KR20060119681A - Electro-magnetic force driving actuator and circuit breaker using the same - Google Patents

Abstract

An electro-magnetic force driving actuator and a circuit breaker using the same are provided to reduce a height or a size of the actuator by directly connecting a moving member to the circuit breaker. In an electro-magnetic force driving actuator(100), a fixed iron core(110) forms the whole outer shape of the actuator by being composed of a magnetic body, and has two paths(111) having predetermined length to up and down directions and penetrated to front and rear directions, and an intermediate wall(112) formed by the two paths(111). A permanent magnet(200,300) is placed on more than one sidewall of both sidewalls of each of the two paths(111). A coil is embedded in the two paths(111) of the fixed iron core(110), wherein the coil is wound in an orthogonal direction to the permanent magnet(200,300), right and left sides thereof penetrate the paths(111), and front and rear sides thereof are exposed to the outside. And, a moving member(400) performs a linear reciprocating movement in a lengthwise direction of the paths(111) where the permanent magnet is arranged by a magnetic field due to the permanent magnet(200,300) and an electron repulsive force due to current density of the coil when current is supplied to the coil forwardly or reversely.

Description

Manipulator using electromagnetic force and breaker using the same {Electro-Magnetic Force Driving Actuator and Circuit Breaker Using the Same}

1A and 1B show an example of a popper extinguishing type circuit breaker in a conventional circuit breaker, and FIG. 1A is a cross-sectional view showing a closed electrode state, and FIG. 1B is an enlarged view showing a SO (opening) state.

Figure 2a to 2g shows the configuration of the manipulator according to a preferred embodiment of the present invention, Figure 2a is a perspective view from the front, Figure 2b is a perspective view from the rear, Figure 2c is a fixed iron core and inner and outer main permanent 2D is an exploded perspective view showing the structure of the coil, FIG. 2E is a cross-sectional perspective view in an assembled state, FIG. 2F is a front view of FIG. 2E, and FIG. 2G is a planar cross-sectional view in an assembled state.

Figures 3a to 3d show one configuration for connecting the manipulator to the breaker according to the invention, Figure 3a is a perspective view, Figure 3b is a cross-sectional view, Figure 3c is a side view, Figure 3d is connected to a breaker It is a schematic cross section showing the status.

4A to 4D are cross-sectional views sequentially illustrating an operation process of the manipulator according to the present invention.

5A to 5C show an example in which a plurality of manipulators are merged according to the present invention. FIG. 5A is a perspective view showing one example, FIG. 5B is a plan sectional view of FIG. 5A, and FIG. 5C is another example. It is a perspective view showing.

6A and 6B are front cross-sectional views showing examples of the manipulator according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: manipulator 110: fixed iron core

111 passageway 112 intermediate wall

200: outer main permanent magnet 300: inner main permanent magnet

400: mover 410: coil

420: first magnetic material 430: second magnetic material

440 housing 500: first outer auxiliary permanent magnet

550: second outer auxiliary permanent magnet 600: first inner auxiliary permanent magnet

650: second inner auxiliary permanent magnet 700: guide

710: guide groove 811: first buffer member

812: second buffer unit `900: electric wire

910: Cable Bayer 920: Bracket

The present invention relates to a manipulator and a breaker using the same to maximize the operation speed and operation force by using the electronic repulsion force to be usefully applied from the breaker for low pressure to the breaker for high and ultra high pressure, and more specifically, Manipulator using electromagnetic force to facilitate the wiring and current supply to the coil, to reduce the height and size of the manipulator and to be compact, to improve the quality and reliability by making the operation simple and stable operation. It relates to a circuit breaker using a manipulator.

The breaker is mainly installed in the transmission line or power receiver of the power transmission line, and it can open and close the normal current when there is no failure in the power system, and cut off the fault current when the short circuit occurs. Protect.

Such breakers are classified into vacuum circuit breakers (VCB), oil circuit breakers (OCB), gas circuit breakers (GCB), and the like according to the arc / insulation medium.

When the breaker interrupts the fault current, it is necessary to extinguish the arc between the two contacts. The gas circuit breaker may be further changed into a puffer type, a rotary arc type, a thermal expansion type, a hybrid extinction type, etc. according to the arc extinguishing method. Are classified.

In the accompanying drawings, FIGS. 1A and 1B show a gas breaker of the above-described breaker of the paper extinguishing method as an example.

The PAPER SOHO type gas circuit breaker uses SF6 gas (sulfur hexafluoride, hereinafter referred to as 'extinguishing gas') as the extinguishing / insulating medium and is mainly used for ultra high pressure (typically 72.5 kV or more) circuit breakers.

As shown in FIGS. 1A and 1B, the paper extinguishing type gas circuit breaker is generally composed of a breaker 10 for blocking a fault current, and a manipulator 50 for operation of the breaker 10. have.

The blocking part 10 is composed of a fixed part and a movable part, and is installed in a container 2 filled with SF6 gas therein.

The fixed part in the said interruption | blocking part 10 is equipped with the fixed arc contact 11 and the fixed main contact 12, while the insulating cylinder 13, the fixed piston 14, the support stand 15, and the support insulator ( 16) and the like.

The movable part in the said interruption | blocking part 10 is equipped with the movable arc contactor 21, the movable main contactor 22, the insulation nozzle 23, the popper cylinder 24, and the insulation operation rod 25. As shown in FIG.

The operating rod 51 of the manipulator 50 is connected to the insulation manipulation rod 25. The movable arc contactor 21, the movable main contactor 22, the insulation nozzle 23, and the popper cylinder 24 are integrally connected to the insulation operation rod 25.

Therefore, when the manipulator 50 is driven, the insulation manipulation rod 25 is moved by the operation rod 51. Subsequently, the movable arc contactor 21, the movable main contactor 22, the insulation nozzle 23, and the popper cylinder 24 move integrally with the movement of the insulation operation rod 25 to operate a closed electrode (current input). Over-current (current blocking) operation is performed.

Specifically, in the steady state, as shown in FIG. 1A, the steady current flows while maintaining the closed state.

However, once an abnormality occurs in the power system and a fault current of several times the normal current (for example, about 10 times) flows, the manipulator 50 is operated by the fault current. Then, as shown in FIG. 1B, the operation rod 51 by the manipulator 50 is pulled, and the operation rod 51 pulls the insulation operation rod 25. Thus, the movable arc contact 21 is separated from the fixed arc contact 11, and the movable main contact 22 is separated from the fixed main contact 12.

At the same time, the popper cylinder 24 is pulled in a direction against the fixed piston 14 to compress the extinguishing gas inside the popper cylinder 24. The compressed extinguishing gas passes through the air supply port 17 and the flow path 18 and is ejected in the direction of the arrow in FIG. 1B to quickly extinguish the arc plasma generated between the fixed arc contact 11 and the movable arc contact 21. The current is cut off (open state).

In such a circuit breaker, the opening operation must be performed at high speed in order to interrupt the fault current and quickly recover the insulation between the poles. By the way, since arc arc is not fully formed only by forming an arc plasma and opening an opening gap, it is necessary to inject an arc extinguishing gas as mentioned above. Therefore, the manipulator 50 must bear the force for compressing the extinguishing gas, that is, the force for operating the popper cylinder 24 against the fixed piston 14.

In other words, in order to increase the opening speed, the operating force must be greatly increased, so that the manipulator 50 requires a larger force and a larger speed.

For example, breakers for high voltage / ultra high voltage (typically 365kv or more) for power transmission have an opening gap (SL: Stroke Length) of about 250 mm and can complete operation within an extremely short time of 45 ms (milliseconds). It requires a lot of strength and speed.

At present, high pressure / ultra high pressure circuit breakers are mainly used with hydraulic actuators or pneumatic actuators. However, these manipulators are expensive enough to occupy one third of the total price of the circuit breaker, and in the case of Korea, most of them depend on imports. In addition, such a hydraulic or pneumatic actuator may be a leakage of the working fluid in accordance with the ambient temperature change. In addition, there are many concerns that the manipulator will not work even if only one of the parts is broken because of many parts.

Therefore, research for developing a manipulator that can replace the hydraulic or pneumatic manipulator has been made worldwide. As a result of the research, spring actuators (spherical springs), motor drives (systems for converting rotational motions into linear motions using motors), and PMA actuators (Permanent Magnetic Actuator) are used. .

However, since the spring manipulator is a system that obtains power by releasing the compressed force when necessary in a state in which the spring is compressed, the manufacturing cost is low, but the elasticity of the spring is not constant, so the reliability of the operating state is low. have. For this reason, it is difficult to apply for high pressure or ultra high pressure that requires the injection of SOHO gas, and the probability of blocking failure is greatly increased when it is applied.

The motor drive is said to be inexpensive in manufacturing cost compared to pneumatic or hydraulic pressure, but it is still expensive and has a problem in that it is difficult to exert a large force. .

The PMA manipulator is to operate the mover by the force of the magnetic field generated in the permanent magnet and the electromagnetic force generated by the current flowing through the coil. Therefore, it is made of a very simple structure, the efficiency of its operation is also good, there is an advantage that can expect a constant and uniform operation has been widely used as a manipulator for low pressure circuit breaker recently.

However, since the PMA manipulator is a system that must be driven by the force of the magnetic field generated in the permanent magnet and the force of the magnetic field generated by passing a current through the coil, the path through which the magnetic field flows must be made into a magnetic body (iron core). In addition, the movable mover must also be made of magnetic material. Therefore, when the breaking capacity is increased and the actuator requires more force, a large amount of magnetic field must be generated, and the magnetic field is saturated (magnetic saturation state: When the magnetization proceeds to a certain degree, the magnetization is increased even if the current is further increased. In the self-saturated state, the magnetic body must be so large that it can flow without increasing the current even in the self-saturated state. Since the magnetic flux density of the permanent magnet and the coil becomes larger and inversely proportional to the square of the pore length, there is a limit to the application of the breaker for a high voltage or ultra high voltage with a large contact gap of the breaker.

For example, if the PMA is applied to the manipulator of a low voltage circuit breaker with an opening gap of about 20 mm, the size of the optimized model (width × length × thickness) is 200 × 250 × 100 mm, so that its weight alone weighs more than 10 kg. do. Therefore, when such a PMA manipulator is used at ultra high pressure, its size must be very large, its weight is much higher than that of a hydraulic or pneumatic manipulator, and manufacturing costs are increased. Therefore, there is still no way to use the PMA manipulator for high or ultra high pressure.

Solving the problems of the conventional manipulators as described above, a new type of manipulator named the electromagnet manipulator or EMFA (Electro-Magnetic Force Driving Actuator) to minimize the size and weight, while maximizing the operating speed It is introduced in Korean Patent Application No. 10-2005-11263 filed by.

The electromagnet manipulator includes a hollow inner cylinder and an outer cylinder made of a magnetic material, and arranges inner and outer permanent magnets on opposite surfaces of the inner and outer cylinders, and a coil and the coil between the inner permanent magnet and the outer permanent magnet. Has a structure in which a movable member of a nonmagnetic material is integrally operated with the coil, and when the current is supplied to the coil, the coil and the movable member are moved by the magnetic field caused by the inner and outer permanent magnets and the electromagnetic repulsion force caused by the current density of the coil. It is a new type of manipulator for linearly moving in the axial direction between the inner permanent magnet and the outer permanent magnet.

However, in such an electromagnetic actuator (EMFA), since the coil is disposed inside the outer cylinder closed on all sides, it is difficult to wire the electric wire for supplying current to the coil into the outer cylinder. In addition, since the wires are moved in the axial direction according to the linear movement of the coil, even if the wires are connected, the movement speed of the coil is large and the wires are subject to fatigue due to compression and tension. It was.

In addition, in the above-mentioned electromagnet manipulator, the mover is disposed inside the hollow inner and outer cylinders which are blocked on all sides, and in order to connect it to an external operating element such as a breaker, the moving shaft or the connecting shaft is moved in the axial direction from the mover. In addition to the long extension, the length of the extension must be considerably longer to sufficiently secure the moving distance of the mover. Therefore, the overall height occupied by the manipulator, that is, the length of the manipulator is increased, and the strength of the connecting shaft or the moving shaft is considered. There is a disadvantage in that the manipulator becomes heavy by increasing the number or using a large diameter.

In addition, since the coil and the mover are simply disposed between the inner and outer permanent magnets without any guide means, when the coil and the mover move in the axial direction, friction occurs with the inner and outer permanent magnets. Loss or lack of movement required new considerations for stable operation of the manipulator.

In addition, the conventional electromagnet manipulator, both the inner and outer permanent magnets and the auxiliary permanent magnets should be made of a cylindrical shape, since it is difficult to make a permanent magnet into one cylindrical shape, in practice, several pieces in the circumferential direction There was a difficulty to place the several pieces inside the fixed iron core after fabrication.

The present invention has been made in view of the various circumstances emerging from the above-described conventional electromagnetic force manipulator (EMFA), and an object of the present invention is to reduce the height and size while easily supplying electric current to the coil of the mover and wiring of electric wires. The present invention provides a manipulator using electromagnetic force (EMFA) and a circuit breaker using the manipulator, which can be manufactured and made easy and the operation of the mover is made stable.

In order to achieve the above object, the manipulator using the electromagnetic force according to a preferred embodiment of the present invention, made of a magnetic body to form the entire outer shape of the manipulator, having two lengths passing through the front and rear direction with a predetermined length in the vertical direction And a fixed iron core having an intermediate wall formed therebetween by the two passages, and having a permanent magnet disposed on at least one wall surface of both walls of each of the two passages of the fixed iron cores. The two passages have a coil wound in a direction orthogonal to the permanent magnet with the middle wall in the middle thereof, the left and right sides penetrating the passageway, and both front and rear sides thereof exposed to the outside, and the coils are disposed in the forward or reverse direction. When the current is supplied, the magnetic field by the permanent magnet and the electric current by the current density of the coil It is characterized by the fact that the movable element is installed in a linear reciprocating motion in the longitudinal direction of the passage in which the permanent magnet is disposed by the magnetic repulsion force.

In addition, the manipulator using an electromagnetic force according to another embodiment of the present invention is made of a magnetic body to form the entire outer shape of the manipulator, and having two lengths penetrating in the front and rear direction while having a predetermined length in the vertical direction, A fixed iron core having an intermediate wall formed in the middle by the two passages, and on both wall surfaces of each of the two passages of the fixed iron core, an outer main permanent magnet and an inner main permanent magnet in the form of a plate are respectively arranged; The two passages of the fixed iron core are wound in a direction orthogonal to the outer main permanent magnet and the inner main permanent magnet while the middle wall is in the middle thereof, and both left and right sides thereof pass through the passage between the inner and outer main permanent magnets. Both front and rear sides thereof have a coil exposed to the outside, and when the coil is supplied with a forward or reverse current Technically, a movable element is installed to reciprocate linearly in the longitudinal direction of the passage between the inner and outer main permanent magnets by the magnetic field caused by the inner and outer main permanent magnets and the electromagnetic repulsion force by the current density of the coil. .

In the manipulator of the present invention described above, upper and lower ends of the inner and outer permanent magnets may further include first inner and outer auxiliary permanent magnets and second inner and outer auxiliary permanent magnets, respectively.

In the manipulator of the present invention, the polarity of the first inner and outer auxiliary permanent magnets and the second inner and outer auxiliary permanent magnets is arranged in a direction opposite to that of the inner and outer main permanent magnets. desirable.

In the above-described actuator of the present invention, it is preferable that the movable member has a first magnetic body and a second magnetic body disposed at upper and lower ends of the coil thereof, and the coil and the first and second magnetic bodies are integrated.

Here, the coil and the first and second magnetic bodies may be embedded in the housing of the nonmagnetic material to form the integrated mover.

In the manipulator of the present invention, a guide shaft is extended to a portion exposed to the outside of the fixed iron core of the mover, and the guide shaft of the mover is linearly coupled to a position adjacent to the fixed iron core to allow the linear movement. Guides for guiding linear movement of the mover may be installed.

In the manipulator of the present invention, at the end of the longitudinal movement with respect to the passage of the mover, the movable member is provided at the upper and lower ends of the passage so as to prevent the mover from impacting the fixed iron core forming the upper and lower ends of the passage. It is preferable to install 1,2 buffer members.

In the manipulator of the present invention described above, it is preferable to provide a cable bay on an outer side of the manipulator for wiring the electric wire for supplying current to the coil of the mover moving linearly in the vertical direction.

The manipulator of the present invention is composed of a plurality of combinations, each of the actuators of the combined form can be configured to reciprocate integrally connected integrally with each other.

On the other hand, the breaker according to the present invention is connected to the mover of the manipulator according to claim 1 or 2 to an insulated operating rod for the operation of the breaker, and to perform the closed pole operation and the opening operation by the linear reciprocating motion of the mover. It is a technical feature to carry out.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2A to 2G show the configuration of a manipulator according to a preferred embodiment of the present invention.

As shown in Figure 2a to 2g, the manipulator 100 according to the present invention, including a fixed iron core 110, the fixed iron core 110 is made of a magnetic material to form the entire outer shape of the manipulator, up and down Direction and two passages 111 penetrating in the front-rear direction while having a predetermined length, and the intermediate wall 112 is formed in the middle by the two passages 111. In the embodiment shown in the drawings, the fixed iron core 110 exemplifies a shape made of a hexahedron, but the fixed iron core 110 of the present invention is not necessarily limited to the shape shown in the drawings and the side wall of the cylinder It can be comprised in various forms, such as an open form.

The outer main permanent magnet 200 and the inner main permanent magnet 300 are installed on both wall surfaces of the passages 111 formed on the fixed iron core 110, respectively. Here, only the one of the outer main permanent magnet 200 and the inner main permanent magnet 300 may be installed. This will be described later as another embodiment of the present invention with reference to FIGS. 7A and 7B.

In addition, the two passages 111 of the fixed iron core 110 are wound in a direction orthogonal to the outer main permanent magnet 200 and the inner main permanent magnet 300 while the middle wall 112 is centered ( The mover 400 having the coil 410 is wound linearly in the longitudinal direction (up and down in the drawing) of the passage 111 between the outer main permanent magnet 200 and the inner main permanent magnet 200. It is installed as possible. Therefore, when the current in the forward or reverse direction is supplied to the coil 410, the magnetic field by the outer and inner primary permanent magnets (200, 300) and the electromagnetic repulsion force by the current density of the coil 410 The mover 400 having the coil 410 is linearly reciprocated in the up and down directions.

In the specific embodiment shown in the drawings, the movable element 400, the first magnetic body 420 and the second magnetic body 430 are disposed on the upper and lower ends of the coil 410, respectively, It may be configured in a form integrated with the coil 410. Integrating the coil 410 and the first and second magnetic bodies 420 and 430 may be implemented by embedding the coil 410 and the first and second magnetic bodies 420 and 430 in the housing 440 of the nonmagnetic material. This can be easily implemented by molding the exterior with the coil 410 and the first and second magnetic bodies 420 and 430 as the centers.

In addition, as shown in the embodiment, the outer and inner primary permanent magnets (200, 300) at both ends (upper and lower ends of the drawings), respectively, the first outer, inner auxiliary permanent magnets 500, 600 And second outer and inner auxiliary permanent magnets (550,650) may be installed.

In this case, polarities of the first outer and inner auxiliary permanent magnets 500 and 600 and the second outer and inner auxiliary permanent magnets 550 and 650 are opposite to the polarities of the outer main permanent magnet 200 and the inner main permanent magnet 300. (See FIG. 2E). Then, the direction of the magnetic force lines generated between the first outer, inner auxiliary permanent magnets (500, 600) and the magnetic lines of force generated between the second outer, inner auxiliary permanent magnets (550, 600), the outer primary permanent magnet (300) Opposite the direction of the line of magnetic force generated between the inner main permanent magnet (200). By doing so, when the movable member 400 is moved upward in the drawing, the first magnetic body 420 is held by the magnetic force of the first outer and inner auxiliary permanent magnets 500 and 600, and thus the coil 410 is held. Even if the supply of current is cut off, the mover 400 can continue to be moved upward. Similarly, when the movable member 400 moves downward, the second magnetic body 430 is held by the magnetic force of the second outer and inner auxiliary permanent magnets 550 and 650 to transfer current to the coil 410. Even if the supply is cut off, the mover 410 can continue to move downward.

The size (height) of the first and second magnetic bodies 420 and 430 may be configured differently according to the holding force of the driven element such as a circuit breaker. For example, there may be a difference depending on the difference between the holding force required to continuously maintain the closed state of the breaker and the holding force required to continuously maintain the open state.

In addition, in a preferred embodiment of the present invention, the guide shaft 450 may be extended on one side of the movable member 400 exposed to the outside of the fixed iron core 110 (see FIGS. 2B and 2G). . In addition, a guide 700 for guiding the linear movement of the mover 400 is installed at a point adjacent to the fixed iron core 110 by allowing the guide shaft 450 of the movable element 400 to be linearly moved. Can be. The guide shaft 450 of the movable member 400 moves along the guide groove 710 formed in the guide 700. As described above, since the linear reciprocating motion of the mover 400 is guided by the guide shaft 450 and the guide 700, the left and right flow of the mover 400 is prevented, so that the sidewalls of the passages 111 In addition, the inner main permanent magnets (200,300) in contact with it is possible to move stably and accurately without problems such as friction loss. In the embodiment shown in FIG. 2G, the guide shaft 450 and the guide 700 are simply guided by a flat shaft and a straight hole, but the present invention is not limited thereto. For example, a linear motion guide or the like such as a known dove tail guide structure may be applied.

In addition, in the preferred embodiment of the present invention, at the end of the movement of the mover 400 in the longitudinal direction of the passage 111, the mover 400 is to move the upper and lower ends of the passage 400 In order to prevent impact from hitting the fixed iron core 110, first and second buffer members 811 and 812 may be installed at upper and lower ends of the passage 111, respectively. In the embodiment shown in the drawings, the first and second buffer members 811 and 812 are in the form of compression coil springs, but the present invention is not limited thereto, and an impact damping means such as a pneumatic or hydraulic damper may be applied. have. In addition, instead of installing the first and second shock absorbing members 811 and 812 at the inner ends of the passages 111 of the fixed iron core 110 as shown in the drawings, the upper and lower ends of the movable member 400 may be installed. Alternatively, it may be installed outside the fixed iron core (110).

3A to 3D show a preferred example of the manipulator according to the present invention in a form suitable for connecting to an external driven part such as a breaker.

As described above, in the manipulator 100 according to the present invention, the mover 400 having the coil 410 is linearly reciprocated up and down to drive external driven parts such as a circuit breaker. Here, in order to connect the mover 400 to the breaker, the mover 400 may be directly connected to the breaker, or the like, as shown in FIGS. 3A to 3C. The support frame 460 is fixed, and the support frame 460 of the nonmagnetic material may be provided with a connection portion 461 for connecting to a connection such as an insulating operation rod 25 (see FIG. 3D) of the circuit breaker.

In addition, the support frame 460 of the nonmagnetic material may be configured such that the up and down movement is stably performed by the linear guide mechanisms 462 and 463 on the fixed iron core 110.

The fixed iron core 110 further extends its rear end portion, and forms the guide groove 710 for guiding the guide shaft 450 of the movable member 400 directly in the extended portion. May be substituted for 700.

And, in the present embodiment, a cable veyor (910) known on the outer side of the manipulator for wiring the wire 900 for supplying a current from the outside to the coil 410 of the mover 400 It is desirable to install. The cable bayer 910, one end thereof is fixed to a separate bracket 920, the other end is fixed to the support frame 460, while naturally bending while bending along the up and down linear reciprocating motion of the support frame 460 Can follow. In the embodiment shown in the figure, the wire 900 extending from the external power supply is installed in the cable bayer 910 and penetrates the support frame 460 to the coil 410 of the mover 400. Has a structure that is connected to The reason why the cable bayer 910 can be used in this way is that the manipulator 100 in which the manipulator 100 according to the present invention penetrates the fixed iron core 110 back and forth is formed, and has a coil 410. 400) is configured to be exposed to the outside. Therefore, even if the cable bayer 910 is not used as described above, the wiring of the wire from the outside is convenient, and when the cable bayer 910 is applied, the wire 900 is arranged in a more convenient and well-aligned state. It can be good, there is an advantage that can be adapted to the movement of the mover 400 and the support frame 460 without difficulty. On the other hand, in the related art, since coils are disposed inside the outer cylinders, which are blocked on all sides, it is difficult to wire the inner cylinders, and the wires are easily subjected to fatigue due to repeated compression and tension according to the linear movement of the coils. There were many problems such as disconnection. This conventional problem, as described above, by opening the passage 111 penetrating back and forth to the fixed iron core 110, by installing the coil 410 and the mover 400 in the passage 111 penetrated back and forth This is solved by the configuration such that the mover 400 is exposed to the outside.

3D shows a circuit breaker having the manipulator 100 according to the present invention connected to the breaker 100 of the present invention. The circuit breaker illustrated in FIG. 3D is different from the circuit breaker and the manipulator part described above with reference to FIGS. 1A and 1B, and the other parts have the same configuration. 3d shows when the breaker remains closed.

As shown in FIG. 3D, in the circuit breaker according to the present embodiment, an operation rod 60 is connected to the insulating operation rod 25 of the circuit breaker by a connecting pin 61, and the operation rod 60 is described above. It is connected to the connecting shaft 461 formed on the support frame 460 of the manipulator 100. If the embodiment is not provided with the support frame 460 to the mover 400, the operating rod 60 may be directly connected to the mover 400 in the same manner.

According to such a connection structure, the insulation manipulation rod 25 is driven by the up and down linear reciprocating motion of the support frame 460, that is, the up and down linear reciprocating motion of the mover 400 to perform the closing and opening operation. do.

Manipulator 400 having the coil 410 by the magnetic field by the permanent magnets (200,300) and the electromagnetic repulsion force by the current density of the coil 410 by applying the Fleming's left-hand rule applied as described above ) Is a new type of manipulator (EMFA) that uses electromagnetic force to linearly reciprocate. That is, when a current in the forward or reverse direction is applied to the coil 410, the coil 410 is moved in the up and down directions by the magnetic field of the main permanent magnets 200 and 300 and the electric field of the coil 410. Force is at work Accordingly, the mover 450 in which the coil 410 is integrated is moved up and down, thereby driving an external operating element such as a circuit breaker connected to the mover 450.

On the other hand, as described above, the manipulator 100 according to the present invention flows a current in the direction perpendicular to the magnetic field to the coil 410 in the space in which the magnetic field formed by the permanent magnets (200, 300) is formed to the coil 410 It has the principle of imparting a force moving in the axial direction.

The general PMA manipulator described in the prior art part is a system that moves the mover by the force of the magnetic field generated from the permanent magnet and the force of the magnetic field generated by passing a current through the coil, so that the path of the magnetic field must be made of the magnetic material. Rather, the movable mover must also be made of magnetic material.

Therefore, in order to obtain a larger operating force in the PMA manipulator, a large amount of current must be applied to the coil. Even if the current is continuously increased due to the saturation problem of the magnetic material, the operating force beyond a certain limit cannot be obtained. In order to solve such a problem, the size of the magnetic material must be increased, so that the manipulator becomes too large, and the magnetic flux density excited by the permanent magnet and the coil current is inversely proportional to the square of the pore distance. There is a limit to the application of this large high voltage and ultra high voltage circuit breaker.

(J : 전류밀도, B : 자속밀도)를 얻는 원리를 가진다. However, the manipulator of the present invention applies Fleming's left-hand rule to flow a current in a direction perpendicular to the space where the magnetic field is formed, thereby applying a force to the mover.

(J: current density, B: magnetic flux density).

As described above, the magnetic field of the conventional permanent magnet causes a saturation problem of the magnetic body, and the magnetic flux density is greatly influenced by the pore distance. However, the manipulator 100 according to the present invention forms a current density by the current of the coil 410 in the vertical direction of the magnetic field in a state in which a magnetic field is formed in the coil 410 portion by the permanent magnet. Since the electron repulsion force is used by the left hand law of the system, the amount of current flowing in the coil 410 is directly converted into a force. Therefore, when a large amount of current flows through the coil 410, a larger force can be obtained by that amount.

Therefore, in the manipulator 100 of the present invention, the electromagnetic force generated from the magnetic field excited by the current of the coil 410 does not use the force applied to the air gap, but the electromagnetic repulsive force due to the external magnetic flux density and the current density in the coil 410 region. Since it is operated by the magnetic force, it is not necessary to think about the saturation problem of the magnetic body in the place where the electromagnetic force is applied, and only the number of turns of the coil 410 is rolled up and a larger operating force can be obtained simply by increasing the strength of the current, so that the size of the manipulator And the weight can be greatly reduced. In other words, you can get very large operating force compared to size and weight.

On the other hand, the conventional PMA manipulator must allow sufficient magnetic flux density to be formed in the gap between the mover and the iron core (stator). Since the magnetic flux density is inversely proportional to the square of the distance between the voids, a large amount of coil current needs to flow in order to form a sufficient magnetic flux density. Therefore, the reactivity, that is, the initial operating speed is bound to be slow. However, since the manipulator according to the present invention is supplied with a current to the coil 410 and generates an electromagnetic repulsion force with an external magnetic field, the initial speed is very fast and powerful.

In addition, as described above, the manipulator according to the present invention has a passage 111 penetrating in the front-rear direction to the fixed iron core 110, such that the mover 400 having the coil 410 is outside the passage 111. Because it is configured to be exposed to, the wiring of the electric wire from the outside to the coil 410 is easy, the wire 900 is not twisted during operation, or excessive force is not applied to the wire 900.

In addition, the conventional electromagnet manipulator (EMFA) has a movable shaft or a connecting shaft from the movable member in order to connect the movable member to the inside of the hollow inner and outer cylinders in which all four sides are blocked. In addition to the long extension in the direction, the length of the extension must be considerably longer to sufficiently secure the moving distance of the mover. Considering the increase in the number or to use a large diameter of the manipulator had a disadvantage that the heavy.

However, according to the present invention described above, a passage 111 penetrating back and forth in the fixed iron core 110, so that a part of the mover 400 is exposed to the outside of the fixed iron core 110, the movable exposed to the outside Since an external operating element such as a circuit breaker can be directly connected to the ruler 400, the size (height) of the manipulator can be significantly reduced. In addition, since the mover 400 has a structure that is guided by the guide shaft 450 and the guide 700, the operation is made stable, there is no need for a connecting shaft, a moving shaft, etc., considering their rigidity There is no need to.

In addition, conventionally, since the coil and the mover are simply arranged between the inner and outer permanent magnets without any guide means, when the coil and the mover move in the axial direction, friction occurs with the inner and outer permanent magnets. Manipulation loss or movement was not smooth.

However, according to the manipulator according to the present invention, the mover 400 has a structure guided by the guide shaft 450 and the guide 700, and furthermore, the support frame integrated with the mover 400 ( Since the 460 has a structure guided by the linear guide mechanisms 462 and 463, the operation is made very stable, and thus a manipulator having little mechanical friction or loss of operating force is realized.

In addition, the conventional electromagnet manipulator, both the inner and outer permanent magnets and the auxiliary permanent magnets should be made cylindrical, because it is difficult to make a permanent magnet in one cylindrical shape, it is actually made of several pieces in the circumferential direction Then there was a difficulty in placing the several pieces inside the fixed iron core.

However, according to the manipulator according to the present invention, the fixed iron core 110 and the permanent magnets (200, 300, 500, 550, 600, 650,) can be configured in a flat plate type, there is an advantage that the production is simple and simple structure.

An operation process of the manipulator of the present invention as described above will be described in detail with reference to FIGS. 4A to 4D. It is assumed that the manipulator 100 according to the present invention is applied to the breaker shown in FIG. 3D.

4A illustrates a state in which the mover 400 is moved upward to the top of the drawing, that is, toward the first outer and inner auxiliary permanent magnets 500 and 600. Accordingly, the operation rod 60 (see FIG. 3D) is pushed up by the mover 400 as much as possible to keep the breaker closed.

Here, the direction of the magnetic force lines of the outer, inner primary permanent magnets (200, 300) is an arrow m1, the direction of the magnetic lines of the second outer, inner auxiliary permanent magnets (550, 650) is an arrow (m2), and the first outer, inner The direction of the lines of magnetic force of the auxiliary permanent magnets 500 and 600 is indicated by arrows m3. As shown in FIG. 4A, when the mover 400 is moved upward and the circuit breaker maintains the closed state, the coil 410 of the mover 400 cuts off the supply of current. The first magnetic body 420 of the mover 400 serves as a flow path of the magnetic force lines generated in the outer and inner primary permanent magnets 200 and 300 and the first outer and inner auxiliary permanent magnets 251 and 252. At the same time, since the first magnetic body 420 is already biased toward the first outer and inner auxiliary permanent magnets 500 and 600, a force (magnetic force) caused by the magnetic field of the first outer and inner auxiliary permanent magnets 500 and 600 is determined by the first magnetic body 420. It extends to the magnetic body 420. This force acts as a holding force for holding the first magnetic body 420 so that the movable member 400 can be continuously moved on the drawing. Thus, the breaker can continue to maintain the closed state. As a result, the first outer and inner auxiliary permanent magnets 500 and 600 and the first magnetic body 420 of the mover 400 may supply a current to the coil 410 or may not have a separate locking mechanism. It is to play a role to hold 400.

In the above state, the movable member 400 does not rise above a certain limit by the elastic pressing force of the first buffer member 811 and the holding force and the first by the first and inner auxiliary permanent magnets 500 and 600. The elastic restoring force of the shock absorbing member 811 stops at the point of equilibrium.

In this state, when an abnormality occurs in the power system, a current is supplied to the coil 410 to open the circuit breaker. Then, the repulsive force (force acting downward in the drawing or axial force) acts on the relationship between the magnetic flux density generated between the outer and inner main permanent magnets 200 and 300 and the current density generated by the coil 410. The coil 410 is moved downward. That is, the mover 400 in which the coil 410 is integrated is moved downward. In this case, the current supplied to the coil 410 is supplied to a value that can sufficiently overcome the holding force of holding the first magnetic body 420 by the first outer and inner auxiliary permanent magnets 500 and 600 in the closed pole state. do.

In this way, when the mover 400 is lowered to the position shown in FIG. 4B, the axial movement force due to the repulsive force acting on the coil 410 and the inertial force that the mover 400 moves to is the first magnetic body 420. Since much greater than the force to pull up), the mover 400 can continue to move downward. In this case, the second magnetic material 430 enters the second outer and inner auxiliary permanent magnets 550 and 650 and is generated from the outer and inner main permanent magnets 200 and 300 and the second outer and inner auxiliary permanent magnets 550 and 650. It acts as a flow path of magnetic lines. Accordingly, the force of the second outer and inner auxiliary permanent magnets 550 and 650 to pull the second magnetic body 430 downward gradually increases, and the mover 400 is accelerated by receiving a larger force downward. This is when the manipulator 100 exerts the greatest force. Therefore, it is desirable to design this time to coincide with the point at which the gas repelling force (the force that should pull the popper cylinder 24 in the direction against the fixed piston 14 in FIG. 3d) at the contact portion of the breaker becomes maximum.

As such, as the speed of the mover 400 continues to increase and passes the point shown in FIG. 4B, the current supplied to the coil 410 is rapidly cut off. Then, the mover 400 is moved only by the inertia force and the force of the second outer and inner auxiliary permanent magnets 550 and 650 pulling the second magnetic body 430 downward.

In this way, when the movable element 400 is lowered to the position of FIG. 4C, the second outer and inner auxiliary permanent magnets 550 and 650 push the second magnetic body 430 in the reverse direction (upward) in the moving direction. That is, from the time when the second magnetic body 430 of the movable member 400 passes through the axial middle point of the second outer and inner auxiliary permanent magnets 550 and 650, the force is applied in a direction opposite to the moving direction of the movable member 400. This causes the mover 400 to brake. At this time, since the opening operation has already been completed at the contact point of the breaker, the greater the braking force, the lower the end of the mover 400 hits the inner end of the passage 111 of the fixed iron core 110, thereby causing a problem. Mechanical stabilization can be obtained. However, since the mover 400 is actually designed to move at a very large speed of 6 m / s or more, the mover 400 may collide with the fixed iron core 110 through the second outer and inner auxiliary permanent magnets 550 and 650. There is. In this case, the mover 400 may be stably decelerated by the second buffer member 812.

At the end of the operation in which the mover 400 moves downward, typically, the mover 400 is pushed in the opposite direction of movement by the second buffer member 812 and the second outer and inner auxiliary permanent magnets 550 and 650. The force is larger than the holding force of holding the second magnetic body 430 by the second inner and outer auxiliary permanent magnets 255 and 256.

Then, as shown in Figure 4d, the mover 400 is raised up by the restoring force of the second buffer member 812. As a result, the movable member 400 stops at the point where the elastic restoring force of the second shock absorbing member 812 and the holding force of the second magnetic body 430 by the second outer and inner auxiliary permanent magnets 550 and 650 are balanced. do. This is the state in which breaker opening is completed.

5A to 5C show examples of integrating a plurality of manipulators according to the present invention, and show that the manipulators may be combined to combine a plurality of manipulators in a single motion.

In this case, each of the movers 400, although not shown, is configured to be connected integrally by a separate member to the same movement. The integrated connection form of the movers 400, as described above in Figures 3a to 3c can be applied to extend the member such as the support frame 460 to suit the entire mover 400.

In addition, the front manipulators 100a and 100b may share the guides 700a and the rear manipulators 100c and 100d respectively corresponding thereto. In this case, instead of arranging several manipulators adjacent to each other, as shown in the drawing, the front manipulators 100a and 100b and the rear manipulators 100c and 100d are each integrated with a single magnetic body ( 110a), it is also possible to configure by opening the passage (111) for installing the movable element 400 in each of the front and rear integrated magnetic material (110a). In addition, the guide 700a is also composed of a single integrated member (in the figure is composed of a separate member), there are formed a plurality of guide grooves 710 for guiding the movers 400 therein. It can also be configured in one form.

In this way, when several manipulators are merged, the operation force can be increased by merging them. Therefore, the number of manipulators to be combined may be increased or decreased in accordance with the breaking capacity.

6A and 6B are front cross-sectional views showing examples of the manipulator according to another embodiment of the present invention.

First, the manipulator 100a using the electromagnetic force illustrated in FIG. 6A is, in the manipulator 100 according to the embodiment disclosed in FIGS. 2A to 2G, the outer main permanent magnet 200 and the first main magnet 200 in each passage 111. 2, the outer auxiliary permanent magnet (500, 550) is installed only, the inner main permanent magnet 300 and the first, second inner auxiliary permanent magnet (600, 650) in the form of a manipulator showing that it can also be configured. The magnetic force of the outer main permanent magnet 200 extends to the middle wall 112 of the fixed iron core 110, so that there is no problem in the reciprocating motion of the mover 400. However, assuming that the manipulator is the same size, the electromagnetic repulsive force (axial force) generated in the mover 400, that is, the coil 400, is smaller than when the inner main permanent magnet 300 is together.

In addition, the manipulator 100b using the electromagnetic force shown in FIG. 6B has an inner main permanent magnet 300 and a first and second inner auxiliary permanent magnet in each passage 111, as opposed to the manipulator 100 a shown in FIG. 6A. It is in the form of a manipulator showing that only the (600,650) can be installed and the outer main permanent magnet 200 and the first and second outer auxiliary permanent magnets 500 and 550 can be configured without. In this embodiment, there are no upper and lower buffer members 811,812 (see Fig. 6A). If the shock absorbing members 811 and 812 are not provided, a separate impact damping means may be installed in the guide portion 450 of the mover 400.

Although specific embodiments of the present invention shown in the accompanying drawings have been described in detail above, this is merely an example of a preferred embodiment, and the protection scope of the present invention is not limited thereto. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other embodiments by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and equivalent other embodiments are It goes without saying that it belongs to the appended claims of the invention.

In addition, in the accompanying drawings of the present invention, the breaker is illustrated as an example of the gas breaker of the paper arc type method, the present invention can be applied to any other driven element such as a vacuum breaker, an oil breaker or other operating elements, In the case of application, it can be usefully applied to all low voltage ultra high voltage circuit breakers.

As described above, the manipulator (EMFA) using the electromagnetic force according to the present invention has a structure for operating the mover by the magnetic field due to the permanent magnet and the electromagnetic repulsion force due to the current density of the coil, the large operating force and even small size and weight It is a manipulator capable of exhibiting an operation speed.

In particular, the manipulator using the electromagnetic force according to the present invention, one side of the mover is exposed to the outside of the fixed iron core, it is easy to connect the wire for supplying current to the coil from the outside to the exposed portion, it is also easy to manufacture. In addition, since the electric wire is directly connected to the mover from the outside, there is almost no problem such as an excessive force on the electric wire due to the movement of the mover.

In addition, since the mover can be directly connected to the breaker, it is possible to reduce the height or size of the manipulator, it is easy to integrate by connecting the exposed mover, it is possible to easily implement a form incorporating multiple manipulators.

In addition, since it has a structure for guiding the linear movement of the mover by the guide, the operation is made stable, reducing driving loss and improving quality and reliability.

Claims (11)

It is made of a magnetic material to form the entire outer shape of the manipulator, and has a fixed length in the vertical direction and two passages penetrating in the front and rear direction, and having a fixed iron core having an intermediate wall formed in the middle by the two passages and, Permanent magnets are disposed on one or more wall surfaces of both walls of each of the two passages of the fixed iron core, The two passages of the fixed iron core have a coil wound in a direction orthogonal to the permanent magnet with the middle wall in the middle thereof, the left and right sides penetrating the passageway, and the front and rear sides thereof being exposed to the outside. When a current in a forward or reverse direction is supplied, a movable element is installed to linearly reciprocate in the longitudinal direction of the passage in which the permanent magnet is disposed by the magnetic field caused by the permanent magnet and the electromagnetic repulsion force by the current density of the coil. Manipulator using electromagnetic force. It is made of a magnetic material to form the entire outer shape of the manipulator, and has a constant length in the vertical direction and two passages penetrating in the front and rear direction, and has a fixed iron core having an intermediate wall formed in the middle by the two passages and, On both wall surfaces of each of the two passages of the fixed iron core, outer main permanent magnets and inner main permanent magnets in the form of flat plates are disposed, respectively. The two passages of the fixed iron core are wound in a direction orthogonal to the outer main permanent magnet and the inner main permanent magnet, with the middle wall in the middle thereof, and both left and right sides thereof pass through the passage between the inner and outer main permanent magnets. Both front and rear sides have a coil exposed to the outside, and when the current is forward or reversely supplied to the coil, the inner and outer sides are caused by the magnetic field by the inner and outer main permanent magnets and the electromagnetic repulsion force by the current density of the coil. Manipulator using an electromagnetic force, characterized in that the mover is installed to reciprocate linearly in the longitudinal direction of the passage between the main permanent magnets. The method of claim 2, The upper and lower ends of the inner and outer permanent magnets, the first inner and outer auxiliary permanent magnet and the second inner and outer auxiliary permanent magnet, respectively, characterized in that the manipulator using an electromagnetic force. The method of claim 3, The direction of the polarity of the first inner, outer auxiliary permanent magnets and the second inner, outer auxiliary permanent magnets are arranged in a direction opposite to the direction of the polarity of the inner, outer main permanent magnets. The method according to claim 1 or 2, The mover is an actuator using an electromagnetic force, characterized in that the first magnetic body and the second magnetic body are disposed at the upper and lower ends of the coil, respectively, and the coil and the first and second magnetic bodies are integrated. The method of claim 5, The coil and the first and the second magnetic body is embedded in the housing of the non-magnetic material to operate the manipulator using the electromagnetic force, characterized in that to form the integrated mover. The method according to claim 1 or 2, Guide shafts are formed to extend to the outside of the fixed iron core of the mover, And a guide for guiding linear movement of the mover, the guide shaft of the mover being coupled to the linear position at a position adjacent to the fixed iron core to guide the linear movement of the mover. The method according to claim 1 or 2, At the end of the longitudinal movement relative to the passage of the mover, the first and second buffer members are respectively provided at the upper and lower ends of the passage to prevent the mover from impacting the fixed iron core forming the upper and lower ends of the passage. Manipulator using electromagnetic force characterized by. The method according to claim 1 or 2, Manipulator using an electromagnetic force, characterized in that the cable bayer is provided on the outer side of the manipulator for the wiring of the electric wire for supplying current to the coil of the mover linearly moving in the vertical direction. The method according to claim 1 or 2, The manipulator is made of a combination of several, the manipulator using the electromagnetic force, characterized in that each of the actuators of the manipulators constituting the combined form are configured to reciprocate integrally connected to each other integrally. An insulated operating rod for operating the breaker is connected to the mover of the manipulator according to claim 1 or 2, wherein the breaker operation and the opening operation are performed by the linear reciprocating motion of the mover. .

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