JPH10208931A - Core member and armature member for solenoid actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core member and an armature member for a solenoid actuator having structure realizing a small loss. SOLUTION: Planar members 12 having at least one easy direction of magnetization are laminated semi-elliptically or semicircularly with the easy direction of magnetization being set in the circumferential direction. Two semielliptical or semicircular laminates are bonded contiguously while abutting the outer circumferential faces such that the cut face will be coplanar. The laminates are then disposed oppositely and a coil is set in one recess to produce a core member 10 while a shaft 20 is fixed to the other recess thus producing an armature member 18. Since lines of magnetic force 16 generated from the coil 14 are aligned constantly with the easy direction of magnetization of the planer member 12, the iron loss of a solenoid actuator can be reduced significantly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to reducing the loss of a core member and an armature member for an electromagnetic solenoid actuator.

[0002]

2. Description of the Related Art Hitherto, various improvements have been made to reduce the loss of a core for an electromagnetic solenoid actuator. For example, Japanese Patent Application Laid-Open No. 4-365305 discloses a core member having a structure in which a thin magnetic plate is spirally wound to reduce eddy current loss generated during driving. FIG. 6 is a cross-sectional view of the core member 10 disclosed in this conventional example. In FIG. 6, a core member 10 is formed in a cylindrical shape by stacking spirally deformed plate members 12 made of a magnetic material.

However, such a conventional core member 10
Was effective in reducing the eddy current loss,
There has been a problem that a slight gap is formed between them and the number of magnetic fluxes is reduced. Further, as shown in FIG. 6, the plate-shaped member 12 is deformed so as to form a spiral, so that it is accompanied by strong plastic deformation particularly at its inner part, magnetic properties are deteriorated, and it is difficult to be magnetized. There were also problems.

Therefore, it has been devised that a core member is formed by using a plate-like member such as a directional silicon steel plate which is easy to magnetize in one direction. Such an example is shown in FIGS. First, as shown in FIG. 7, a directional silicon steel sheet is formed in a U-shape to form a plate-shaped member 12. Next, the plate members 12 are laminated radially or spirally to form a cylindrical core member 10. FIG. 8A is a plan view of the core member 10, and FIG. 8B is a cross-sectional view thereof. In FIG. 8B, a coil 14 for operating an electromagnetic solenoid actuator is wound in a U-shaped recess provided in the plate-shaped member 12. When the core member 10 operates, an electric current flows through the coil 14,
Magnetic force lines 16 are generated in the direction as shown in the figure. The plate-shaped member 12 is a directional silicon steel plate, and is easily magnetized in the direction of arrow A in FIG. 7, and iron loss when the magnetic force lines 16 pass in the direction of arrow A is reduced.

[0005]

However, in the plate-like member 12 used for the above-mentioned conventional core member 10, the structure shown in FIG.
Is easy to magnetize in the direction of arrow A, but is difficult to magnetize in the direction of arrow B making an angle of 90 ° with the direction of arrow A. Accordingly, as shown in FIG. 7, when the magnetic force lines 16 pass in the direction B in which the magnetization of the plate-shaped member 12 is difficult, the core loss becomes extremely poor. For this reason, iron loss of the same level as in the case of using a non-oriented silicon steel sheet occurs, and there has been a problem that a oriented silicon steel sheet, which is a low iron loss material, cannot be used effectively.

[0006] Conventionally, the improvement in the reduction of the loss has been exclusively related to the core member 10 only. That is, when configuring the electromagnetic solenoid actuator, no improvement has been made to the armature member 18 that constitutes the drive unit facing the core member 10. For this reason,
At present, a bulk material is used as the armature member 18, but there is also a problem that the iron loss in the armature member 18 is extremely large.

The reason is that the armature member 18 has a cylindrical shape, and the cross-sectional area near the center of the cylinder is smaller than that near the outer periphery by the difference in radius. Therefore, the magnetic flux density B near the center of the cylinder is large. This state is shown in FIG. The magnetic lines of force 16 having entered from the core member 10 travel in the armature member 18 toward the center of the cylinder. For this reason, the cross-sectional area S1 of the portion closer to the center of the cylinder is smaller than the cross-sectional area S2 of the portion closer to the outer peripheral surface, and the magnetic flux density B of the portion of S1 increases. Generally, iron loss W (W / Kg) is substantially proportional to B ² and rises sharply. For this reason, the iron loss W in the S1 portion of the armature member 18 is also partially very large.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a core member and an armature member for an electromagnetic solenoid actuator having a structure capable of realizing low loss.

[0009]

In order to achieve the above object, a first aspect of the present invention is a core member for an electromagnetic solenoid actuator which is formed by laminating plate members which are easily magnetized in at least one direction. The direction of easy magnetization of the plate-shaped member and the direction of the line of magnetic force are always the same.

According to a second aspect of the present invention, in the core member for an electromagnetic solenoid actuator according to the first aspect, the rectangular plate-like member is deformed in the plane direction along the direction of easy magnetization to have a semi-elliptical or semi-circular shape. It is characterized in that two of these laminated in the plane direction are adjacently joined with their outer peripheral surfaces in contact with each other.

According to a third aspect of the present invention, in the core member for an electromagnetic solenoid actuator according to the first aspect of the present invention, the surface of the plate-shaped member has a U-shape, and the direction of easy magnetization is arranged along the U-shape. It is characterized in that two of these laminated in the plane direction are adjacent to each other by contacting the laminated surfaces of the U-shaped legs.

According to a fourth aspect of the present invention, there is provided an armature member for an electromagnetic solenoid actuator which is formed by laminating plate members which are easily magnetized in at least one direction, wherein an easy magnetization direction of the plate member and a direction of a magnetic field line are provided. Are always the same.

According to a fifth aspect of the present invention, in the armature member for an electromagnetic solenoid actuator according to the fourth aspect of the present invention, the rectangular plate-like member is deformed in the plane direction along the direction of easy magnetization to have a semi-elliptical or semi-circular shape. It is characterized in that two of these laminated in the plane direction are adjacently joined with their outer peripheral surfaces in contact with each other.

According to a sixth aspect of the present invention, in the armature member for an electromagnetic solenoid actuator according to the fourth aspect of the present invention, the surface of the plate-shaped member has a U-shape, and an easy magnetization direction is arranged along the U-shape. It is characterized in that two of these laminated in the plane direction are adjacent to each other by contacting the laminated surfaces of the U-shaped legs.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 1A and 1B are a plan view and a side view, respectively, of a core member for an electromagnetic solenoid actuator according to the present invention. FIG. 1 (a),
In (b), the plate-like member 12 that is easy to magnetize in at least one direction is formed in a rectangular shape, deformed in the plane direction, processed into a semi-elliptical shape along the easy magnetization direction, and further processed in the plane direction. Laminate to produce a semi-elliptical laminate. In this case, the direction of easy magnetization of the plate member 12 is oriented in the semi-elliptical circumferential direction. As the plate member 12, for example, a directional silicon steel plate or the like can be used. Two semi-elliptical laminates manufactured in this manner are joined to each other by contacting their outer peripheral surfaces so that the cut surfaces of the semi-ellipse form the same surface, and the core member 10 according to the present embodiment is Be composed. In the present embodiment, a plurality of plate members 12 are stacked in the plane direction. However, in order to prevent the plate members 12 from being separated, several places on the stacked surface are fixed by welding 22. doing.

In the present embodiment, as described above, since the easy magnetization direction is arranged in the circumferential direction of the semi-ellipse, when the coil 14 is wound around the recess to generate the magnetic force lines 16,
The magnetic force lines 16 pass along the circumference of the semi-ellipse, that is, along the direction of easy magnetization. For this reason, the magnetic force lines 16 can always travel in the direction in which the magnetic resistance is small, and the iron loss due to the hysteresis loss can be significantly reduced. For this reason, when the core member 10 according to the present embodiment is used for an electromagnetic solenoid actuator, even if the armature member 18 is a conventional bulk material, the loss of the entire actuator can be reduced. The core member 10 shown in FIG.
As an example, a semi-elliptical shape is shown, but the shape is not necessarily limited to a semi-elliptical shape, and may be, for example, a semi-circular shape.

Further, in order to reduce the total loss of the electromagnetic solenoid actuator, not only the core member 10 but also the armature member 18 may have the same structure. FIG. 2 shows an example in which the same structure as that of FIG. 1 is adopted for both the core member 10 and the armature member 18. In FIG. 2, a rectangular plate-like member 1 made of a directional silicon steel plate or the like is shown.
2 is deformed along the direction of easy magnetization to produce a semicircular laminate. The two armature members 18 are joined together so that the cut surfaces of the semicircles form the same surface, and are attached to the shaft 20 to form the armature member 18. This armature member 18 is
An electromagnetic solenoid actuator is configured to face the core member 10 shown in FIG.

In the example of FIG. 2 as well, when an electric current is applied to the coil 14 wound around the core member 10 to generate the magnetic lines of force 16, the magnetic lines of force 16 are applied to the plate-like member 12 forming the core member 10 and the armature member 18. Along the easy direction of magnetization. Therefore, the total loss of the electromagnetic solenoid actuator can be further reduced. Although the armature member 18 shown in FIG. 2 has a semicircular shape,
A semi-elliptical shape is also possible.

In the embodiment described above, both the core member 10 and the armature member 18 are not cylindrical as in the prior art, but are formed in a rectangular shape as shown in FIG. Accordingly, when the magnetic field lines 16 pass in the easy magnetization direction, that is, in the easy magnetization direction along the circumference of the semi-ellipse or semi-circle, the cross-sectional areas of all portions become equal. For this reason, a local increase in iron loss due to a local increase in magnetic flux density can be prevented. Therefore, the core member 10 according to the present embodiment
According to the structure of the armature member 18, even when a non-directional soft magnetic plate is used, the iron loss can be reduced.

FIG. 3 shows a core member 10 according to this embodiment.
And an explanatory diagram of an example of a method of manufacturing the armature member 18 is shown. In FIG. 3, a plate-like member 12 that is easy to magnetize in at least one direction, such as a directional silicon steel plate, is wound around an elliptical or circular core 24. At this time, the plate-shaped member is wound so that the direction of easy magnetization is the circumferential direction. Also,
As the plate member 12, it is preferable to use a rectangular member having a predetermined length. Next, an appropriate position of the lamination surface is welded 2 so that the wound plate-like member 12 does not fall apart.
Fix with 2. In some cases, it is also preferable to perform varnish impregnation. The thus formed semi-elliptical or circular laminate is cut into a semi-elliptical or semi-circular laminate. As shown in FIG. 1, two of the laminates are joined together to form a core member 10 according to the present embodiment.
Alternatively, the armature member 18 can be formed.

With the above configuration, the direction of easy magnetization of the plate-shaped member 12 is always oriented in the circumferential direction of the ellipse or the circle.
And the direction of the line of magnetic force 16 can be matched. Further, no gap is generated between the plate-like members 12, and a decrease in the electromagnetic force due to a decrease in the number of magnetic fluxes can be prevented.

Embodiment 2 FIG. FIGS. 4A and 4B are a plan view and a side view, respectively, of an electromagnetic solenoid actuator core member according to the present embodiment. In the present embodiment, the plate-like member 12 that is easily magnetized in one direction, such as a directional silicon steel plate, has a U-shape, and the easy magnetization direction is arranged along the U-shape. In this way, a plurality of the plate-like members 12 each having a U-shaped surface are stacked in the surface direction to form a U-shaped laminate. Further, the two U-shaped laminates are joined adjacently so that the laminated surfaces of the U-shaped legs 26 are in contact with each other, and the core member 10 is formed. Also in the present embodiment, as shown in FIG. 4B, the lines of magnetic force 16 generated when a current flows through the coil 14 pass along the U-shape, so that the direction of easy magnetization of the plate-shaped member 12 is always The direction of the line of magnetic force 16 will coincide. Therefore, also in the present embodiment, the iron loss based on the hysteresis loss can be reduced. Also in the present embodiment, an appropriate position on the lamination surface is fixed by welding 22 so that the laminated plate-like members 12 do not fall apart.

FIG. 4 shows an example of the core member 10.
It is also possible to use as.

The core member 10 according to the present embodiment configured as described above has a reduced loss as described above.
Even when combined with an armature made of a conventional bulk material, the iron loss of the entire electromagnetic solenoid actuator can be reduced. Further, FIG.
When the laminate shown in (1) is also used as the armature member 18 together with the core member 10, both iron losses are reduced,
It is possible to further reduce the loss as an electromagnetic solenoid actuator.

FIG. 5 shows an example of a method of manufacturing the laminate shown in FIG. 4 which can be used as the core member 10 and the armature member 18. In FIG. 5A, the plate-shaped member is punched into a rectangular shape extending along the direction of easy magnetization, and cut into three parts at an angle of 45 ° as shown in FIG. 5B. Next, as shown in FIG. 5 (c), a plurality of these three parts are laminated, and as shown in FIG.
Fixed by. Further, as shown in FIG. 5E, the respective laminates are rearranged and arranged so as to have a U-shape, and the cut surfaces at 45 ° are bonded by welding to form a U-shape laminate. Such a U-shaped laminate is formed by the legs 26.
FIG.
Is completed. This laminate can be used as the core member 10 and the armature member 18 as described above.

In this embodiment, since the direction of easy magnetization is arranged along the U-shape, when the core member 10 and the armature member 18 are used,
The lines of magnetic force passing through the inside always coincide with the direction of easy magnetization. Therefore, iron loss during driving can be reduced.

Table 1 shows the measurement results of iron loss when an electromagnetic solenoid actuator is constituted by using the core member 10 and the armature member 18 of each embodiment according to the present invention described above, together with the conventional example. In Table 1, the magnetic flux density 1
The iron loss when the frequency is 50 Hz at T (tesla) is shown.

[0029]

[Table 1] In Table 1, when a bulk material is used for both the core member and the armature member as a conventional example, the iron loss is 15.3 W.
/ Kg. Further, when an involute core as shown in FIG. 6, which is another conventional example, is used as a core member, iron loss is 3.5 W / Kg (when a directional silicon steel sheet is used) and 4.0 W / Kg. Kg (when a non-oriented silicon steel sheet was used).

On the other hand, the first embodiment of the present invention shown in FIG.
When the core member (core-1) according to (1) is used, the iron loss of the electromagnetic solenoid actuator is reduced to 2.7 W / Kg. Similarly, when the core member (core-2) according to the second embodiment of the present invention shown in FIG. 4 is used, the iron loss is also 2.7 W / Kg. Furthermore, as shown in FIG. 2, when the core member and the armature member according to the present invention are used for both the core member and the armature member, the iron loss is significantly reduced to 0.5 W / Kg. Therefore, in each case, the iron loss of the electromagnetic solenoid actuator can be reduced as compared with the conventional example.

It should be noted that the core member and the armature member according to the present invention also have an effect that they can be easily manufactured as compared with the example using the involute core.

[0032]

As described above, according to the present invention,
Since the direction of easy magnetization and the direction of the line of magnetic force of the plate-shaped member constituting the core member or the armature member always coincide, the iron loss of the electromagnetic solenoid actuator can be reduced as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a plan view and a side view of Embodiment 1 of a core member for an electromagnetic solenoid actuator according to the present invention.

FIG. 2 is a side view of an electromagnetic solenoid actuator configured by combining the core member of the first embodiment shown in FIG. 1 with an armature member having a similar laminated structure.

FIG. 3 is a diagram illustrating an example of a method of manufacturing the core member and the armature member illustrated in FIGS. 1 and 2;

FIG. 4 is a plan view and a side view of Embodiment 2 of a core member and an armature member for an electromagnetic solenoid actuator according to the present invention.

FIG. 5 is a diagram illustrating an example of a method of manufacturing the core member and the armature member according to the second embodiment illustrated in FIG.

FIG. 6 is a plan view of a core member having a conventional involute core structure.

FIG. 7 is a view showing an example of a conventional plate-shaped member using a grain-oriented silicon steel sheet.

8 is a diagram showing a conventional electromagnetic solenoid actuator constituted by the plate-like member shown in FIG. 7 and a state of passage of generated magnetic force lines.

[Explanation of symbols]

10 core member, 12 plate member, 14 coil, 16
Lines of magnetic force, 18 armature members, 20 axes, 22 welds, 24 cores, 26 legs.

Claims (6)

[Claims] 1. An electromagnetic solenoid actuator core member formed by laminating plate members that are easily magnetized in at least one direction, wherein the direction of easy magnetization of the plate member is always the same as the direction of the magnetic force line. A core member for an electromagnetic solenoid actuator. 2. The core member for an electromagnetic solenoid actuator according to claim 1, wherein said rectangular plate-shaped member is deformed in a plane direction along an easy magnetization direction to have a semi-elliptical shape or a semi-circular shape. A core member for an electromagnetic solenoid actuator, wherein two members laminated in a plane direction are joined to each other with their outer peripheral surfaces in contact with each other. 3. The core member for an electromagnetic solenoid actuator according to claim 1, wherein the surface of the plate-shaped member is formed in a U-shape, and an easy magnetization direction is arranged along the U-shape. A core member for an electromagnetic solenoid actuator, wherein two laminated members are joined to each other by contacting the laminated surfaces of U-shaped legs. 4. An armature member for an electromagnetic solenoid actuator, which is formed by laminating plate members that are easily magnetized in at least one direction, wherein the direction of easy magnetization of the plate members is always the same as the direction of the magnetic field lines. An armature member for an electromagnetic solenoid actuator. 5. The armature member for an electromagnetic solenoid actuator according to claim 4, wherein the rectangular plate-shaped member is deformed in a plane direction along a direction of easy magnetization to have a semi-elliptical shape or a semi-circular shape. An armature member for an electromagnetic solenoid actuator, wherein two members laminated in a plane direction are joined to each other with their outer peripheral surfaces in contact with each other. 6. The armature member for an electromagnetic solenoid actuator according to claim 4, wherein the surface of said plate-shaped member is formed in a U-shape, and the direction of easy magnetization is arranged along the U-shape. An armature member for an electromagnetic solenoid actuator, wherein two laminated members are joined to each other by contacting the laminated surfaces of U-shaped legs.