JP3179315B2 - Switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the separation of at least one set of members that are in contact with or close to each other, or the contact or close of at least one set of members that are separated from each other. By applying a force to one of the members, separating these members, or speeding up the movement to the proximity, and at the end of the operation of contact, or isolation, a support structure that supports the member that applied the force, or The present invention relates to an apparatus for reducing an impact force applied to a member that comes into contact with the member. In particular, the present invention relates to a switchgear having a pair of electrodes that can be freely contacted and separated, and capable of opening and closing by contacting or separating the electrodes.

[0002]

2. Description of the Related Art In a power system requiring a high-speed response, a switching device which responds at a higher speed and has a small impact force applied to the entire device at the time of opening or closing operation is required. Conventionally, in order to satisfy the above-mentioned demands, a switching device capable of opening and closing by using a magnetic repulsive force to contact and separate a pair of electrodes has been used. FIG. 16 shows a conventional switching device using electromagnetic repulsion. FIG. 16A is a diagram illustrating a state when the switchgear is turned on, and FIG. 16B is a diagram illustrating a state when the switchgear is opened. In FIG. 16, reference numeral 86 denotes a switch, and the switch 86 has a fixed electrode 9 inside a vacuum.
1. Movable electrode 90 and buffer member 95 such as bellows
The state in which the movable electrode 90 and the fixed electrode 91 are in contact with each other is referred to as turning on, and the state in which the movable electrode 90 and the fixed electrode 91 are separated by a predetermined distance is referred to as opening. Further, the buffer member 95 is provided to maintain the degree of vacuum of the switch 86 by the force applied to the movable electrode 90 when opening the opening / closing device, and to reduce the influence on the entire device. 88 is a coil. 8
Reference numeral 7 denotes a repulsion unit that generates an electromagnetic repulsive force on the coil 88 by passing a time-varying current through the coil 88. Reference numeral 89 denotes a movable conductive rod. A movable electrode 90 is attached to a tip of the movable conductive rod 89, and a repulsive portion 87 is attached to the movable conductive rod 89. Reference numeral 92 denotes a latch for holding the movable conductive rod 89. 93 is a contact pressure spring. 102 is a tie bar, 96, 97, 99, 100,
And 101 are fixing plates fixed to the tie bar 102. The switch 86 is fixed to the fixing plate 96. The coil 88 is fixed to the fixing plate 97. Fixing plate 99
Is fixed to one end of a contact pressure spring 93. Fixing plate 10
The latch 92 is fixed to 0. 94 is a coil 88
Is a coil presser for fixing the coil to the fixing plate 97. The coil retainer 94 has a function of mechanically protecting the coil 88 and electrically insulating the current flowing through the coil 88 from leakage. One end of a tie bar 102 is fixed to the fixing plate 101. Reference numeral 103 denotes a fixing member such as a screw for pressing the fixing plate attached to the diver 102 from both sides to fix the position of the fixing plate so as not to be displaced. These fixing members 103 fix the fixing plate with such a force that the position of the fixing plate is not displaced by the impact force applied to the device when the opening / closing device is opened or closed.

Next, the opening operation of the switchgear shown in FIG. 16 will be described. First, when an unsteady current, for example, a pulsed current is caused to flow through the coil 88, a current is induced in the repulsion portion 87 by the generated magnetic field, and the electromagnetic repulsion acts on the coil 88 and the repulsion portion 87. By receiving the electromagnetic repulsion force, the repulsion unit 87 moves rightward on the paper while pressing the contact pressure spring 93. Since the repulsion part 87 is fixed to the movable conductive rod 89, and the movable electrode 90 is provided at the tip of the movable conductive rod 89, the movable electrode 90 moves in conjunction with the movement of the repulsion part 87. When the movable electrode 90 moves and the distance between the fixed electrode 91 and the movable electrode 90 moves to a position where the opening and closing device can be regarded as being opened, the movable conductive rod 89 is held by the latch 92. When the movable conductive rod 89 is held by the latch 92, the opening operation is completed.

Next, the operation of closing the switching device will be described. The movable conductive rod 89 held by the latch 92 when the electrode is opened
Is released, the movable conductive rod 89 moves leftward in the drawing due to the push-back force of the contact pressure spring 93, whereby the movable electrode 90 also moves leftward in the drawing. When the movable electrode 90 comes into contact with the fixed electrode 91, the closing operation is completed.

[0005]

In order to make the switching device respond at high speed, it is necessary to perform the opening or closing operation at high speed as described above. When performing the opening operation at high speed,
It is only necessary to increase the electromagnetic repulsive force applied to the repulsion portion 87. However, when the electromagnetic repulsive force is increased, when the movable conductive rod 89 is held by the latch 92, the speed of the movable conductive rod 89 is large. At the moment when the movable conductive rod 89 is held at 92, an excessive impact force is applied to the entire device, so that it is necessary to increase the mechanical strength of the device. In particular, when an excessive impact force is applied to the shock absorbing member 95, the shock absorbing member 95
May be broken, and the degree of vacuum in the switch 86 may not be maintained.

In order to solve this problem, a method of increasing the rigidity of the contact pressure spring 93 to enhance the deceleration effect and holding the latch 92 when the speed of the movable conductive rod 89 becomes zero can be considered. Is used, when the movable electric rod 89 is held by the latch 92, the contraction of the contact pressure spring 93 is maximized. Therefore, when the movable conductive rod 89 is held at this position, the contact pressure spring 93 The push-back force becomes excessive, and it is necessary to increase the mechanical strength of the opening / closing device.

When the closing operation is performed at a high speed, a contact spring 93 having a large spring constant may be used. In this case, when the movable electrode 90 and the fixed electrode 91 come into contact with each other. In addition, the impact force applied to the fixed electrode 91 increases, and the switch 86 may be broken.

When an unsteady current flows through the coil 88, an electromagnetic repulsive force is generated in the repulsion portion 87. However, the larger the time change of the current is, the more the current flows through the coil 88. Although the operating time required for the movable conductive rod 89 to start moving from can be shortened, if the temporal change of the current is large, the electromagnetic repulsion also increases at the same time. There was a limit to shorten the operation start time.

When the distance between the coil 88 and the repelling portion 87 is appropriately increased, the electromagnetic repulsive force acting on the repelling portion 87 is rapidly reduced, and the movable electrode 9 is not moved until the electrode is completely opened.
0 could not be accelerated or decelerated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is applied to a device by performing both acceleration and deceleration of a movable electrode by using an electromagnetic repulsion force during operation of a switchgear. This is to reduce the impact force. When the opening operation is performed, the speed of the movable conductive rod 89 at the position where the movable conductive rod 89 is held by the latch 92 is 0 or An object is to reduce the impact force exerted on the buffer member 95 and the entire device by controlling the value to be close to zero. In addition, when the closing operation is performed, the speed of the movable conductive rod 89 is set to 0 at a position where the movable electrode 90 and the fixed electrode 91 come into contact with each other and move by receiving the electromagnetic repulsive force acting on the repulsion portion. , Or by controlling so as to be close to 0 to reduce the impact force applied to the fixed electrode 91 and the entire device. That is, in the opening or closing operation, by shortening the operation time and adjusting the speed of the movable electrode 90, the influence of the impact force on the latch 92, the buffer member 95, the fixed electrode 91, and the entire device is reduced. Reduction of the mechanical strength required for the portion to which the latch 92 is fixed by reducing the force held by the latch 92, and achieving the optimal operation required for the switchgear. Aim. In addition, high-speed operation can be realized even for switches with a long distance between the movable electrode and the fixed electrode when the electrode is opened, the size of the coil is reduced, and the number of power supplies that supply current to the coil is reduced. By doing so, the size of the switchgear is reduced in size.

[0011]

According to a first aspect of the present invention, there is provided a switchgear having a fixed electrode, a movable electrode in contact with the fixed electrode, and a movable electrode in a direction of increasing a distance between the fixed electrode and the movable electrode. Flowing a current through the first coil for providing a driving force for moving the first coil, the second coil for providing a braking force for braking the movable electrode driven by the first coil, and the first coil. A driving force acting to accelerate the speed of the movable electrode, or a repulsion portion receiving a braking force acting to reduce the speed of the movable electrode by passing a current through the second coil. is there.

The opening and closing device according to claim 2 is a drive for moving the movable electrode in a direction in which the distance between the fixed electrode, the movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first repulsion portion that receives a force, a second repulsion portion that receives a braking force for braking the movable electrode that moves when the first repulsion portion receives a driving force, and the first repulsion portion , And a coil for applying a braking force to the second repulsion portion.

The opening / closing device according to claim 3 is a drive for moving the movable electrode in a direction in which a distance between the fixed electrode, the movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first coil for applying a force, a driving force for adjusting the speed of the movable electrode driven by the first coil, or a second coil for applying a braking force, a braking force for braking the movable electrode And a repulsion portion that receives a driving force or a braking force applied by the first coil, the second coil, or the third coil.

The switchgear according to claim 4, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first coil for applying a driving force for moving the movable electrode in a direction in which the movable electrode contacts the second coil, and a second coil for applying a braking force for braking the movable electrode driven by the first coil A driving force acting to accelerate the speed of the movable electrode by flowing a current through the coil and the first coil, or acting to reduce the speed of the movable electrode by flowing a current through the second coil It has a repulsion part for receiving a braking force.

The switchgear according to claim 5, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first repulsion portion for receiving a driving force for moving the movable electrode in a direction in which the movable electrode is in contact with the movable electrode, for braking the movable electrode that is moved by the first repulsion portion receiving the driving force; And a coil for applying a driving force to the first repulsion section and applying a braking force to the second repulsion section.

[0016] The switchgear according to claim 6 includes a fixed electrode,
A movable electrode in contact with the fixed electrode;
The fixed electrode and the movable electrode
In order to cause the repulsion portion to act on the repulsion portion,
It is provided with three coils for accelerating or decelerating the emitting part .

The opening / closing device according to claim 7 accelerates the repulsion portion.
Alternatively, it further has one coil for deceleration .

[0018] The opening and closing device according to claim 8 has at least two repulsion portions.

The opening / closing device according to the ninth aspect is characterized in that the interval between adjacent repulsion portions and the interval between adjacent coils are different.

In the switchgear according to the tenth aspect , assuming that an interval between adjacent repulsive portions is s and an interval between adjacent coils is d, s = (2n-1) d / 2, where n is a natural number. Is satisfied.

[0021] In the switchgear according to the eleventh aspect , the inner diameter of the coil is smaller than the outer diameter of the repulsion portion.

[0022] In the switchgear according to the twelfth aspect , the inner diameter of the coil is larger than the outer diameter of the repulsion portion.

According to a thirteenth aspect of the present invention, the opening / closing device has the movable electrode attached so that the movable electrode and the repulsion unit move in conjunction with each other, and a movable conductive rod for attaching the repulsion unit.

According to a fourteenth aspect of the present invention, in the switchgear, a first current source for supplying a current having a large change in current value to the coil with respect to a time change, and a change in the current value with respect to a time change. A second current source for supplying a small current to the coil.

[0025]

The opening and closing device according to claim 1 is a drive for moving the movable electrode in a direction in which a distance between the fixed electrode, a movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first coil for applying a force, a second coil for applying a braking force for braking the movable electrode driven by the first coil, and a speed of the movable electrode by applying a current to the first coil. By providing a repulsion portion that receives a driving force that acts to accelerate the current, or a braking force that acts to reduce the speed of the movable electrode by passing a current through the second coil, at the end of the opening operation In the above, the impact force applied to the device is reduced.

The opening and closing device according to claim 2 is a drive for moving the movable electrode in a direction in which a distance between the fixed electrode, the movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first repulsion portion that receives a force, a second repulsion portion that receives a braking force for braking the movable electrode that moves when the first repulsion portion receives a driving force, and the first repulsion portion By applying a driving force to the, and by providing a coil that applies a braking force to the second repulsion portion,
The impact force applied to the device at the end of the opening operation is reduced.

The opening and closing device according to claim 3 is a drive for moving the fixed electrode, a movable electrode in contact with the fixed electrode, and moving the movable electrode in a direction of increasing a distance between the fixed electrode and the movable electrode. A first coil for applying a force, a driving force for adjusting the speed of the movable electrode driven by the first coil, or a second coil for applying a braking force, a braking force for braking the movable electrode By providing a third coil, and a first coil, a second coil, or a repulsion unit receiving a braking force acting on the second coil, at the end of the opening operation,
Reduce the impact force on the device.

The switchgear according to claim 4, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first coil for applying a driving force for moving the movable electrode in a direction in which the movable electrode contacts the second coil, and a second coil for applying a braking force for braking the movable electrode driven by the first coil A driving force acting to accelerate the speed of the movable electrode by flowing a current through the coil and the first coil, or acting to reduce the speed of the movable electrode by flowing a current through the second coil By providing the repulsion portion for receiving the braking force, the impact force exerted on the device at the end of the closing operation is reduced.

The switchgear according to claim 5, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first repulsion portion for receiving a driving force for moving the movable electrode in a direction in which the movable electrode is in contact with the movable electrode, for braking the movable electrode that is moved by the first repulsion portion receiving the driving force; By providing a second repulsion portion receiving the braking force of, and a coil for applying a driving force to the first repulsion portion, and applying a braking force to the second repulsion portion,
At the end of the closing operation, the impact force applied to the device is reduced.

[0030] The switchgear according to claim 6 includes a fixed electrode,
A movable electrode in contact with the fixed electrode;
The fixed electrode and the movable electrode
In order to cause the repulsion portion to act on the repulsion portion,
Equipped with three coils to accelerate or decelerate the emitting part
At the end of the loading operation.
Further reduce impact force.

The opening / closing device according to claim 7 accelerates the repulsion portion.
Alternatively, provide one more coil for deceleration.
With sufficient driving force or braking force applied to the repulsion part
Can be done.

The opening / closing device according to the eighth aspect has at least two repulsion portions, so that the opening or closing operation is performed more precisely.

In the switching device according to the ninth aspect , the interval between the adjacent repulsion portions and the interval between the adjacent coils are different.
The time variation of the force acting on the repulsion part can be reduced.

[0034] When the distance between the switchgear adjacent reactive portion of claim 10 s, and adjacent the spacing between the coil and d, s = (2n-1 ) d / 2 { where, n is a natural number} Is satisfied, it is possible to reduce the temporal variation of the force acting on the repulsion portion.

In the switchgear according to the eleventh aspect , the inner diameter of the coil is smaller than the outer diameter of the repulsion portion,
A large driving force or braking force can be obtained.

In the switchgear according to the twelfth aspect , the inner diameter of the coil is larger than the outer diameter of the repulsion part,
The distance between the movable electrode and the fixed electrode at the time of opening can be increased.

According to a thirteenth aspect of the present invention, in the opening / closing device, the movable electrode is attached so that the movable electrode and the repulsion part move in conjunction with each other, and the movable resilient part is provided with a movable conductive rod for attaching the repulsion part. By controlling the acting driving force or braking force, the impact force applied to the device at the end of the opening or closing operation is reduced.

According to a fourteenth aspect of the present invention, there is provided the switching device according to the first aspect, wherein the first current source supplies a current having a large change in current value to the coil with respect to a time change, and the current value changes with a time change. By providing the second current source for supplying a small current to the coil, it is possible to reduce the time required for the stopped repulsion part to start moving.

[0039]

[Embodiment 1] FIG. 1 shows a switchgear according to an embodiment of the present invention.
It is a figure which shows the state at the time of closing, and the state at the time of opening. In FIG. 1, reference numerals 88a and 88b denote coils, and a coil 8
The repulsion portion 87 is located between the coil 8b and the coil 88b. 9
Reference numeral 8 denotes a fixing plate for fixing the coil 88b.
b is fixed to the tie bar 102. The repulsion portion 87 includes the conductor plates 871 and 872, and the conductor plate 871 and the conductor plate 87.
2 is provided with a connecting portion 873 for connecting the first and second members. Further, at the time of closing, the repulsion portion 87 is at a position close to or in contact with the coil 88a, and at the time of opening, the repulsion portion 87 is at a position close to the coil 88b.

Next, the operation of the switching device will be described. The opening operation will be described. Before the opening operation is performed, the opening and closing device is in the closed state, so that the repulsion portion 87 is located near or in contact with the coil 88a. When performing the opening operation,
First, an unsteady current whose magnitude changes in response to a temporal change, for example, a pulse-like or step-like current is applied to the coil 88a. The repulsion unit 87 is controlled by the magnetic field generated by flowing an unsteady current through the coil 88a so as to suppress the fluctuation of the magnetic flux crossing the repulsion unit according to the electromagnetic induction law.
An eddy current is induced in the repulsion portion 87 and an electromagnetic repulsion force acts on the repulsion portion 87 in the right direction on the paper. The magnitude of the electromagnetic repulsion depends on the product of the eddy current and the radial component of the magnetic flux components crossing the repulsion. At this time, the movable electrode 90 moves rightward on the paper, and opens when the distance between the movable electrode 90 and the fixed electrode 91 becomes larger than the insulation distance. Movable electrode 90 and fixed electrode 9
Even after the distance between the movable electrode 90 and the movable electrode 90 becomes larger than the insulation distance, the movable electrode 90 moves rightward on the paper by inertia, and
When the distance between the coil 88b and the coil 88b becomes a predetermined value, an unsteady current is applied to the coil 88b to stop the movable electrode 90, and a leftward electromagnetic force is applied to the repulsion unit 87 as a braking force. Let it. The speed of the movable electrode 90 is reduced by the push-back force of the contact pressure spring 93 and the electromagnetic repulsive force. At this time, the opening operation is completed by holding the movable conductive rod 89 by the latch 92. The latch 92
The resilient portion 87 is designed to be located close to the coil 88b when the movable conductive rod 89 is held.

As described above, even when an excessive driving force (electromagnetic repulsion in the present embodiment) is applied to move the movable electrode 90 during the opening operation, a braking force (in this embodiment, a braking force) is applied to the movable electrode 90. The provision of the coil 88b for applying the electromagnetic repulsion makes it possible to adjust the position where the speed of the movable electrode 90 becomes zero (or the position where the contraction of the contact pressure spring 93 becomes maximum). Therefore, by holding the movable conductive rod 89 using the latch 92 at the position where the speed of the movable electrode 90 becomes 0, the influence of the impact force applied to the entire device, particularly the shock absorbing member 95 when the latch 92 is held is reduced. It is possible to do. Therefore, the mechanical strength required for the opening and closing device can be reduced as compared with the related art.

Further, it is possible to adjust the position where the contraction of the contact pressure spring 93 becomes maximum, that is, the position where the speed of the movable electrode 90 becomes zero. The return force can be adjusted, the movable conductive rod 89 is held by the latch 92 at a position where the push-back force is small and the opening is sufficiently ensured. The push-back force of the pressure spring 93 can be reduced, and the mechanical strength required for the member for fixing the latch 92 can be reduced.

Regarding the timing of applying a current to the coil, when a step-like current is applied to the coils 88a and 88b at the same time, the repulsion section 87 first receives a rightward electromagnetic repulsion from the coil 88a, and as a result, the coil 88b When approaching, it decelerates (brakes) by receiving the electromagnetic repulsive force from the coil 88b.

Separate power supplies are provided for the coils 88a and 88b, and a pulsed current is applied to the coil 88a only at the beginning of the opening, and at the end of the opening, a pulsed current is applied only to the coil 88b. May be applied. Alternatively, a single power supply may be used to apply pulsed currents to both coils at the beginning and end of opening, respectively.

Next, the operation of input will be described. Before the closing operation is performed, the opening and closing device is in the opened state, so that the repulsion portion 87 is located close to the coil 88b. When performing the closing operation, first, the latch 92 is opened, and an unsteady current flows through the coil 88b. When an eddy current is induced in the repulsion unit 87 by a magnetic field generated by flowing a current through the coil 88b, an electromagnetic repulsive force acts on the repulsion unit 87 in a leftward direction on the paper. The movable electrode 90 has an electromagnetic repulsion force and a contact pressure spring 9.
With the driving force generated by the push-back force of No. 3, it moves to the left on the paper. When the distance between the repulsion unit 87 and the coil 88a reaches a predetermined value, an unsteady current is caused to flow through the coil 88a to cause the repulsion unit 87 to act on the repulsion unit 87 with a rightward electromagnetic repulsion force as a braking force. As a result, the speed of the movable electrode 90 is reduced, and the movable electrode 90 and the fixed electrode 91 are brought into contact with each other to stop, and the closing operation ends.

As described above, during the closing operation, the movable electrode 9
By providing the coil 88b for providing an electromagnetic repulsion force as a driving force (in this embodiment, a push-back force of the contact pressure spring and an electromagnetic repulsion force), a driving force larger than that of the related art can be obtained. Also,
At the moment when the movable electrode 90 and the fixed electrode 91 come into contact with each other by the electromagnetic repulsive force acting on the repulsion part by the coil 88a in the latter half of the closing operation, the speed of the movable electrode 90 is adjusted to be 0 or sufficiently small, so that During the loading operation,
When the movable electrode 90 and the fixed electrode 91 come into contact with each other, it is possible to reduce the impact of an impact force on the entire opening / closing device, particularly on the fixed electrode 91.

Regarding the timing of applying a current to the coil, when a step-like current is applied to the coils 88a and 88b at the same time, the repulsion section 87 first receives a leftward electromagnetic repulsive force from the coil 88b. When approaching, it decelerates (brakes) by receiving the electromagnetic repulsive force from the coil 88a.

Separate power supplies are prepared for the coils 88a and 88b, and a pulse-like current is applied to the coil 88b only at the beginning of the application, and a pulse-like current is applied only to the coil 88a at the end of the application. May be. Alternatively, a single power supply may be used to apply pulsed currents to both coils at the beginning and end of turning on, respectively.

In addition, during the closing operation, the driving force for driving the movable electrode is the push-back force of the contact pressure spring 93 and the electromagnetic repulsion force of the coil 88b, so that a larger driving force than in the prior art can be obtained. Will be. Further, even if the spring constant of the contact pressure spring 93 is selected to be smaller than before, the coil 8
By adjusting the magnitude of the electromagnetic repulsive force generated by 8b, the same or a larger driving force can be obtained as before, and the spring constant of the contact pressure spring 93 is small. Since such a force can be reduced, the mechanical strength required for the member for fixing the latch 92 can be reduced.

Further, in the present embodiment, the example in which the repulsion portion 87 is formed by connecting the conductor plates 871 and 872 by the connection portion 873 has been described. It is possible to perform pole and closing operations. Further, in the present embodiment, the position of the repulsion portion 87 at the time of closing and opening is described. However, the position of the repulsion portion 87 acts on the repulsion portion 87 by flowing an unsteady current through the coil 88a or 88b. If the moving electromagnetic electrode 90 can move the movable electrode 90, the coil 88a
And the coil 88b.

By performing the above-described operation, it is possible to reduce the impact force applied to the entire apparatus at the time of opening or closing. In the power supply for supplying current to the coils 88a and 88b, a power supply for opening and a power supply for turning on may be provided separately. Furthermore, by separately preparing a power supply for supplying a current to each of the coils 88a and 88b, the magnitude of the electromagnetic repulsion, the timing of supplying a current to the coils, the repulsion portion 87, the movable conductive rod 8
9, and the position and speed of the movable electrode 90 can be more finely controlled. Therefore, the speed at the end of the opening or closing operation can be made an appropriate speed, and the mechanical strength required for the opening / closing device can be reduced as compared with the related art.

Embodiment 2 FIG. FIG. 2 is a diagram illustrating a state in which the switchgear is turned on and a state in which the electrode is opened in the switchgear according to the embodiment. In FIG. 2, 87a and 87b are repulsion portions. The switchgear of the present invention is characterized in that it has two repulsion portions and one coil 88. Also, at the time of closing, the coil 88 and the repulsion portion 87
The distance between the repulsion portions 87a and 87b is designed so that the coil 88 and the repulsion portion 87a are close to each other when b is close and the electrode is opened.

The operation of the switchgear of this embodiment will be described. The opening operation will be described. Before the opening operation, the opening and closing device is in the closed state, so that the repulsion portion 87 b is located close to the coil 88. In FIG.
When an unsteady current flows through the magnetic field 8, an eddy current is induced in the repulsion portion 87b by the generated magnetic field. As a result, the repulsion portion 87
Electromagnetic repulsion force acting on the right side of the drawing acts on b, and the movable electrode 90 moves rightward on the drawing. When the distance between the fixed electrode 91 and the movable electrode 90 becomes larger than the insulation distance due to this movement, the electrode is opened. Further, the movable electrode 90 moves due to inertia, and when the distance between the repulsion portion 87a and the coil 88 reaches a predetermined value, an unsteady current flows through the coil 88, so that the repulsion portion 87a is turned to the left as a braking force. The electromagnetic repulsive force acts to reduce the speed of the movable electrode 90,
After the repulsion portion 87a stops at a position close to the coil 88, the movable conductive rod 89 is held by the latch 92, and the operation of opening the electrode is completed. In the present embodiment, in the opening operation, an unsteady current is applied to the coil 88 at the beginning and end of the opening. However, the configuration is such that a current is applied to the coil 88 only at the beginning of the opening. When the repulsion portion 87a approaches the coil 88, the magnetic flux crossing the repulsion portion 88a changes.
Thus, a leftward electromagnetic force acts on the repulsion portion 87a, so that a current may be applied to the coil 88 only at the beginning of the opening operation.

Next, the operation of input will be described. Before the closing operation is performed, the opening and closing device is in an open state, so that the repulsion portion 87 a is located close to the coil 88. In FIG. 2, the latch 92 is opened, and an unsteady current flows through the coil 88. When a current flows through the coil 88, a magnetic field is generated, and an eddy current is induced in the repulsion portion 87a. As a result, an electromagnetic repulsive force acts on the repelling portion 87a in the left direction on the paper surface, and the movable electrode 90 moves leftward on the paper surface. When the distance between the repulsion portion 87b and the coil 88 becomes a predetermined value due to this movement, an unsteady current is caused to flow through the coil 88 to cause the repulsion portion 87b to act on the right side of the drawing with an electromagnetic repulsion force. When the speed of the movable electrode 90 is reduced and the movable electrode 90 is brought into contact with the fixed electrode 91, the speed of the movable electrode is 0, or the fixed electrode 91 is contacted and stopped at such a speed that does not give an excessive impact force. The operation of the injection is completed. In this embodiment, in the closing operation, an unsteady current is supplied to the coil 88 at the beginning and the end of the closing. Since the magnetic flux crossing the repelling portion 88b changes when the 87b approaches the coil 88, an electromagnetic repulsive force acts on the repelling portion 87b in the right direction on the drawing, so that a current flows through the coil 88 only at the beginning of the closing operation. Such a configuration may be adopted.

In the present embodiment, the opening and closing operations can be performed only by the coil 88, which contributes to downsizing of the apparatus.

In this embodiment, the position of the repulsion portion 87 at the time of opening and closing is described. However, the position of the repulsion portion 87 is such that the magnitude of the electromagnetic repulsion is such that the movable conductive rod 89 can be moved. It can be anywhere if it is in position.

Embodiment 3 FIG. The repulsion portion 87 has a configuration having a conductor plate. However, since the thickness of the conductor plate is small, the repulsion portion 87 may bend when an electromagnetic repulsion force acts. In the present embodiment, when an electromagnetic repulsive force acts on the repulsion portion, the deflection is suppressed.

In FIG. 3, reference numerals 50 denote repulsion portions 87a and 87.
It is a connecting member for connecting b. The opening and closing operations of the switchgear are the same as in the second embodiment, and will not be described here. As in the present embodiment, the repulsion portion 8 is formed by the connecting member 50.
7a and 87b, the repulsion portion 87
By increasing the rigidity of the a and 87b, the strength is increased, and the bending of the repulsion portions 87a and 87b is further suppressed.

In this embodiment, the repulsion portions 87a and 87b
Using a connecting member 50 for connecting the repulsive portions 87a,
And 87b are connected, but the same effects as described above can be obtained even if the repulsion portions 87a and 87b and the connecting member 50 are integrally formed.

Embodiment 4 FIG. FIG. 4 shows a state of the switchgear of the present embodiment at the time of closing and at the time of opening. This embodiment is characterized in that at least two repulsive portions and at least three coils for controlling the electromagnetic repulsive force acting on the repulsive portions are provided.
In FIG. 4, at the time of closing, the repulsion part 87a is a coil 88a.
, And the repulsion portion 87b is located close to the coil 88b. Further, at the time of opening, the repulsion portion 87a is located close to the coil 88b, and the repulsion portion 87b is located close to the coil 88b. Also, the coils 88a and 8a
8b, and the coils 88b and 88c
Are equal to each other and have such a distance as to enable the operation of the switchgear.

Next, the operation of the switchgear of this embodiment will be described. The opening operation will be described. Before the opening operation, the opening and closing device is in the closed state, so that the repulsion portion 87a is located close to the coil 88a and the repulsion portion 87b is located close to the coil 88b. When turned in Figure 4, the flow nonstationary current coil 88a, and 88b, eddy currents are induced in the repulsion section 87a, and 87b. As a result, the repulsion portion 87
Electromagnetic repulsion to the right of the drawing acts as a driving force on a and 87b, and the movable electrode 90 moves to the right of the drawing. When the distance between the fixed electrode 91 and the movable electrode 90 becomes larger than the insulation distance due to this movement, the electrode is opened. Movable electrode 90
Is moved rightward on the page by inertia, and the distance between the repulsion portion 87a and the coil 88b, and the distance between the repulsion portion 87b and the coil 8
8c when the distance between the coil 88
b and 88c, by applying an unsteady current to the repulsion portions 87a and 88b to apply a leftward electromagnetic repulsion force to the repulsion portions 87a and 88b, thereby reducing the speed of the movable electrode 90. Then, after the repulsion portion 87b stops at a position close to the coil 88c, the movable conductive rod 89 is held by the latch 92 (not shown), and the operation of opening the electrode is completed.

Next, the operation of input will be described. Before the closing operation is performed, the opening / closing device is in the open state, so that the repulsion portion 87a is connected to the coil 88b and the repulsion portion 87b is
c. 4, when the latch 92 (not shown) is opened and an unsteady current flows through the coils 88b and 88c at the time of opening, a magnetic field is generated.
Due to the generation of the magnetic field, the repulsion portions 87a and 87
An eddy current is induced in b. As a result, a leftward electromagnetic force acts on the repelling portions 87a and 87b, and the movable electrode 90 moves leftward on the sheet by the electromagnetic repulsive force and the pushing back force of the contact pressure spring (not shown). With this movement,
The repulsion portion 87a approaches the coil 88a, and the repulsion portion 87
When “b” approaches the coil 88b, the unsteady current flows through the coils 88a and 88b, so that the repulsion portion 87
By applying an electromagnetic repulsion force to the right of the paper on b,
When the speed of the movable conductive rod 89 is reduced and the movable electrode 90 and the fixed electrode 91 are brought into contact with each other, the speed of the movable electrode 90 is 0 or a speed at which the movable electrode 90 does not apply an excessive impact force to the fixed electrode 91. After touching and stopping with, the closing operation is terminated.

By the above-described operation, the movable electrode 90 can reduce the impact force applied to the entire opening / closing device by reducing or decreasing the speed at the end of the opening and closing operations.

By providing at least two repulsion portions as described above, it is possible to disperse the electromagnetic repulsion force acting on the repulsion portion, and to suppress the deflection of the repulsion portion caused when the electromagnetic repulsion force is applied. Thereby, the rigidity of the repulsion portion can be increased. This makes it possible to perform the opening and closing operations at a higher speed. Furthermore, by using separate power supplies for each of the coils 88a, 88b, and 88c, the electromagnetic repulsion, the repulsion unit,
It is possible to further finely control the position and speed of the conductive rod and the movable electrode and adjust the speed at the end of operation to an appropriate speed, thereby reducing the mechanical strength required for the opening and closing device. It becomes possible. Further, by separately providing a power supply used for opening each coil and a power supply used for closing each coil, it is possible to perform the opening and closing operations more precisely (not shown).

In this embodiment, an example in which there are two repulsive portions and three coils has been described. However, the present invention is not limited to this. In general, a structure having a plurality of repulsive portions and coils is provided. By arranging the position of the repulsion part at the time of insertion and at a position where the movable conductive rod can be moved by the electromagnetic repulsion, the above-described effect is obtained (not shown).

In this embodiment, the distance between the coils 88a and 88b and the distance between the coils 88b and 88c are designed to be equal to each other. The same effects as described above are obtained (not shown).

Embodiment 5 FIG. FIG. 5 shows the switchgear of this embodiment. The present embodiment is characterized in that the outer diameter of the repulsion portion 87 is smaller than the inner diameter of the coil 88. In FIG. 5, the repulsion portion 87 is located close to the coil 88a when being closed, and the coil 88b when being opened.
It is designed to be located close to.

Next, the operation of the switching device will be described. The opening operation will be described. Before the opening operation, the opening and closing device is in the closed state, so that the repulsion portion 87 is located close to the coil 88a. When performing the opening operation, first, the coil 88a
An unsteady current flows through A magnetic field is generated by passing a current through the coil 88a. When an eddy current is induced in the repulsion portion 87 due to the generation of a magnetic field, an electromagnetic repulsion force acts on the repulsion portion 87 in the right direction on the paper. Thereby, the movable electrode 9
0 moves rightward on the paper and opens when the distance between the movable electrode 90 and the fixed electrode 91 becomes larger than the insulation distance. Even after the distance between the movable electrode 90 and the fixed electrode 91 becomes larger than the insulation distance, the movable electrode 90 moves rightward on the paper due to inertia, and when the repulsion portion 87 and the coil 88b approach each other, the coil An unsteady current flows through the repulsion unit 87
To the left side of the paper. This allows
The speed of the movable electrode 90 is reduced, and then the repulsive portion 87 is stopped at a position close to the coil 88b, and the movable electrode 89 is held by the latch 92 (not shown), thereby completing the opening operation. In this manner, at the moment when the movable conductive rod 89 is held by the latch 92 (not shown), the speed of the repulsion portion 87, the movable conductive rod 89, and the movable electrode 90 becomes zero,
Alternatively, by designing the speed to be sufficiently small, it is possible to reduce the influence of the impact force on the entire apparatus.

Next, the input operation will be described. Before the closing operation is performed, the opening and closing device is in the opened state, so that the repulsion portion 87 is located close to the coil 88b. When the closing operation is performed, the latch 92 (not shown) is opened, and a current flows through the coil 88b. Accordingly, when a magnetic field is generated and an eddy current is induced in the repulsion portion 87, an electromagnetic repulsion force acts on the repulsion portion 87 in the left direction on the paper, and the movable electrode 90 moves leftward on the paper surface due to the electromagnetic repulsion force. With a repulsion part 87,
When a predetermined distance from the coil 88a is reached, an unsteady current flows through the coil 88b to cause the repulsion portion 87 to exert an electromagnetic repulsion force directed rightward on the paper. Thereby, the repulsion part 87, the movable conductive rod 8
9, and the speed of the movable electrode 90 is reduced, and then stopped by the contact between the movable electrode 90 and the fixed electrode 91,
The operation of the input ends. As described above, when the movable electrode 90 and the fixed electrode 91 come into contact with each other, the speed of the repulsion portion 87, the movable conductive rod 89, and the movable electrode 90 becomes zero or the speed is designed to be sufficiently small. In addition, it is possible to reduce the influence of the impact force on the entire device.

Further, since the rigidity of the repulsion portion 87 is increased by reducing the outer diameter of the repulsion portion 87, the opening and closing operations can be performed at a higher speed. Further, in the above-described embodiments, the range in which the repulsion portion 87 can move depends on the interval between the individually arranged coils.
By reducing the outer diameter of 7, the repulsion portion 87 can freely move in the space inside the coil.

Embodiment 6 FIG. FIG. 6 shows the closed state and the opened state in the switchgear of this embodiment. In this embodiment, the electromagnetic repulsion acting on the repulsion portion 87 is made as large as possible. In FIG. 6, coils 88a and 88c
Is smaller than the outer diameter of the repulsion portion 87. The inner diameter of the coil 88 b is larger than the outer diameter of the repulsion part 87. Further, at the time of closing, the repulsion portion 87 is located close to the coil 88a, and at the time of opening, the repulsion portion 87 is located close to the coil 88c. The opening operation of this switchgear is the same as that of the fifth embodiment, and therefore will not be described here.

By making the inner diameters of the coils 88a and 88c smaller than the outer diameter of the repulsion portion 87, the repulsion portion 8
7, the magnitude of the electromagnetic repulsion acting on the repulsion portion of the switchgear shown in the fifth embodiment is larger.
In addition, by providing the coil 88b between the coils 88a and 88c, it is possible to more precisely control the adjustment of the moving speed of the repulsion unit 87. Further, the coil 88
By individually providing a power supply for supplying a current to the a, 88b, and 88c, the position and speed of the movable electrode 90 can be more finely controlled. Speed can be adjusted moderately.
Therefore, it is possible to increase the driving force for driving the movable electrode 90 at the time of opening and closing operations, and it is possible to reduce the mechanical strength required for the opening and closing device as compared with the related art. In addition, by applying this embodiment to a switching device that is designed to increase the distance between the movable electrode 90 and the fixed electrode 91 during opening, the opening and closing operations can be performed at high speed. Becomes possible.

Embodiment 7 FIG. In the fifth embodiment, the example of the switching device in which the outer diameter of the repulsion portion is smaller than the inner diameter of the coil has been described. In general, when the repulsion part is located in the space inside the coil and a current flows through the coil to generate an electromagnetic repulsion, the radial component of the magnetic flux crossing the repulsion part is extremely small. There is a possibility that the driving force or the braking force cannot be sufficiently applied to the motor. Therefore, in the case of the switchgear as described above, when the repulsion portion is located in the space inside the coil, it may not be possible to apply an electric current to the coil and apply a driving force or a braking force to the repulsion portion. is there. This embodiment has been made in order to solve the above-described problem, and is provided with at least two repulsion portions, and by setting the interval between adjacent coils and the interval between adjacent repulsion portions to be different values, Driving force is applied to at least one of the
Or, an opening / closing device capable of applying a braking force will be described.

FIG. 7 is a diagram showing a state when the switchgear of the seventh embodiment is opened and a state when the switchgear is turned on. 7, the distance between adjacent coils 88a and 88b, the adjacent coils 88b and 88c, and the adjacent coils 88a and 8
8b, and the adjacent repulsion portions 87a and 87b
Is s. At this time, s = d / between d and s
Assume that there is a relationship of two. Further, at the time of the opening operation, the repulsion portion 87b is arranged at a position where the movable electrode 90 can be moved by receiving the driving force applied by the coil 88a, that is, the electromagnetic repulsion force. Further, at the time of the closing operation, the repulsion portion 87a is arranged at a position where the movable electrode 90 can be moved by receiving the driving force applied by the coil 88d, that is, the electromagnetic repulsion force.

Next, the opening operation of the switchgear of this embodiment will be described. FIG. 8 is a diagram for explaining the operation of opening the electrodes in the switchgear of the present embodiment. The time when the opening operation is started from the state at the time of closing is set as a reference, and the elapsed time from this time is defined as t.

At t = 0, since the switching device is in the closed state, the movable electrode 90 and the fixed electrode 91 are in contact with each other. At this time, a current is caused to flow through the coil 88a to apply an electromagnetic repulsive force acting as a rightward driving force to the repelling portion 87b, so that the movable electrode 90 moves rightward in the drawing (FIG. 8).
(A)).

When t = t ₁ , the repulsion portion 87 a
8a and the coil 88b, and
b is located in the space inside the coil 88b. At this time, a current is caused to flow through the coil 88a, and an electromagnetic repulsive force acting as a rightward driving force on the sheet acts on the repelling portion 87a, so that the movable electrode 90 moves rightward on the sheet (FIG. 8).
(B)).

Further, the repulsion portion 87b includes a coil 88b,
When the repulsion portion 87a is located between the coil 88c and the repulsion portion 87a is located in the space inside the coil 88b, an electric current is supplied to the coil 88b to cause the repulsion portion 87b to act on the repulsion portion 87b as an electromagnetic repulsion force serving as a rightward driving force in the drawing. As a result, the movable electrode 90 moves rightward on the paper (not shown).

When t = t ₂ , the repulsion portion 87b is
Suppose that it is located in the space inside 8c and the repulsion part 87a is located between the coils 88b and 88c. At this time, a current is caused to flow through the coil 88c to apply a leftward electromagnetic force to the repulsion portion 87a, thereby applying a leftward braking force to the movable electrode 90 (FIG. 8C).

Further, it is assumed that the repulsion portion 87a is located in the space inside the coil 88c, and the repulsion portion 87b is located between the coils 88c and 88d. At this time, the coil 88d
To apply a leftward electromagnetic force to the repulsion portion 87b to apply a leftward braking force to the movable electrode 90 (not shown). Furthermore, the repulsion part 87b is located in the space inside the coil 88d, and the repulsion part 87a
Is located between the coils 88c and 88d. At this time, a current is caused to flow through the coil 88d to cause a leftwardly facing electromagnetic repulsion force on the repulsion portion 87a to move the movable electrode 9a.
By applying a braking force to the left of FIG. 0, t = t ₃
In other words, the repulsion portion 87a is located between the coil 88b and the coil 88c, and the repulsion portion 87b is
When the movable electrode 90 comes to a position inside the space inside the movable electrode 90, the movable electrode 90 is stopped by a latch 92 (not shown).
, The opening operation is terminated (FIG. 8).
(D)). In the course of this opening operation, the repulsion unit 87 receives three driving forces to the right and three braking forces to the left.

Next, the closing operation of the switchgear of this embodiment will be described. FIG. 9 is a diagram for explaining the closing operation in the switchgear of the embodiment. The time when the closing operation is started from the state at the time of opening is set as a reference, and the elapsed time from this time is defined as t.

At t = 0, since the opening and closing device is in the open state, the movable electrode 90 and the fixed electrode 91 are located apart from each other.
At this time, the movable electrode 90 moves to the left in the drawing by releasing the latch 92 (not shown), applying a current to the coil 88d, and applying an electromagnetic repulsion to the repulsion portion 87a as a driving force to the left in the drawing. (Fig. 9
(A)).

When t = t ₁ , the repulsion portion 87a is
8c, and the repulsion portion 87b is located between the coil 88c and the coil 88d. At this time, a current is passed through the coil 88d, and an electromagnetic repulsion force acting as a leftward driving force is applied to the repulsion portion 87b, so that the movable electrode 90 moves leftward in FIG.
(B)).

Further, when the repulsion portion 87b is located in the space inside the coil 88c and the repulsion portion 87a is located between the coils 88b and 88c, a current flows through the coil 88c, and the repulsion portion 87a faces leftward in FIG. By applying an electromagnetic repulsive force acting as a driving force, a driving force is applied to the movable electrode 90 to the left in the drawing (not shown).

When t = t ₂ , the repulsion portion 87 a
Suppose that it is located in the space inside 8b and the repulsion part 87b is located between the coils 88b and 88c. At this time, a current is caused to flow through the coil 88b to cause an electromagnetic repulsion force acting as a rightward braking force on the paper to act on the repulsion portion 87b, thereby applying a rightward braking force to the movable electrode 90 (FIG. 9).
(C)).

Further, when the repulsion part 87b is located in the space inside the coil 88b and the repulsion part 87a is located between the coils 88a and 88b, a current flows through the coil 88a, and the repulsion part 87a is directed rightward on the drawing sheet. By applying an electromagnetic repulsive force acting as a braking force, a braking force is applied to the movable electrode 90 in a direction to the right of the drawing (not shown). When t = t ₃ , it is assumed that the repulsion part 87a is located in the space inside the coil 88a, and the repulsion part 87b is located between the coils 88a and 88b. At this time, a current flows through the coil 88a,
The movable electrode 90 is stopped by applying an electromagnetic repulsive force acting as a rightward braking force on the paper to the movable electrode 90, thereby stopping the movable electrode 90. At this time, the movable electrode 90 and the fixed electrode 91 are separated from each other. Then, the contact operation is completed (FIG. 9D). In the process of the closing operation, the repulsion unit 87 receives three driving forces leftward and three braking forces rightward.

Therefore, by setting the interval between the adjacent coils and the interval between the adjacent repulsive portions to different values, a driving force or a braking force is applied to at least one of the two repulsive portions. This makes it possible to solve the problem that the driving force or the braking force may not work even when a current flows through the coil. In addition, by acting on the repulsion portion, it is possible to reduce a temporal variation of the driving force or the braking force applied to the movable electrode 90.

[0088] In the present embodiment has been described, thereby satisfying the s = d / 2, is not limited to this, s =
If (2n-1) d / 2 {n is a natural number}, the same effect as described above can be obtained. In this embodiment,
Although the number of actions of the driving force and the braking force received by the repulsion unit 87 is assumed to be equal, the number of actions is not necessarily equal, and the impulse of the driving force received by the repulsion unit and the impulse of the braking force are substantially equal. It just needs to be equal.

Embodiment 8 FIG. In the switchgear of the present embodiment,
FIG. 10 shows a state at the time of opening and a state at the time of closing. The switchgear of this embodiment is characterized in that a repulsion portion is provided on the outer periphery of the coil. In FIG. 10, the repulsion portion 87 has an annular shape, and is fixed to the movable conductive rod 89 via the cylindrical support member 55.

Next, the operation of the switching device will be described. The opening operation will be described. Before the opening operation, the opening and closing device is in the closed state, so that the repulsion portion 87 is located close to the coil 88a. When performing the opening operation, first, the coil 88a
An unsteady current flows through An eddy current is induced in the repulsion portion 87 by a magnetic field generated by flowing a current through the coil 88a, and an electromagnetic repulsion force acts on the repulsion portion 87 in the right direction on the paper. As a result, the movable electrode 90 moves rightward in the drawing, and opens when the distance between the movable electrode 90 and the fixed electrode 91 becomes larger than the insulation distance. Movable electrode 90 and fixed electrode 91
The movable electrode 90 also moves rightward on the paper due to inertia even after the distance between
When the coil 88b approaches, an unsteady current flows through the coil 88b to cause the repulsion unit 87 to act on the repulsion unit 87 as an electromagnetic repulsion force as a leftward braking force. As a result, the speed of the movable electrode 90 is reduced, and the repulsive portion 87 is eventually moved to the coil 8.
When approaching 8b and stopping, the movable conductive rod 89 is held by the latch 92, and the opening operation ends. In this way, the moment the movable conductive rod 89 is held by the latch 92 (not shown), the speed of the movable electrode 90 becomes zero or is designed to be sufficiently small, so that the impact on the entire apparatus can be reduced. It is possible to reduce the influence of the force.

Next, the operation of input will be described. Before the closing operation is performed, the opening and closing device is in the opened state, so that the repulsion portion 87 is located close to the coil 88b. When performing the closing operation, first, the latch 92 is opened, and an unsteady current flows through the coil 88b. The magnetic field generated thereby induces an eddy current in the repulsion portion 87, and the repulsion portion 87 acts on the repulsion portion 87 as a leftward electromagnetic force as a driving force for moving the movable electrode 90. The movable electrode 90 is moved leftward on the paper by this and the pushing-back force of the contact pressure spring 93. When the repulsion portion 87 and the coil 88a approach each other, the coil 8
An unsteady current is caused to flow through 8b to cause the repulsion portion 87 to act as a braking force with an electromagnetic repulsion force directed rightward on the paper. As a result, the speed of the movable electrode 90 decreases, and the movable electrode 90 and the fixed electrode 91 come into contact with each other to stop, and the closing operation ends. As described above, the effect of the impact force on the entire device is reduced by designing the speed of the movable electrode 90 to be zero or sufficiently small when the movable electrode 90 and the fixed electrode 91 come into contact with each other. It is possible to do.

Reference Example 1. FIG. 11A shows a switching device according to this reference example . Ginseng
Switchgear Reference Example is made in order to control the frictional force between the movable conductive rod 89 and the guide (clutch action). In FIG. 11, reference numeral 60 denotes a guide for holding the movable conductive rod 89. In this embodiment , the guide 60 is a coil 65.
The movable conductive rod 89 is held by fitting the inner diameter of the coil 65 and the movable conductive rod 89.
An example of the coil 65 provided in the guide 60 is shown in FIG. The coil 65 holds the movable electric rod 89 when no current flows through it, and when a current flows through the coil 65,
The inner diameter of the coil 65 has the property of increasing.

The operation of the reference example will be described. In the opening or closing operation, an inner diameter of the coil 65 is increased by supplying a current to the coil 65 in conjunction therewith, thereby reducing the frictional force between the guide 60 and the movable conductive rod 89. That is, since the coil 65 acts as a clutch that is restrained during non-operation and released during operation, the magnitude of the electromagnetic repulsion required to apply the driving force or the braking force to the repulsion unit 87 can be reduced. As a result, it is possible to reduce the impact force applied to the entire device and the push-back force applied to the contact pressure spring 93 applied to the latch 92 when the electrode is opened.

Reference Example 2 In the first embodiment , the guide 60 having the coil 65 for holding the movable conductive rod 89 is provided, and an unsteady current is supplied to the coil 65 in conjunction with the opening and closing operations, thereby providing the movable conductive rod 89. It has been shown that the frictional force between 89 and the guide 60 can be reduced. In this reference example , a specific method of flowing a current to the coil 65 in conjunction with the opening and closing operations will be described.

FIG. 12 is a diagram showing this specific method. In FIG. 12, reference numeral 75 denotes a power supply for supplying an unsteady current to the coil 88 for performing opening or closing operations, and reference numeral 70 denotes a control switch for controlling the supply of power.

With the above-described configuration, when opening or closing operation is performed, the switching device is operated by closing the control switch 70 at an appropriate time, and the coil 88 and Since an unsteady current flows through both of the coils 65, the inner diameter of the coil 65 increases while the movable conductive rod 89 is moving, and the frictional force between the movable conductive rod 89 and the guide 60 is reduced. At the end of the opening or closing operation, the control switch 70 is turned off, and the power supply 75 is turned off.
Is stopped, no current flows through the coil 65, and the inner diameter of the coil 65 becomes large enough to hold the movable conductive rod 89, and the coil 65 holds the movable conductive rod 89.

Therefore, the provision of the guide 60 having the coil 65 allows the frictional force generated on the movable electric rod 89 to be adjusted during the opening or closing operation, so that the speed of the movable electrode 90 can be adjusted. Thus, it is possible to reduce the impact force exerted on the entire device. Also,
At the end of the operation, it is possible to obtain an opening / closing device capable of holding the movable electric rod 89. Further, although the coil 65 and the coil 88 are connected in series in the present embodiment,
They may be connected in parallel.

Reference Example 3 Figure 13 is a diagram showing an example of a guide in the switchgear of the present embodiment. In FIG. 13, 89 is a movable conductive rod, 6
Reference numeral 0 denotes a guide, and the guide 60 is pressed against both sides of the movable conductive rod 89 and two plates 63 holding the movable conductive rod 89.
a and a spring for pressing the plates 63b, 63a and 63b into contact with each other, and the plates 63a and 63b
It has a coil 65 provided thereon. Since both ends of the spring 64 are attached to the plates 63a and 63b, the plates 63a and 63b press the movable conductive rod 89 by the retraction force. The coil 65 is supplied with an unsteady current, for example, a pulse current, so that the movable conductive rod 89
Is configured such that a force is generated in a direction in which the press-contact force acting on the contact member is weakened. The plates 63a and 63b are made of an insulating material.

When the opening or closing operation is not performed, the movable conductive rod 89 is pressed and held by the spring 64 and the plates 63a and 63b. During the operation of opening or closing, if current is supplied to the coil 65 in different directions, a radially outward force acts on the coil 65 by electromagnetic force, so that the distance between the plates 63a and 63b is reduced. In order to reduce the frictional force generated between the movable conductive rod 89 and the guide 60, the opening or closing operation can be performed with less electromagnetic repulsive force. Become. In addition, during opening or closing operation, by cutting off the current flowing through the coil 65,
Since the electromagnetic force generated in the coil 65 disappears, the plate 63
a and 63b come into pressure contact with the movable conductive rod 89, whereby the frictional force generated between the guide 60 and the movable conductive rod 89 makes the speed of the movable conductive rod 89 an appropriate speed.
It is possible to reduce the impact force applied to the entire device,
It is possible to reduce the mechanical strength required for the switchgear.

The surface of the movable conductive rod 89 supported by the guide 60 is electrically insulated, a conductor is used for the plates 63a and 63b, and a current flows through the plates 63a and 63b. The same operation as described above can be performed without using the coil 65.

Reference Example 4 FIG. 14 is a diagram showing a state at the time of closing in the opening and closing device of the present reference example . In this embodiment , the coil 88 has a function of adjusting a frictional force with the movable conductive rod 89 and a function of applying an electromagnetic repulsive force to the repulsion portion.

In FIG. 14, reference numeral 60 denotes a guide made of an elastic material such as rubber, and the guide 60 supports the movable conductive rod 89 by elastic force. The coil 88 is located inside the guide. The coil 88 has a property of having a function of causing an electromagnetic repulsion to act on the repulsion portion 87 by flowing a current through the coil 88 and generating a force in a direction to increase the inner diameter.

The operation of the reference example will be described. By flowing an unsteady current through the coil 88, an electromagnetic repulsive force acts on the repulsion portion 87, and the magnetic field generated by the coil 88 and the current flowing through the coil 88 cause the coil 88 to rotate.
Since the force acts in the direction of increasing the inner diameter of the guide 60, the pressing force of the guide 60 pressing the movable conductive rod 89 is reduced. As a result, the frictional force between the guide 60 and the movable conductive rod is reduced, so that the switchgear can be operated with a smaller electromagnetic repulsion, thereby reducing the impact force applied to the entire switchgear at the end of the operation. And after opening the latch 92
, The pushing-back force of the contact pressure spring 93 can be reduced.

At the end of the opening / closing and closing operations, the coil 8
When the current flowing through the coil 8 is cut off, no current flows through the coil 88, and no force acts on the coil 88 in a direction to increase the inner diameter. Therefore, the guide 60 holds the movable conductive rod 89 by elastic force.

With such an arrangement, the space between the coil 88 for inducing a current in the repulsion portion 87 and the power supply portion thereof can be omitted. Further, by cutting off the current flowing through the coil 88 included in the guide 60 at an appropriate time, the frictional force between the guide 60 and the movable conductive rod 89 is increased,
Since the speed of the movable conductive rod 89 at the end of the operation can be adjusted to an appropriate speed, when the operation is completed, when the movable conductive rod 89 is held by a latch (not shown), or when the movable electrode (not shown) and the fixed electrode are fixed. (Not shown), it is possible to reduce the impact force applied to the entire switchgear.
This makes it possible to reduce the mechanical strength required for the switchgear. Further, when applied to the above Examples 2 to 6, the space saving, the movable conductive rod 89, and the movable electrode 90
Can be effectively operated, and the mechanical strength required for the switching device can be further reduced.

Embodiment 9 FIG. FIG. 15 is a diagram illustrating an example of a power supply that supplies current to a coil that induces an eddy current in the repulsion portion in the switching device of the present embodiment. In FIG. 15, reference numeral 88 denotes a coil that induces a current in the repulsion portion, 75a a power supply that supplies a current that changes sharply with time, and 75b supplies a current that changes slowly with time. Power supply.

The operation of the present invention will be described. FIG.
When a relatively steep current generated by the power supply 75a flows through the coil 88, a magnetic field is generated and an eddy current is induced in the repulsion portion. At this time, the intensity of the magnetic field generated by the coil is
Since the current flowing through the coil is proportional to the change per time, the repulsion portion receives a stronger electromagnetic repulsion force from the coil 88 than the conventional device. Next, after the movable electrode 90 starts to move, a current that rises relatively slowly through the coil 75b is caused to move the movable electrode 90 using the electromagnetic repulsive force acting on the movable electrode 90 as a driving force.

With such a configuration, the opening,
Alternatively, at the time of turning on, the current pattern flowing at the initial stage of the operation is strengthened, so that the time required for the stopped movable electrode 90 to start moving can be reduced. That is, when the repulsion unit 87 is stopped, the coil 8
8, an unsteady current flows, and an electromagnetic repulsive force acts on the action portion 87, so that the operation time required for the movable electrode 90 to start moving can be shortened.

[0109]

The switchgear according to claim 1 is a fixed electrode,
A movable electrode in contact with the fixed electrode, a first coil for providing a driving force for moving the movable electrode in a direction to increase a distance between the fixed electrode and the movable electrode, driven by the first coil A second coil providing a braking force for braking the movable electrode, and a driving force acting to accelerate the speed of the movable electrode by passing a current through the first coil, or a second coil By providing a repulsion portion for receiving a braking force acting to reduce the speed of the movable electrode by flowing a current through the device, the impact force exerted on the device at the end of the opening operation is reduced.

The opening and closing device according to claim 2 is a drive for moving the movable electrode in a direction in which the distance between the fixed electrode, the movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first repulsion portion that receives a force, a second repulsion portion that receives a braking force for braking the movable electrode that moves when the first repulsion portion receives a driving force, and the first repulsion portion By applying a driving force to the, and by providing a coil that applies a braking force to the second repulsion portion,
The impact force applied to the device at the end of the opening operation is reduced.

[0111] The opening and closing device according to claim 3 is a drive for moving the movable electrode in a direction in which a distance between the fixed electrode, the movable electrode in contact with the fixed electrode, and the fixed electrode is increased. A first coil for applying a force, a driving force for adjusting the speed of the movable electrode driven by the first coil, or a second coil for applying a braking force, a braking force for braking the movable electrode By providing a third coil, and a first coil, a second coil, or a repulsion unit receiving a braking force acting on the second coil, at the end of the opening operation,
Reduce the impact force on the device.

The switchgear according to claim 4, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first coil for applying a driving force for moving the movable electrode in a direction in which the movable electrode contacts the second coil, and a second coil for applying a braking force for braking the movable electrode driven by the first coil A driving force acting to accelerate the speed of the movable electrode by flowing a current through the coil and the first coil, or acting to reduce the speed of the movable electrode by flowing a current through the second coil By providing the repulsion portion for receiving the braking force, the impact force exerted on the device at the end of the closing operation is reduced.

The switchgear according to claim 5, wherein the fixed electrode, a movable electrode located apart from the fixed electrode, the fixed electrode,
A first repulsion portion for receiving a driving force for moving the movable electrode in a direction in which the movable electrode is in contact with the movable electrode, for braking the movable electrode that is moved by the first repulsion portion receiving the driving force; By providing a second repulsion portion receiving the braking force of, and a coil for applying a driving force to the first repulsion portion, and applying a braking force to the second repulsion portion,
At the end of the closing operation, the impact force applied to the device is reduced.

The switchgear according to claim 6 includes a fixed electrode,
A movable electrode in contact with the fixed electrode;
The fixed electrode and the movable electrode
In order to cause the repulsion portion to act on the repulsion portion,
Equipped with three coils to accelerate or decelerate the emitting part
At the end of the loading operation.
Further reduce impact force.

The opening / closing device according to claim 7 accelerates the repulsion portion.
Alternatively, provide one more coil for deceleration.
With sufficient driving force or braking force applied to the repulsion part
Can be done.

The opening / closing device according to the eighth aspect has at least two repulsion portions, so that the opening or closing operation is performed more precisely.

According to the ninth aspect of the present invention, the gap between the adjacent repulsion portions and the gap between the adjacent coils are different from each other.
The time variation of the force acting on the repulsion part can be reduced.

[0118] When the distance between the switchgear adjacent reactive portion of claim 10 s, and adjacent the spacing between the coil and d, s = (2n-1 ) d / 2 { where, n is a natural number} Is satisfied, it is possible to reduce the temporal variation of the force acting on the repulsion portion.

[0119] In the switchgear according to the eleventh aspect , since the inner diameter of the coil is smaller than the outer diameter of the repulsion portion,
A large driving force or braking force can be obtained.

In the switchgear according to the twelfth aspect , since the inner diameter of the coil is larger than the outer diameter of the repulsion portion,
The distance between the movable electrode and the fixed electrode at the time of opening can be increased.

According to a thirteenth aspect of the present invention, the opening and closing device has the movable electrode attached thereto so that the movable electrode and the repulsion unit move in conjunction with each other, and the movable conductive rod for attaching the repulsion unit. By controlling the acting driving force or braking force, the impact force applied to the device at the end of the opening or closing operation is reduced.

According to a fourteenth aspect of the present invention, there is provided the switchgear according to the first current source, which supplies a current having a large change in current value to the coil with respect to time change, and a change in current value with respect to time change. By providing the second current source for supplying a small current to the coil, it is possible to reduce the time required for the stopped repulsion part to start moving.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a switchgear according to a first embodiment.

FIG. 2 is a diagram illustrating a configuration of an opening / closing device according to a second embodiment.

FIG. 3 is a diagram illustrating a configuration of an opening / closing device according to a third embodiment.

FIG. 4 is a diagram illustrating a configuration of a switchgear according to a fourth embodiment.

FIG. 5 is a diagram illustrating a configuration of an opening / closing device according to a fifth embodiment.

FIG. 6 is a diagram illustrating a configuration of an opening / closing device according to a sixth embodiment.

FIG. 7 is a diagram illustrating a configuration of an opening / closing device according to a seventh embodiment.

FIG. 8 is a diagram illustrating an operation of opening a contact in the switchgear according to the seventh embodiment.

FIG. 9 is a diagram illustrating a closing operation in the switchgear according to the seventh embodiment.

FIG. 10 is a diagram illustrating a configuration of a switchgear according to an eighth embodiment.

FIG. 11 is a diagram illustrating a configuration of an opening / closing device according to Reference Example 1 ;

FIG. 12 is a diagram illustrating a configuration of an opening / closing device according to a reference example 2 ;

FIG. 13 is a view showing a configuration of a guide in the opening / closing device of Reference Example 3 .

FIG. 14 is a diagram illustrating a configuration of an opening / closing device according to Reference Example 4 ;

FIG. 15 is a diagram illustrating a configuration of a power supply in the switchgear according to the ninth embodiment.

FIG. 16 is a diagram showing a configuration of a conventional switchgear.

[Explanation of symbols]

50: connecting member 55: supporting member 60: guide 63a, 63b: plate 6
4: Spring 65: Guide coil 70: Control switch 75, 75a, 75b: Power supply 86: Switch 87, 87a, 87b: Repulsion portion 88, 88a, 88b, 88c, 88d: Coil 89: Movable conductive rod 90: Movable electrode 91:
Fixed electrode 92: Latch 93: Contact pressure spring 94:
Coil press 95: Buffer member 96, 97, 98, 99, 100, 101: Fixing plate 102: Diver 103: Fixing member

Continuation of the front page (72) Inventor Kazuhiko Nishinomiya 1-2-1, Wadazakicho, Hyogo-ku, Kobe City Inside Mitsubishi Electric Corporation Kobe Works (72) Inventor Shigeto Fujita 8-1-1 Tsukaguchi Honcho Amagasaki City Mitsubishi Inside the Central Research Laboratory of Electric Co., Ltd. (72) Katsuhiko Horinouchi, Inventor 8-1-1, Tsukaguchi Honcho, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory (72) Inventor, Yasushi Nakayama 8-1-1, Tsukaguchi Honcho, Amagasaki City Mitsubishi Inside the Central Research Laboratory of Electric Machinery Co., Ltd. (72) Hiroyuki Sasao, Inventor Hiroyuki Sasao 8-1-1, Tsukaguchi-Honmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory (56) References ) Surveyed field (Int.Cl. ⁷ , DB name) H01H 33/38 H01H 33/66 H01H 3/28

Claims (14)

(57) [Claims] 1. A fixed electrode, a movable electrode in contact with the fixed electrode, and a first coil for providing a driving force for moving the movable electrode in a direction to increase a distance between the fixed electrode and the movable electrode. A second coil for applying a braking force for braking the movable electrode driven by the first coil, and a current flowing through the first coil to increase the speed of the movable electrode. An opening and closing device comprising: a repulsion unit that receives a driving force or a braking force that acts to reduce the speed of the movable electrode by flowing a current through a second coil. 2. A fixed electrode, a movable electrode in contact with the fixed electrode, and a first repulsion receiving a driving force for moving the movable electrode in a direction of increasing a distance between the fixed electrode and the movable electrode. Part, a second repulsion unit that receives a braking force for braking the movable electrode that is moved by the first repulsion unit receiving the driving force, and a driving force is applied to the first repulsion unit, And a switching device including a coil for applying a braking force to the second repulsion portion. 3. A fixed electrode, a movable electrode in contact with the fixed electrode, and a first coil for providing a driving force for moving the movable electrode in a direction to increase a distance between the fixed electrode and the movable electrode. A second coil for applying a driving force or a braking force for adjusting the speed of the movable electrode driven by the first coil, a third coil for applying a braking force for braking the movable electrode, And a repulsion unit receiving a driving force or a braking force applied by the first coil, the second coil, or the third coil. 4. A fixed electrode, a movable electrode positioned apart from the fixed electrode, a first coil for applying a driving force for moving the movable electrode in a direction in which the fixed electrode contacts the movable electrode, A second coil for applying a braking force for braking the movable electrode driven by the first coil, and a drive functioning to accelerate the speed of the movable electrode by flowing a current through the first coil An opening / closing device, comprising: a repulsion portion that receives a force or a braking force that acts to reduce the speed of the movable electrode by flowing a current through a second coil. 5. A fixed electrode, a movable electrode located apart from the fixed electrode, a first repulsion portion for receiving a driving force for moving the movable electrode in a direction in which the fixed electrode contacts the movable electrode. A second repulsion unit receiving a braking force for braking the movable electrode that is moved by the first repulsion unit receiving the driving force, and applying a driving force to the first repulsion unit; and An opening and closing device including a coil for applying a braking force to the second repulsion portion. 6. A fixed electrode and a movable contact with the fixed electrode.
An electrode, a repulsion unit that moves in conjunction with the movable electrode,
In order to make the electrode and the movable electrode come and go,
The repulsion is accelerated or decelerated by applying magnetic repulsion.
An opening and closing device comprising three coils for causing the opening and closing. 7. A system for accelerating or decelerating a repulsion part.
7. The device according to claim 6, further comprising one coil.
The switchgear as described. 8. The switchgear according to claim 3 , wherein the switchgear has at least two repulsion portions. 9. The switchgear according to claim 8 , wherein an interval between adjacent repulsion portions is different from an interval between adjacent coils. 10. The distance between adjacent repulsion portions is s and the distance between adjacent coils is d, wherein s = (2n-1) d / 2 where n is a natural number. The switchgear according to claim 8, The inner diameter of 11. coils, switchgear according to claim 1, any one of 10, characterized in that less than the outer diameter of the reactive portion. 12. The switchgear according to claim 1, wherein an inner diameter of the coil is larger than an outer diameter of the repulsion portion. 13. The movable electrode according to claim 1, further comprising: a movable electrode attached to the movable electrode so that the movable electrode and the repulsion unit move in conjunction with each other, and a movable conductive rod to which the repulsion unit is attached. The switchgear according to the paragraph. 14. A first current source for supplying a current having a large change in current value to a coil with respect to a temporal change, and supplying a current having a small change in a current value with respect to a temporal change to the coil. The switchgear according to any one of claims 1 to 13, further comprising a second current source that performs the switching.