KR100625524B1 - The magnetic actuator of vacuum circuit breaker with medium voltage - Google Patents

Abstract

The present invention relates to a magnetic actuator applied to the medium voltage class.

The magnetic actuator for the medium-voltage breaker of the present invention includes a driver for performing a linear reciprocating motion in a driving space inside the body; Permanent magnets are installed on both sides of the drive space inside the main body to maintain the movement of the driver; In the magnetic actuator applied to the circuit breaker comprising an injection coil and an open coil installed above and below the permanent magnet to drive the driver in the input and open state, respectively by the applied current,

A solid magnetic body that increases speed and force when the driver inserts and opens the drive space up and down;

A solid edge magnetic material adding a line of magnetic force between the permanent magnet and the input and open coils; And

By being positioned above the driver, there is a technical feature to further comprise a groove for reducing the fixing force according to the maintenance of the opening and collecting the magnetic flux toward the solid corner magnetic material.

Therefore, the magnetic actuator applied to the medium-voltage class circuit breaker of the present invention is designed to have a closing time of about 2.5 times shorter than the conventional actuator, and it is possible to implement a circuit breaker having a simple structure by simplifying peripheral electronic devices in driving the actuator. It was made. In addition, the low current consumption for the drive power supply is designed, and the voltage rating range (17 to

The modularity of the manipulator was implemented for the classification of 38kV), and the reliability of the manipulator was further increased to produce a breaker manipulator that can be used as a medium voltage class.

Magnetic, Manipulator, Solid, Magnetic, Corner, Groove

Description

Magnetic actuator of medium voltage breaker {The Magnetic actuator of vacuum circuit breaker with medium voltage}

1 is a cross-sectional view showing the operating principle of the vacuum circuit breaker of the present invention.

Figure 2 is a cross-sectional view showing the input state of the magnetic actuator of the present invention

3 is a cross-sectional view showing an open state of the magnetic actuator of the present invention.

Figure 4 is a cross-sectional view showing the path to the opener of the magnetic actuator of the present invention.

Figure 5 is a cross-sectional view showing a path to the input of the magnetic actuator of the present invention.

6 is a magnetic flux simulation of the open state according to the present invention

7 is a simulation of the magnetic flux in the open state when the current is applied to the input coil according to the present invention

8 is a magnetic flux simulation of the input state according to the present invention

Figure 9 is a magnetic flux simulation of the input state when applying the current to the open coil according to the present invention

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

101, 102: magnetic material 103: upper solid magnetic material

104: lower solid magnetic material 105: open coil

106: input coil 107: driver

108, 109: permanent magnet 110: drive space

120: upper solid magnetic corner 121: lower solid magnetic corner

122: home

The present invention relates to a magnetic actuator for a medium voltage circuit breaker, and more particularly, in driving a main body driver made of a magnetic body having a driving space formed therein, the permanent magnet being provided on both sides of the driver for driving the driver. When the current flows in the coils positioned above and below the permanent magnet, the driver starts driving by the generated magnetic force lines. It relates to a magnetic actuator for the medium-voltage breaker further comprises a solid magnetic material and the solid magnetic material corner and the groove in the upper portion of the driver for the rapid drive of the driver.

The breaker is a device that can open and close the normal current when there is no fault in the converter, and open and close even when abnormally large current flows due to a fault such as a short circuit. Therefore, the circuit breaker in the transmission line or the receiving end of the transmission line plays the most important role. Especially, when the voltage is high and the capacity of the power supply is high, the current is very large when the power supply line has a high capacity. It is a technically very difficult device requiring accuracy. The principle of disconnecting the electric current is to install the fixed contactor and the movable contactor so as to be in close contact with each other to flow the current, and when a large current flows due to a fault somewhere in the line, the movable contactor is quickly disconnected from the fixed contactor to disconnect the current. At this time, an arc is generated between the two contacts. The removal of the arc is a key factor, and a conventional circuit breaker for removing the arc is largely a vacuum circuit breaker method and a gas. Gas circuit breaker type and air circuit breaker type are classified. Recently, medium voltage class breaker has improved the performance of vacuum breaker. Reduced 10-20 mm breakers are being developed.

Conventional magnetic actuators are only used when the voltage capacity of the circuit breaker is 25.8 kV. However, in order to extend the range of application to the 38kV class, manipulators with large operation force and input holding power according to modularization should be implemented. The 38kV applied manipulator is spring type and the operating distance is about 25mm including the pressure point distance.

In order to modularize the 25.8kV magnetic manipulator and apply it to 38kV, first, it is necessary to know the pressure point required by the breaker for each grade. The breaker of the 25.8kV circuit breaker, which is used only for the voltage of the manipulator, requires an average pressure of about 230 kg each, so a three-phase collective manipulator must be used. This weight should be at least 600 kg and the operating force at least 690 kg.

Each imaginary pressure point of the 38kV breaker ranges from 330kg to 570kg, which is about twice the pressure point of the magnetic actuator for 25.8kV. Therefore, in order to modularize the existing magnetic manipulator to be applied to the 38kV class, the manipulator for 25.8kV must be installed independently in each phase to be driven. However, if the manipulator is installed for each phase, there is a drawback in that it takes a lot of installation space and causes complexity of the drive drive due to structural problems. While the conventional 25.8 kV magnetic manipulator has an operation distance of 20 mm, the operation distance of the 38 kV breaker is 25 mm, and thus it is difficult to apply the 25.8 kV manipulator to the 38 kV manipulator.

In addition, among the actuators used in the vacuum circuit breakers, the magnetic actuators are designed to be applied only when the driving distance of the driver is 20 mm or less, thereby limiting the operating force and difficult to apply them to other circuit breakers such as gas circuit breakers or air circuit breakers. It is a disadvantage.

Therefore, the present invention is to solve all the disadvantages and problems of the prior art as described above, in order to increase the operating force was made up to 50mm, more than twice the existing drive distance, the solid magnetic material and the magnetic corners and the driver on the top of the driver It is designed to have an appropriate cut-off speed of less than 1/2 of the existing one in terms of performance while additional grooves are provided in the groove. And the modularity of the manipulator was implemented for the division of the voltage class range (17 ~ 38kV), and at 38kV, it was designed as a three-phase batch manipulator, and the size of parts was significantly reduced, and it was designed as a compact structure that takes up less space. The aim is to provide a modular magnetic circuit breaker that can be used at medium voltage levels with higher reliability.

The present invention to achieve the object as described above, the driver 107 for linear reciprocating motion in the drive space inside the main body (101, 102); Permanent magnets (108, 109) are installed on both sides of the drive space inside the main body to maintain the movement of the driver; And an input coil and an open coil configured to drive the driver in an input state and an open state by an applied current installed above and below the permanent magnet. Solid magnetic material that increases speed and force when the driver inserts and opens; It is further provided with a solid corner magnetic material that adds a line of magnetic force between the permanent magnet and the input and the open coil and the groove 122 to reduce the holding force according to the maintenance of the opening and to collect the magnetic flux toward the solid corner magnetic material By providing a magnetic actuator for a medium-voltage class circuit breaker, it has been invented to have a closing time about 2 times or more shorter than the conventional actuator.

In addition, it is possible to implement a simple structure through the simplification of the peripheral electronic device in driving the manipulator, and to design a low current consumption for the driving power source. In addition, it is designed to be used as a modular of the operation unit for the classification of the voltage class range (17kV ~ 38kV), so that it can be applied to vacuum circuit breaker, gas circuit breaker, air circuit breaker, spring circuit breaker.

Details of the above object and technical configuration of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, Figure 1 shows the operation principle of the medium-voltage class circuit breaker, the medium voltage circuit breaker of the present invention is composed of a circuit breaker 56 applying the vacuum breaking method and an electromagnet manipulator 54 using a permanent magnet. The circuit breaker is composed of a vacuum interrupter 50, an insulating rod 51, a pressure point spring 52 for maintaining the contact pressure force of the vacuum interrupter, and a single shaft, so that the assembly is simple, the required number of parts is small, and the space is secured. Is easy. Moreover, the operation part 55 which drives a interruption | block part is connected by the drive shaft. Manipulator force required by the breaker of the breaker is applied differently depending on the grade.

The operating force of the manipulator of the present invention was designed by increasing the driving distance of the operating unit twice in consideration of the frictional force of each of the movable electrode units, and the blocking unit and the operation period link were applied in a 1: 2 ratio. The hinge 53 is widely used. In general, the link method is a cam method, a rotary method, or a hinge method, and in the present invention, instead of increasing the driving distance of the operation unit for driving the breaker, the burden ratio for the contact pressure point required by the breaker is reduced and the coil is simultaneously applied. The focus is on designing for easy control by reducing current consumption in the system.

In addition, the modularization makes it possible to apply to other types of circuit breakers such as gas circuit breakers or air circuit breakers.

2 is a view illustrating an input state of the magnetic actuator 54 of the present invention, and includes a main body 101 and 102 having a driving space and a driver 107 moving a driving space, and having a groove 122 at the top of the driver. ) Is further provided, and permanent magnets 108 and 109 are attached to both sides of the driving space. The body is preferably made of a magnetic body. At both ends of the driver, a coil suitable for a contact pressure point required by the blocking unit and an appropriate breaking speed at which the manipulator is to be moved is configured to linearly move the driver 107 in the axial direction.

When a current is supplied to the input coil 106 or the open coil 105, a magnetic field is generated by the coil current, and the magnetic flux of the permanent magnets of the permanent magnets 108 and 109 is increased or decreased by the force of the coil flux. 107 makes a linear movement of feeding or opening in the axial direction. The driving space 110 was designed to adjust the distance between the manipulator spaces according to the stroke distance of the blocking unit, and here the distance of the driving space 110 was designed to 50 mm. In addition, the upper solid magnetic material 103 and the lower solid magnetic material 104 is configured to increase the appropriate speed and force when the driver is inserted and opened.

 The magnetic field formed in the input coil when the driver is injected increases the magnetic flux density on the lower solid magnetic body and at the same time the magnetic portion of the lower solid corner 121 also increases the magnetic flux density.

In addition, the magnetic force line of the lower solid corner magnetic material 104 is added to the magnetic force line between the open coil 105 and the input coil 106 to enable the driver to move within a short time, about two times or more than a conventional manipulator. It was invented to have a short dosing time. However, after the completion of the input, if the leakage flux in the direction of the lower solid edge magnetic material is generated, the holding force for maintaining the input state is reduced, it can not be maintained in the input state, immediately switching to the open state can lead to failure. However, this manipulator has a gap design between the driver and the lower solid edge and the fixed magnetic material outside to prevent leakage of magnetic flux toward the lower solid edge while collecting the magnetic force in the vertical direction of the lower solid magnetic material. Designed to maintain the magnetic flux generated in the conventional permanent magnet as it is.

Figure 3 shows the open state of the magnetic actuator of the present invention. The magnetic field formed inside the open coil 105 increases the magnetic flux density in the upper solid magnetic material 103 and also increases the magnetic flux density in the upper solid edge magnetic material 120. In addition, the magnetic force line of the upper solid edge magnetic material is added to the magnetic force line between the open coil and the input coil to enable the driver 107 to move in a short time, thereby having an opening time that is about two times shorter than that of a conventional manipulator. In addition, since the contact arc is generated when the first contact is opened to start the operation of the magnetic manipulator, the initial speed must be maintained at a certain level to minimize contact adhesion to the initial arc generation of the contact of the breaker.

In the manipulator of the present invention, an initial speed was increased by placing an upper solid corner magnetic material in an open coil, that is, in both driving spaces. When using high magnetic permeability magnetic material as another method to increase initial speed, initial saturation can be improved rapidly due to rapid saturation due to high permeability, but it is difficult to increase initial speed more than a certain amount, and expensive magnetic material There is a downside to using it. In addition, the closing force of all breakers is to maintain a fixing force that can overcome the contact pressure point and other frictional force of the breaker, but the holding force required by the manipulator when opening the breaker requires only minimal force. If the clamping force is strong when opening, the driver holding in the open state with the clamping force when the breaker is applied has the disadvantage of consuming more current to overcome the magnetic force of the permanent magnet.

Therefore, the manipulator is designed to reduce the fixing force according to the maintenance by making the groove 122 in the upper part of the driver. In addition, the groove is also responsible for collecting the magnetic force due to the change in the magnetic flux direction toward the upper solid corner magnetic material when the breaker is opened.

Figure 4 shows the path of the magnetic path in the open state shows the driving principle of the driver according to the formation of the magnetic lines of force of the coil and the magnet.

In order for the manipulator to be put in the open state, the magnetic force line path in the open state is held with the magnetic flux of the inherent permanent magnet 200 as shown. When the current 203 is supplied to the input coil in the above state, a magnetic field is formed in the input coil to generate the line speeds 201 and 202 by the coil inside and outside the iron core. However, one of the coil beams generated by the input coil 201 increases the magnetic flux density in the driving space and also increases the magnetic flux density in the lower solid body and the lower solid corner magnetic material. However, the stroke distance of the driving space is 50mm and cannot operate by space resistance, and the coil flux moved by the magnetic path of the upper magnet and the magnetic flux of the permanent magnet collide with each other. With the canceling effect, when the coil flux crosses the permanent magnet flux, the driver begins to move downwards, which is in the input state.

The operation of the open state in the input state of the manipulator is performed in the reverse order of the above-listed sequence. However, the size and design value of the manipulator are changed depending on how much the magnetic flux 302 of the permanent magnet in the input state can overcome the contact pressure and friction force in the open state.

 In order for the manipulator to be opened from the input state, first, the gyro path in the input state is holding with the magnetic flux of the unique permanent magnet as shown in FIG. 5. When the current 303 is supplied to the open coil in the above state, a magnetic field is formed in the open coil to generate the line speeds 300 and 301 by the coils in and out of the iron core. However, among the coil fluxes 300 and 301 formed by the input coil, the flux 300 increases the magnetic flux density in the driving space and increases the magnetic flux density of the lower solid magnetic material 104 and the lower solid magnetic material edge 121. However, the distance of the driving space is 50mm, which prevents the self-operation by space resistance, and when the lower magnetic field flux exceeds the magnetic field flux of the permanent magnet while supplying current to the input coil and at the same time, the driver is in an open state. Start moving upwards.

In addition, when moving from the open state to the open state, it is a state of holding the input state including the pressure point connected to the breaker, so that it can be opened with a small open coil flux to offset the magnetic flux of the permanent magnet in the previous input state. It is a big feature.

6 to 9 show the magnetic flux distribution inside the manipulator according to the present invention using the simulator Flux 2D more effectively than the magnetic flux distribution of FIGS. 4 and 5.

6 is a simulation of the magnetic flux in the open state according to the present invention, it can be seen that the magnetic flux density toward the upper solid magnetic material 103 in the open state is high.

7 is a simulation of the magnetic flux in the open state when applying the current to the lower input coil 106 in Figure 6, it can be seen that the magnetic flux density in the lower solid corner magnetic body 121 is very high compared to the area, for this reason The interior of the solid magnetic body 104 has an optimum magnetic flux density state, and helps the driver 107 to move faster earlier in the path of the magnetic flux having the optimal density state.

8 and 9 illustrate the magnetic flux inside the manipulator when a current is applied to the upper opening coil in the closing state and the closing state according to the present invention.

In the input state of FIG. 8, it can be seen from the distribution of the magnetic flux density of the lower solid magnetic material 104 that the magnetic flux is densely distributed to the lower solid magnetic material. In this state, when a current is applied to the upper open coil 105, a high density magnetic flux is first formed toward the upper solid edge magnetic material 120 as shown in FIG. 9 to help the driver 107 to move quickly.

In addition, as shown in Figures 6 to 9, in order to reduce the permanent magnet flux when opening the manipulator, a groove 122 is formed on the (open) side of the driver to optimize the magnetic flux per unit area. In addition, the direction of the vector potential of the permanent magnet flux is changed from the vertical direction to the horizontal direction so that the clamping force of the magnet can be naturally separated in the closing or opening state.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

Therefore, the magnetic actuator for the medium-voltage class circuit breaker of the present invention was manufactured up to 50 mm, which is more than twice the size of the conventional driving space, and the upper and lower solid magnetic bodies, the upper and lower solid corners, and additionally designed grooves in the upper part of the driver were used. The speed is more than twice as fast as a conventional manipulator. In addition, it is possible to implement a simple structure through the simplification and modularization of the peripheral electronic device in driving the manipulator, so that it can be applied not only to a vacuum circuit breaker but also to an air circuit breaker, a gas circuit breaker and a spring circuit breaker.

In addition, the low current consumption for the drive power supply further enhances the reliability of the voltage class (17 ~ 38kV) manipulator, making it a breaker manipulator that can be used as a medium voltage class.

Claims (5)

A driver performing a linear reciprocating motion in a driving space inside the main body; Permanent magnets are installed on both sides of the drive space inside the main body to maintain the movement of the driver; In the magnetic actuator applied to the circuit breaker comprising an injection coil and an open coil installed above and below the permanent magnet to drive the driver in the input and open state, respectively by the applied current, A solid magnetic body that increases speed and force when the driver inserts and opens the drive space up and down; A solid edge magnetic material adding a line of magnetic force between the permanent magnet and the input and open coils; And Positioned above the driver, the magnetic actuator for the medium-voltage breaker, characterized in that it further comprises a groove for reducing the fixing force according to the maintenance of the opening and collecting the magnetic flux toward the solid edge magnetic material. The method of claim 1, The main body is a magnetic actuator for a medium-voltage breaker, characterized in that made of a magnetic body. The method of claim 1, The driving space is a magnetic actuator for a medium voltage breaker, characterized in that less than 50mm. The method of claim 1, The solid magnetic material is a magnetic actuator for a medium-voltage breaker, characterized in that provided in the upper and lower driving space, respectively. The method of claim 1, The solid corner magnetic material is a magnetic actuator for a medium-voltage breaker, characterized in that provided between the open coil or the input coil and the drive space.

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