4 → the right side 8 of the armature → the horizontal rod 6 of the armature.

In this case, focusing on both magnetic fluxes X and Y, the air gap G
Attenuation (repulsion) in 1, superposition (attraction) in gap G2,
Since the air is superimposed (suction) in the gap G3 and attenuated (repulsed) in the gap G4, the armature 5 moves horizontally to the left.

Next, when the coil 18 is excited in the opposite direction to the above, the magnetic flux X flows in the opposite direction of the arrow, and therefore the relationship of superposition and attenuation in each gap G1, G2, G3, and G4 is different from the above. Since the situation is reversed, the armature 5 horizontally shifts to the right.

Also, after the armature 5 moves horizontally, the coil 18
Even when demagnetized, the armature 5 maintains its state due to the magnetic fluxes Y and Y of the permanent magnets 9 and 10.

As is clear from this operation, the magnetic fluxes X and X of the coil 18 do not pass through the permanent magnets 9 and 10.

(Effects) The four-gap polarized electromagnet device of the present invention includes a U-shaped outer yoke consisting of a lower piece, left and right side pieces, left and right side pieces that face and separate from this left and right side piece, and these left and right side pieces at both ends. and a horizontally reciprocating armature inserted into the coil, two permanent magnets with one pole of each facing the left and right side pieces of the U-shaped outer yoke, and an intermediate between the two permanent magnets. The left and right L-shaped middle yokes are made up of the interposed vertical pieces, the left and right side pieces of the armature, and the horizontal pieces whose ends face each other, and the direction of the magnetization axis from one pole of the permanent magnet to the other pole and the magnetization of the coil. Because the coil is parallel to the axial direction, the magnetic flux of the coil does not pass through the permanent magnet, so the magnetic flux does not become difficult to flow, and the sensitivity of the 4-gap polar electromagnet device is not impaired. be effective.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a conventional example. 1...U-shaped outer yoke, 2...Lower piece of U-shaped outer yoke, 3...Left side of U-shaped outer yoke, 4...Right side of U-shaped outer yoke, 5...Amachia, 6...Horizontal of amachia Rod, 7... Left side of the armature, 8... Right side of the armature, 9, 10... Permanent magnet, 11, 12... L-shaped middle yoke, 13, 14... Vertical piece of the L-shaped middle yoke, 15, 16... Horizontal piece of L-shaped middle yoke, 18
... Coil, 19... Winding frame, 20... Inner hole of winding frame.

Claims (1)

[Claims] 1. A U-shaped outer yoke consisting of a lower piece, left and right side pieces,
Left and right side pieces that face and separate from the left and right side pieces, horizontally reciprocating armatures that have these left and right side pieces at both ends and are inserted into the coil, and each of the left and right side pieces of the U-shaped outer yoke are provided with It consists of two permanent magnets whose poles face each other, a vertical piece interposed between the two permanent magnets, a left and right side piece of the armature, and a horizontal piece whose ends face each other, and left and right L-shaped middle yokes. A four-gap polarized electromagnet device characterized in that the direction of the magnetization axis from one pole to the other pole of the permanent magnet is parallel to the direction of the magnetization axis of the coil.