KR910000598Y1 - Electromagnetic actuator - Google Patents

Abstract

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Description

[Designation name]

Electronic actuator

[Brief Description of Drawings]

1a, b, c is an explanatory diagram of the present invention.

2 and 3 are characteristics of the present invention.

4 and 5 are explanatory diagrams of a conventional electronic actuator.

[Detailed Description of Utility Model]

The present invention relates to an electromagnetic actuator utilized in a wide range of industries and public welfare, such as an electromagnetic switch, an electromagnetic valve, an electromagnetic brake, an electromagnetic clutch, and the like.

[Background]

BACKGROUND ART Conventionally, an electromagnetic actuator using an electromagnetic suction force acting on a movable piece of a magnetic body has been used by energizing electric windings wound around a fixing piece of a magnetic body.

In addition, a so-called latching type electromagnetic actuator is also used in which the magnetomotive force by energization of electric windings and the magnetomotive force of permanent magnets act in series on a movable piece of a magnetic body.

4A and 4B are explanatory diagrams of a configuration of a clapper-type electronic actuator which is the above-described conventional apparatus, and includes a fixing piece 3, an electric winding 2, and a magnetic body having magnetic pole surfaces 3a and 3b. It consists of the movable piece 4 and the springs 5 of a magnetic body.

In addition, FIG. 4A shows that the movable piece 4 is not energized by the electric winding 2, and the movable piece 4 is isolated from the magnetic pole surfaces 3a and 3b by the resistance of the spring 5 in the direction of the arrow 7. Indicates the state.

In such a state, when the electric current necessary for the electric winding 2 is applied, the electron attraction force which overcomes the resistance of the spring 5 is induced between the stationary piece 3 and the movable piece 4, and FIG. The adsorbed state of the fixed piece 3 and the movable piece 4 shown in the figure is shifted.

As a result, the operation force is applied to an electrical contact or valve rod (not shown) to stop the energization of the electric winding 2, thereby restoring to the state shown in FIG.

5A and 5B are explanatory diagrams of a configuration of a latching actuator which is the latter conventional apparatus described above, wherein the magnetic strips 3, 3b, and magnetic windings 2, 3 of the magnetic body have magnetic pole surfaces 3a, 3b. It consists of a movable magnet (4) of the magnetic body, a fixed piece (3) of the magnetic body, a permanent magnet (1) and a spring (5) supported by being sandwiched at one end of the magnetic body.

FIG. 5A shows a stable state in which the movable piece 4 is isolated from the magnetic pole surfaces 3a and 93b due to the resistance of the spring 5 in the direction of the arrow 7 when the electric winding 2 is not energized. It is in a state.

In this state, electric current is applied to the electric winding 2 so as to induce the magnetic force of the same polarity as the magnetic force of the permanent magnet 1.

Thereby, the electron attraction force which overcomes the resistance force of the spring 5 to the arrow time 7 direction between the fixed piece 3 and the movable piece 4 by the superimposed effect of both magnetic force is produced | generated.

This shifts to the adsorption | suction state of the stationary piece 3 and the movable piece 4 shown in FIG. 5B, and applies an operating force to an electrical contact, a valve rod, etc. which are not shown in figure.

And in the state shown in FIG. 5B, even if the electricity supply to the electric winding 2 is stopped, this state is continued only by the action of the suction force of the permanent magnet 1. As shown in FIG.

In addition, in the state shown in FIG. 5B, when the electric winding 2 is subjected to a predetermined energization which induces the magnetic force of the permanent magnet 1 and the magnetic force of reverse polarity, the canceling effect of both magnetic forces and the spring 5 By the action of the resistance force), it returns to the state shown in FIG. 5A and can perform a known so-called latching operation.

However, the above-described conventional electronic actuators have the following problems.

(1) The ampere turn necessary to close the gap is large.

In particular, the latching type requires a larger amperion, due to the structure in which permanent magnets with large reluctance are inserted in series into a magnetic pole that is energized by electric winding.

(2) The type in which it is necessary to sustain the energization while the attraction force is applied has a large power consumption in addition to the conditions (1) described above.

(3) The above condition (1) causes an increase in the temperature of the electric winding, and the shape becomes large.

(4) Consideration for residual magnetic flux measures is necessary for direct current electromagnets.

(5) Since latching type electromagnetic actuators have different required amperages during the suction operation and the return operation of the movable piece, the electric circuit of the driving circuit needs to be complicated or the suction and the return are required.

[Initiation of draft]

The present invention is proposed to solve the above problems, and an object of the present invention is to provide a high sensitivity, power saving, small size, light weight, and simple and robust electronic actuator that can be driven by a small power source.

Next, the whole matter of this invention is demonstrated with reference to FIG.

1 is a schematic diagram for explaining the principle of operation of the present invention, the magnetic flux due to the magnetic force of the movable piece 4 of the permanent magnet øm, the classification in the left and right directions in the fixed piece 3, respectively, α · φm, β · φm (alpha, β sms <1 indicate the fractionation rate). If the induced magnetic flux by energizing the electric winding 2 is øi and the proportional constant is k, and the leakage of the magnetic flux is ignored for simplicity, the suction force F acting on the movable piece 4 during energization of the electric winding is It is represented by the formula.

With α + β = 1

Here, if øm = n øi (n is the magnet coefficient), (1) can be expressed as follows.

On the other hand, with the conventional electromagnetic actuator of the same proportional constant as the electromagnetic actuator, if the induced magnetic flux by the energizing current is øi ₀ and the suction force acting on the movable piece 4 at that time is Fo, the following equation is established.

In the formulas (2) and (3), øi = øi ₀ , that is, in the same excitation amperion,

In addition, when F = Fo, that is, the same suction force,

It is possible to get a relation.

That is, the present invention is easy to generate a multiple of the suction force by the same excitation amperage, and to generate the same suction force as compared with the conventional apparatus, it is easy to use a few excitation amperes, (4), (5) It is also possible to refer to Figs. 2 and 3 in which specific values are substituted in the equation, and F / Fo and? / Øi ₀ are calculated using β as a parameter.

The present invention is established on the basis of the above-described prerequisites, and includes a fixed piece, a movable piece which faces each other so that contact release is free from the fixed piece, and forms the fixed piece and the waste path, and the closed piece. It is composed of an electric winding wound on a magnetic path to generate a first magnetic flux by energization, and a permanent magnet to generate a second magnetic flux. The second magnetic flux is classified into two magnetic fluxes (αøm and βφm). In the electromagnetic actuator which acts in parallel with the first magnetic flux so as to offset or expand the first magnetic flux and move the movable piece 4, the permanent magnet has a permanent magnet in the fixed piece 3 which forms a closed path. And a bubbling magnetic body (6) for adjusting the magnetic flux distribution ratios (α, β) of the electromagnetic actuator, wherein the movable piece (4) is provided inside the fixed piece (3). Between the saturable magnetic material 6 and the space portion 6b And a permanent magnet arrangement is formed of the electromagnetic actuators.

The present invention, as described above, the appearance and dimensions of the electromagnetic actuator is approximately proportional to the required excitation amperion, and is proportional to the square of the excitation ampere turner consumed power, and exhibits the following excellent effects, Major contributions are made to various industries and fields of public welfare.

(1) The suction force can be generated several times with the same amperage power as in the prior art.

(2) The same suction force can be generated by the power of a few amperes of the conventional apparatus.

(3) Electromagnets having various functions such as monostable, bistable, and polystable can be easily manufactured.

In the above characteristics can exhibit the following specific features.

(a) The operation of various machines and apparatuses becomes easy by utilizing a small power source such as a solar cell or a dry cell.

(b) High sensitivity and energy saving.

(c) It can be small and light.

(d) The influence of residual magnetism can be excluded, and the operation is sure.

(e) The structure is simple, robust and suitable for mass production.

[Best Mode for Implementing a Design]

Referring to the present invention according to the embodiment with reference to the drawings as follows.

A description with reference to FIGS. 1a, b, and c is provided.

First, the waste is formed by the fixing piece 3 of the magnetic body of the closed loop shape.

The electric winding 2 is wound around this closed furnace and excites.

Next, the movable piece 4 made of permanent magnets forms metal bridges through the gaps between the pairs of divided sections facing the wastes, and applies magnetic force.

In addition, since the distribution ratio of alpha and beta is an important factor functionally from the premise mentioned above, one pair of saturable magnetic bodies 6 which are magnetic flux adjustment parts are inserted to face the required portion of the fixing piece 3 to the lung, The magnetic flux distribution ratio is adjusted by increasing the suction force for moving the movable piece 4.

As for the movable piece 4 of a permanent magnet, the magnetic pole surfaces 4a and 4b face the side part 6a of the saturable magnetic body 6 of the fixing piece 3 of a magnetic body through the clearance gap, (7) or excreted so that it can be shifted in the opposite direction.

When the electric winding 2 is not energized, it is maintained in the position shown in FIG. 1B by the resistive force of the spring which is not shown in figure.

In the state shown in FIG. 1B, when a predetermined current that induces the magnetic flux øi ₁ of the polarity shown in the figure is applied to the electric winding 2, as described in the above-described prerequisite knowledge, the magnetic flux øi ₁ , ( The movable piece 1 made of permanent magnets shifts to the left in the state shown in FIG. 1A by the effect of the overlap of? φm) and (βφm).

On the contrary, in the energization which induces reverse magnetic flux øi _{2 as} shown in FIG. 1B, it is displaced to the right in the state shown in FIG. 1C.

In addition, after the transition to the state shown in FIG. 1A or 1C is stopped, the energization to the electric winding 2 is stopped, thereby automatically returning to the state shown in FIG. 1B or shown in FIG. 1A or 1C. Selection of operating characteristics such as self hold in a state can be made arbitrarily.

[Industry availability]

As described above, the present invention is very useful for an electronic operating device, an electronic operating piston, an electronic lock, an opening / closing operation mechanism, an intrinsically explosive device, a detachment mechanism in case of abnormality, and other industrial and public fields.

Claims (2)

A fixing piece, a movable piece which faces each other so that contact fixing is free from the fixing piece, and forms the fixing piece and the waste path, an electric winding wound around the waste path and generating a first magnetic flux by energizing; The second magnetic flux is configured as a permanent magnet that generates a second magnetic flux, and the second magnetic flux is classified into two magnetic fluxes (αøm and βφm), and offset or overlaps with the first magnetic flux so that the movable piece 4 is formed. In the electromagnetic actuator which acts in parallel with the first magnetic flux so as to move, the fixing piece 3 which forms a closed path has a saturable magnetic body 6 for adjusting the magnetic flux distribution ratios α and β of the permanent magnet. Electronic actuator comprising a). The electromagnetic actuator according to claim 1, wherein the movable piece (4) is a permanent magnet arranged inside the stationary piece (3) with a saturable magnetic body (6) and a space (6b) interposed therebetween.