High-speed input device, power conversion device, and power distribution equipment

Abstract

The high-speed inserter (101) includes a fixed electrode (10), a movable electrode (20) movable in a first direction (DR1) toward the fixed electrode, a guide portion (30) for guiding the movement of the movable electrode in the first direction, a holding portion (41) capable of holding the movable electrode separated from the fixed electrode with respect to the guide portion, and a driving portion (50) capable of pressing the movable electrode held by the holding portion toward the fixed electrode. The holding portion can hold the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion, and slides with at least one of the movable electrode and the guide portion when the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction.

Description

Technical Field

[0001] The present disclosure relates to a high-speed switch, and a power conversion device and a power distribution facility including the high-speed switch.

Background Art

[0002] The short-circuit device described in U.S. Patent No. 8,164,868 (Patent Document 1) includes a contact, a contact portion and an opening / closing rod, a spring, an opening / closing pin, and a pyrotechnic mechanical element. The contact portion and the opening / closing rod are integrally movable with respect to the contact. The spring is disposed on the side opposite to the contact with respect to the opening / closing rod and the contact portion. The opening / closing pin is movable in a direction orthogonal to the moving direction of the opening / closing rod, and can be switched between a state of being coupled to the side surface of the opening / closing rod and a state of not being coupled to the opening / closing rod. During normal operation of the semiconductor module, the opening / closing pin is held in a state of being coupled to the side surface of the opening / closing rod. In this state, the spring is compressed in the moving direction of the opening / closing rod. When a failure of the power semiconductor module is estimated, the pyrotechnic mechanical element operates to realize a state where the opening / closing pin is not coupled to the opening / closing rod. As a result, the stored spring is released, and the opening / closing rod and the contact portion are inserted into the contact.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the short-circuit device described in Patent Document 1, since the moving direction of the opening / closing pin for holding the contact portion in a state separated from the contact is different from the moving direction of the contact portion and the opening / closing rod, the movement of the contact portion and the opening / closing rod is performed after the movement of the opening / closing pin. As a result, in the above short-circuit device, the operation of inserting the contact portion into the contact is executed as a two-stage operation, and it is difficult to speed up the operation.

[0005] The main object of the present disclosure is to provide a high-speed switch, a power conversion device, and a power distribution facility capable of performing a faster switching operation.

Means for Solving the Problems

[0006] The high-speed switch according to the present disclosure includes a fixed electrode, a movable electrode movable in a first direction toward the fixed electrode, a guide portion for guiding the movement of the movable electrode in the first direction, a holding portion capable of holding the movable electrode spaced apart from the fixed electrode with respect to the guide portion, and a driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode. The holding portion can hold the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion. When the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction, at least one of the movable electrode and the guide portion slides.

Effects of the Invention

[0007] According to the present disclosure, a high-speed switch, a power conversion device, and a power distribution facility capable of performing a faster switching operation can be provided.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The same components are denoted by the same reference numerals, and their descriptions will not be repeated.

[0010] The high-speed switch according to this embodiment is electrically connected in parallel to one module circuit in an electrical device including a plurality of module circuits. When the one module circuit fails, the high-speed switch short-circuits both ends of the one module circuit to invalidate it, preventing the influence of the failure from spreading to other module circuits. The high-speed switch according to the present disclosure is applicable to any electrical device. As an example, the high-speed switch according to the present disclosure is applicable to a power conversion device. The high-speed switch according to the present disclosure protects each of a plurality of module circuits (unit converters) connected in cascade in a power conversion device, and is connected in parallel to each module circuit. As another example, the high-speed switch according to the present disclosure is applicable to power distribution equipment. The high-speed switch according to the present disclosure protects a plurality of module circuits (switchgear) in power distribution equipment, and is connected between one pole of the circuit breaker of each switchgear and the ground conductor.

[0011] Embodiment 1. <Configuration of High-Speed Switch> As shown in FIGS. 1 and 2, the high-speed switch 101 of Embodiment 1 includes a fixed electrode 10, a movable electrode 20, a guide portion 30, a first holding portion 41, and a drive portion 50.

[0012] The fixed electrode 10 is one of the two main electrodes (first main electrode) of the high-speed switch 101 that is electrically connected in parallel to one module circuit. The guide portion 30 is the other main electrode (second main electrode) of the two main electrodes of the high-speed switch 101 that is electrically connected in parallel to one module circuit in the high-speed switch 101. The movable electrode 20 is electrically connected to the guide portion 30 and is movable relative to the fixed electrode 10 and the guide portion 30. The guide portion 30 guides the movement of the movable electrode 20.

[0013] The movable electrode 20 is movable from a first position spaced apart from the fixed electrode 10 to a second position in contact with the fixed electrode 10. In this specification, the state where the movable electrode 20 is in the first position is referred to as the first state, and the state where the movable electrode 20 is in the second position is referred to as the second state.

[0014] FIG. 1 shows the first state of the high-speed switch 101. The first state is realized when the module circuits electrically connected in parallel to the high-speed switch 101 are operating normally. In the first state, the shortest distance L1 in the first direction DR1 between the fixed electrode 10 and the movable electrode 20 held by the first holding portion 41 is equal to or greater than the insulation distance between the fixed electrode 10 and the movable electrode 20. When the high-speed switch 101 is switched from the first state to the second state, the shortest distance between the fixed electrode 10 and the movable electrode 20 gradually becomes shorter than the shortest distance L1 and finally becomes zero. The shortest distance L1 is the shortest distance among the shortest distances between the fixed electrode 10 and the movable electrode 20 realized during the normal operation of the high-speed switch 101. In the first state, the module circuits electrically connected in parallel to the high-speed switch 101 are operating normally. In the first state, the voltage applied to the module circuits electrically connected in parallel to the high-speed switch 101 is applied between the fixed electrode 10 and the movable electrode 20. In the first state, since the fixed electrode 10 and the movable electrode 20 are electrically insulated from each other, a normal current flows through the module circuits.

[0015] FIG. 2 shows the second state of the high-speed switch 101. The second state is realized when the module circuits electrically connected in parallel to the high-speed switch 101 malfunction. In the second state, in the high-speed switch 101, the movable electrode 20 is electrically connected to the fixed electrode 10. The module circuits electrically connected in parallel to the high-speed switch 101 are bypassed and deactivated.

[0016] In this specification, the moving direction of the movable electrode 20 is described as the first direction DR1. The first direction DR1 may be along the vertical direction. In this case, the movable electrode 20 may be disposed above the fixed electrode 10 or may be disposed below the fixed electrode 10. The first direction DR1 may be along the horizontal direction. A central axis that passes through the center of the movable electrode 20 as viewed from the first direction DR1 and extends along the first direction DR1 is described as the central axis CA. The radial direction with respect to the central axis CA is described as the second direction DR2. The guide portion 30 has a guide surface 30A that extends along the first direction DR1. The guide surface 30A is, for example, an inner diameter surface that is continuous in the circumferential direction with respect to the central axis CA.

[0017] The first holding portion 41 can hold the movable electrode 20 separated from the fixed electrode 10 with respect to the guide portion 30. The driving portion 50 can press and move the movable electrode 20 held by the first holding portion 41 toward the fixed electrode 10.

[0018] In the high-speed inserter 101, the first holding portion 41 is provided so as to slide on the guide surface 30A of the guide portion 30 when the movable electrode 20 is pressed by the driving portion 50 and moves in the first direction DR1.

[0019] The first holding portion 41 has, for example, conductivity and electrically connects between the movable electrode 20 and the guide portion 30. Note that the first holding portion 41 may have electrical insulation. In this case, the high-speed inserter 101 may further include a connection member that electrically connects between the movable electrode 20 and the guide portion 30. The connection member may be provided so as to expand and contract when the movable electrode 20 is pressed by the driving portion 50 and moves in the first direction DR1, or may be provided so as to slide with at least one of the movable electrode 20 and the guide portion 30.

[0020] The high-speed injector 101 may be provided with a container 1. The container 1 has, for example, a first lid portion 2, a first pipe portion 3, a second pipe portion 4, and a second lid portion 5. Each of the first lid portion 2 and the second pipe portion 4 has conductivity. Each of the first pipe portion 3 and the second lid portion 5 has electrical insulation. The first pipe portion 3 and the second pipe portion 4 extend along a first direction DR1 and are arranged side by side in the first direction DR1. One open end of the first pipe portion 3 in the first direction DR1 is blocked by the first lid portion 2. The other open end of the first pipe portion 3 in the first direction DR1 is connected to one open end of the second pipe portion 4 in the first direction DR1. The other open end of the second pipe portion 4 in the first direction DR1 is blocked by the second lid portion 5. Inside the container 1, a space surrounded by the first lid portion 2, the first pipe portion 3, the second pipe portion 4, and the second lid portion 5 is formed.

[0021] The fixed electrode 10 is provided, for example, as a member identical to the first lid portion 2. A bottom portion 11, which will be described later, of the fixed electrode 10 is provided as the first lid portion 2. The guide portion 30 is provided, for example, as a member identical to the second pipe portion 4. At least a part of the movable electrode 20, the first holding portion 41, and the driving portion 50 is accommodated in the internal space of the container 1. The movable electrode 20 and the first holding portion 41 are movable relative to the container 1. The movable electrode 20 is movable inside the first pipe portion 3 and the second pipe portion 4. The first holding portion 41 is movable inside the second pipe portion 4. The driving portion 50 is fixed to the container 1. The driving portion 50 is fixed to the second lid portion 5, for example.

[0022] The internal space of the container 1 is filled with an insulating gas such as air or sulfur hexafluoride, for example. The internal space of the container 1 may be a vacuum.

[0023] Note that the first lid portion 2 may be provided as a member separate from the fixed electrode 10, for example. Only a part of the first lid portion 2 may be electrically connected to the fixed electrode 10 and may form the first main electrode together with the fixed electrode 10. The remaining portion of the first lid portion 2 may have electrical insulation. The second tube portion 4 may be provided as a member separate from the guide portion 30, for example. Only a part of the second tube portion 4 may be electrically connected to the guide portion 30 and may form the second main electrode together with the guide portion 30. The remaining portion of the second tube portion 4 may have electrical insulation.

[0024] The high-speed injector 101 may not include the container 1. Hereinafter, details of a specific example of the high-speed injector 101 will be described.

[0025] <Specific Example of High-Speed Injector> As shown in FIGS. 1 and 2, the fixed electrode 10 has a bottom portion 11 and a first protruding portion 12. The bottom portion 11 is exposed to the outside in the high-speed injector 101. The bottom portion 11 is provided as the first lid portion 2. The bottom portion 11 has a central portion and an outer edge portion surrounding the central portion when viewed from the first direction DR1. The outer edge portion of the bottom portion 11 is connected to one open end of the first tube portion 3 in the first direction DR1. The first protruding portion 12 protrudes from the central portion of the bottom portion 11 toward the movable electrode 20 side. The first protruding portion 12 has a top surface 10A facing the movable electrode 20 side in the first direction DR1. The top surface 10A is, for example, a plane orthogonal to the first direction DR1. Note that the top surface 10A may be a curved surface. The top surface 10A may be a convex surface. The top surface 10A may be a concave surface.

[0026] In the fixed electrode 10, the first protruding portion 12 is provided as a member the same as the bottom portion 11, for example. Note that the first protruding portion 12 may be provided as a member separate from the bottom portion 11.

[0027] The movable electrode 20 is movable in a first direction DR1 toward the fixed electrode 10. The movable electrode 20 has a main body portion 21 and a second protruding portion 22. The main body portion 21 is disposed on the side opposite to the fixed electrode 10 with respect to the second protruding portion 22 in the first direction DR1. The main body portion 21 has a central portion and an outer edge portion surrounding the central portion when viewed from the first direction DR1. The outer edge portion of the main body portion 21 is connected to one open end of the first pipe portion 3 in the first direction DR1. The second protruding portion 22 protrudes from the central portion of the main body portion 21 toward the fixed electrode 10 side. The outer diameter of the second protruding portion 22 in a second direction DR2 is smaller than the outer diameter of the main body portion 21 in the second direction DR2.

[0028] The second protruding portion 22 has a top surface 20A facing the fixed electrode 10 side in the first direction DR1. In the first state, the top surface 20A faces the top surface 10A of the fixed electrode 10. In the second state, the top surface 20A contacts the top surface 10A. The top surface 20A is, for example, a plane orthogonal to the first direction DR1. Note that the top surface 20A may be a curved surface. The top surface 20A may be a convex surface. In this case, the top surface 10A is preferably a concave surface.

[0029] The outer edge portion of the main body portion 21 has a side surface 20B facing outward in the second direction DR2. The side surface 20B faces the guide surface 30A of the guide portion 30 in the second direction DR2 at each of the first position and the second position. From a different perspective, the guide surface 30A of the guide portion 30 guides the movable electrode 20 and the first holding portion 41 when the movable electrode 20 moves from the first position to the second position.

[0030] A first groove portion 23 is provided on the side surface 20B of the outer edge portion of the movable electrode 20. The first groove portion 23 is recessed inward from the side surface 20B in the second direction DR2 and extends along the circumferential direction with respect to the central axis CA. The first groove portion 23 is, for example, an annular groove continuous in the circumferential direction with respect to the central axis CA. The first groove portion 23 is provided to accommodate a part of the first holding portion 41.

[0031] The first groove portion 23 has a pair of inner wall surfaces facing each other in the first direction DR1 and a bottom surface connecting the inner peripheral ends of the pair of inner wall surfaces. The bottom surface of the first groove portion 23 faces the guide surface 30A of the guide portion 30 in the second direction DR2.

[0032] The guide portion 30 has, for example, a straight pipe portion 31 and a flange portion 32. The straight pipe portion 31 extends along the first direction DR1. The inner peripheral surface of the straight pipe portion 31 forms the guide surface 30A. The length of the guide surface 30A in the first direction DR1 is equal to or greater than the moving distance between the first position and the second position of the movable electrode 20. The flange portion 32 extends outward in the second direction DR2 from one end of the straight pipe portion 31 located on the fixed electrode 10 side in the first direction DR1. The outer edge of the flange portion 32 in the second direction DR2 is connected to the open end of the first pipe portion 3 located on the side opposite to the fixed electrode 10 in the first direction DR1. The other end of the straight pipe portion 31 located on the fixed electrode 10 side in the first direction DR1 is connected to the outer edge of the second lid portion 5 in the second direction DR2. The flange portion 32 may be configured as the same member as the straight pipe portion 31. Note that the flange portion 32 may be a member different from the straight pipe portion 31.

[0033] The inner diameter of the straight pipe portion 31 is smaller than the inner diameter of the first pipe portion 3. The distance in the second direction DR2 between the side surface 20B of the movable electrode 20 and the guide surface 30A of the guide portion 30 is shorter than the distance in the second direction DR2 between the side surface of the fixed electrode 10 and the inner peripheral surface of the first pipe portion 3.

[0034] Preferably, in the first state, the shortest distance L1 between the fixed electrode 10 and the movable electrode 20 is longer than the shortest distance L2 between the fixed electrode 10 and the guide portion 30.

[0035] The first holding portion 41 is an elastic body that can be elastically deformed in the second direction DR2. The first holding portion 41 is, for example, an annular elastic body. The first holding portion 41 is in contact with each of the bottom surface of the first groove portion 23 and the guide surface 30A. The first holding portion 41 is sandwiched between the bottom surface of the first groove portion 23 and the guide surface 30A and is compressed in the second direction DR2. The first holding portion 41 applies a reaction force (elastic force) to each of the bottom surface of the first groove portion 23 and the guide surface 30A.

[0036] The first holding part 41 is in contact with at least one of the pair of inner wall surfaces of the first groove part 23. The first holding part 41 is in contact with each of the pair of inner wall surfaces of the first groove part 23, for example.

[0037] FIG. 3 is a plan view showing an example of the first holding part 41. As shown in FIG. 3, the first holding part 41 is, for example, a spring coil. The first holding part 41 is bent in an annular shape so as to surround the bottom surface of the first groove part 23 of the movable electrode 20 when viewed from the first direction DR1. One end in the circumferential direction of the first holding part 41 is connected to the other end in the circumferential direction of the first holding part 41, for example.

[0038] Referring to FIGS. 1 to 3, the first holding part 41 is compressed in the second direction DR2. When the first holding part 41 is sandwiched between the bottom surface of the first groove part 23 and the guide surface 30A, the width W1 (see FIG. 1) of a part of the first holding part 41 in the circumferential direction is equal to the distance in the second direction DR2 between the bottom surface of the first groove part 23 and the guide surface 30A. The width W1 is smaller than the width W0 (see FIG. 3) of a part of the first holding part 41 in the circumferential direction when the first holding part 41 is in a natural state where it is not sandwiched between the bottom surface of the first groove part 23 and the guide surface 30A.

[0039] The drive part 50 is, for example, a cylinder. The drive part 50 has, for example, a cylinder tube 51 and a rod 52. The cylinder tube 51 is fixed to the second lid part 5. The rod 52 is movable relative to the cylinder tube 51 in the first direction DR1. The rod 52 can press the movable electrode 20 toward the fixed electrode 10. In the first state, the rod 52 is separated from the movable electrode 20, for example. In the first state, the rod 52 may be in contact with the movable electrode 20. In the second state, the rod 52 presses the movable electrode 20 toward the fixed electrode 10, for example. In the second state, the movable electrode 20 in contact with the fixed electrode 10 is held by the drive part 50 and a spring 60 described later, for example.

[0040] In addition, in the second state, the rod 52 may be separated from the movable electrode 20. The movable electrode 20 in contact with the fixed electrode 10 may be held only by a spring 60 described later. The drive unit 50 may be an electric actuator.

[0041] The high-speed inserter 101 may further include a spring 60. The spring 60 biases at least the movable electrode 20 separated from the fixed electrode 10 toward the fixed electrode 10. The spring 60 biases the movable electrode 20 toward the fixed electrode 10 at least in the first state. Preferably, the spring 60 can bias the movable electrode 20 in contact with the fixed electrode 10 toward the fixed electrode 10. Preferably, the spring 60 biases the movable electrode 20 toward the fixed electrode 10 in the first state and the second state.

[0042] The spring 60 is disposed on the side opposite to the fixed electrode 10 with respect to the movable electrode 20 in the first direction DR1. One end of the spring 60 in the first direction DR1 is connected to the main body portion 21 of the movable electrode 20. Preferably, one end of the spring 60 in the first direction DR1 is connected to the main body portion 21 of the movable electrode 20 via an insulating member 24. The other end of the spring 60 in the first direction DR1 is connected to, for example, the second lid portion 5.

[0043] The spring 60 is stretchable and contractible in the first direction DR1. The natural length of the spring 60 in the first direction DR1 is shorter than the distance in the first direction DR1 between the movable electrode 20 and the second lid portion 5 in the first state. Preferably, the natural length of the spring 60 in the first direction DR1 is shorter than the distance in the first direction DR1 between the movable electrode 20 and the second lid portion 5 in the second state.

[0044] The inner diameter of the spring 60 in the second direction DR2 is larger than, for example, the maximum width of the drive unit 50 in the second direction DR2. The spring 60 is disposed so as to surround the drive unit 50, for example, in the second direction DR2. The outer diameter of the spring 60 in the second direction DR2 is smaller than the outer diameter of the movable electrode 20 in the second direction DR2.

[0045] In the high-speed inserter 101, it is held in the first state shown in FIG. 1 until the insertion operation is started due to, for example, detection of an abnormality in the module circuit. In the first state, the first holding portion 41 is compressed in the second direction DR2 by the difference between the width W0 and the width W1. The frictional force generated between the first holding portion 41 and the guide portion 30 in the first state is larger than the biasing force applied to the first holding portion 41 by the pre-tensioned spring 60. In the first state, the first holding portion 41 resists the biasing force of the spring 60 and prevents the movable electrode 20 from moving toward the fixed electrode 10.

[0046] In the high-speed inserter 101, when the insertion operation is started, it is switched from the first state to the second state shown in FIG. 2. At the time of switching, a force larger than the frictional force generated between the first holding portion 41 and the guide portion 30 in the first state is applied to the first holding portion 41 via the movable electrode 20 by the drive portion 50 and the spring 60. When the first holding portion 41 is pressed by the drive portion 50 as described above, it allows the movable electrode 20 to move toward the fixed electrode 10. As a result, the movable electrode 20 is guided by the guide portion 30 together with the first holding portion 41 and moves in the first direction DR1 to reach the second position.

[0047] In the high-speed inserter 101, the first holding portion 41 is provided so as to slide on the guide portion 30 when the movable electrode 20 pressed toward the fixed electrode 10 by the drive portion 50 moves in the first direction DR1.

[0048] When such a first holding portion 41 is pressed in the first direction DR1 via the movable electrode 20 by the drive portion 50, it can no longer prevent the movement of the movable electrode 20, moves toward the fixed electrode 10 together with the movable electrode 20, and slides on the guide portion 30. The direction of the pressing force applied to the movable electrode 20 and the first holding portion 41 to insert the movable electrode 20 into the fixed electrode 10 is the same as the moving direction of the movable electrode 20. In such a high-speed inserter 101, since the insertion operation of inserting the movable electrode 20 into the fixed electrode 10 can be executed as a one-step operation, the insertion operation can be speeded up compared with the conventional high-speed inserter described above.

[0049] The high-speed switch 101 further includes a spring 60 that biases the movable electrode 20 toward the fixed electrode 10. The first holding portion 41 allows the movable electrode 20, which is biased by the spring 60, to move toward the fixed electrode 10 when the movable electrode 20 is pressed by the driving portion 50.

[0050] In such a high-speed switch 101, since the pressing force of the driving portion 50 and the biasing force of the spring 60 are applied to the movable electrode 20 and the first holding portion 41, the switching speed (the speed of switching from the first state to the second state) can be increased as compared with the case where only the pressing force of the driving portion 50 is applied to the movable electrode 20 and the first holding portion 41.

[0051] In the high-speed switch 101, the spring 60 can bias the movable electrode 20 in contact with the fixed electrode 10 toward the fixed electrode 10. Thereby, the contact pressure generated between the movable electrode 20 and the fixed electrode 10 becomes larger as compared with the case where the spring 60 does not bias the movable electrode 20 in contact with the fixed electrode 10 toward the fixed electrode 10. In such a high-speed switch 101, the state in which the movable electrode 20 is energized to the fixed electrode 10 can be more reliably maintained.

[0052] The high-speed switch 101 includes a container 1 in which an insulating space is formed. The fixed electrode 10 and the guide portion 30 constitute a part of the container 1. The movable electrode 20, the first holding portion 41, and at least a part of the driving portion 50 are disposed in the container 1. In such a high-speed switch 101, it is possible to prevent the movable electrode 20 and the fixed electrode 10 from being electrically connected through the conductive gas existing between the movable electrode 20 in the first position and the fixed electrode 10.

[0053] In the high-speed inserter 101, the first holding portion 41 is positioned with respect to the movable electrode 20 and slides with respect to the guide portion 30 as the movable electrode 20 moves. Such a first holding portion 41 and guide portion 30 can appropriately guide the movable electrode 20 that moves from the first position to the second position. Even when the movable electrode 20 is in the second position, a frictional force can be generated between the first holding portion 41 and the guide portion 30. This frictional force, together with the contact pressure by the spring 60, suppresses the movement of the movable electrode 20 in the direction away from the fixed electrode 10.

[0054] In the high-speed inserter 101, the first holding portion 41 has conductivity. Such a first holding portion 41 can also serve as a connecting member that electrically connects the movable electrode 20 and the guide portion 30 as the second main electrode. Therefore, in the high-speed inserter 101, there is no need to separately provide a connecting member for electrically connecting the movable electrode 20 and the guide portion 30 as the second main electrode, and the number of parts can be reduced compared to a high-speed inserter in which the connecting member is provided separately from the first holding portion 41.

[0055] A first groove portion 23 is provided on the side surface 20B of the movable electrode 20. The first holding portion 41 is in contact with each of the guide surface 30A and the bottom surface of the first groove portion 23. The first groove portion 23 can position the first holding portion 41 with respect to the movable electrode 20.

[0056] In the high-speed inserter 101, the first holding portion 41 is a coil spring. The first holding portion 41 is bent in an annular shape so as to surround the movable electrode 20 when viewed from the first direction DR1, and is compressed in the second direction DR2. The holding force of such a first holding portion 41, that is, the reaction force applied to each of the bottom surface of the first groove portion 23 and the guide surface 30A by the first holding portion 41, is relatively stable and its adjustment is easy. Therefore, it is also easy to adjust the balance between the holding force of the first holding portion 41 and the biasing force of the spring 60. Therefore, in the high-speed inserter 101, the insertion operation is more stable than that of a conventional high-speed inserter. For example, compared with a high-speed inserter that provides a cut in the holding portion passed between the movable electrode and the container and presses the holding portion to cut the holding portion at the cut to insert the movable electrode into the fixed electrode, the insertion operation of the high-speed inserter 101 is more stable.

[0057] Embodiment 2. As shown in FIGS. 4 and 5, the high-speed inserter 102 according to Embodiment 2 has the same configuration and effects as those of the above-described Embodiment 1 unless otherwise specified. Therefore, the same components as those in the above-described Embodiment 1 are denoted by the same reference numerals and the description thereof will not be repeated.

[0058] In the high-speed inserter 102, the guide surface 30A of the guide portion 30 has a first guide surface 33A, a second guide surface 34A, and a third guide surface 35A. The first guide surface 33A faces the side surface 20B of the movable electrode 20 at the first position in the second direction DR2. The second guide surface 34A faces the side surface 20B of the movable electrode 20 at the second position in the second direction DR2. The second guide surface 34A is arranged closer to the fixed electrode 10 side than the first guide surface 33A in the first direction DR1.

[0059] In the high-speed inserter 102, the second guide surface 34A protrudes closer to the movable electrode 20 side than the first guide surface 33A in the second direction DR2. The distance L4 in the second direction DR2 between the second guide surface 34A and the side surface 20B of the movable electrode 20 is shorter than the distance L3 in the second direction DR2 between the first guide surface 33A and the side surface 20B of the movable electrode 20. The distance L3 and the distance L4 are smaller than the width W0 of the first holding portion 41.

[0060] The third guide surface 35A connects between the first guide surface 33A and the second guide surface 34A. The third guide surface 35A is inclined with respect to the first direction DR1. Preferably, the third guide surface 35A is inclined with respect to each of the first guide surface 33A and the second guide surface 34A such that it approaches the movable electrode 20 in the second direction DR2 as it goes toward the second guide surface 34A in the first direction DR1.

[0061] The guide portion 30 has a convex portion 36 that protrudes inward in the second direction DR2 from the first guide surface 33A. The convex portion 36 extends continuously in the circumferential direction with respect to the central axis CA. The second guide surface 34A is the inner diameter surface of the convex portion 36. The third guide surface 35A is the side surface of the convex portion 36.

[0062] In the high-speed inserter 102, it is held in the first state shown in FIG. 4 until the insertion operation is started due to, for example, detection of an abnormality in the module circuit. In the first state, the first holding portion 41 is compressed in the second direction DR2 by the difference between the width W0 and the width W1. The frictional force generated between the first holding portion 41 and the guide portion 30 in the first state is greater than the biasing force applied to the first holding portion 41 by the pre-tensioned spring 60. In the first state, the first holding portion 41 resists the biasing force of the spring 60 and prevents the movable electrode 20 from moving toward the fixed electrode 10.

[0063] In the high-speed inserter 102, when the insertion operation is started, it is switched from the above-described first state to the second state shown in FIG. 5. At the time of switching, a force that is greater than the frictional force generated between the first holding portion 41 and the guide portion 30 in the first state and that can compress the first holding portion 41 by the difference between the distance L3 and the distance L4 in the second direction DR2 is applied from the drive portion 50 and the spring 60. As a result, the first holding portion 41 moves in the first direction DR1 together with the movable electrode 20, slides with respect to the third guide surface 35A, and is further compressed in the second direction DR2 by the difference between the distance L3 and the distance L4. Further, the first holding portion 41 slides with respect to the second guide surface 34A in a state of being compressed in the second direction DR2. As a result, the movable electrode 20 is guided by the guide portion 30 together with the first holding portion 41 and moves in the first direction DR1 to reach the second position.

[0064] In the first state, the width of a part of the first holding portion 41 in the circumferential direction is equal to the distance L3 in the second direction DR2 between the first guide surface 33A and the side surface 20B of the movable electrode 20. In the second state, the width of a part of the first holding portion 41 in the circumferential direction is equal to the distance L4 in the second direction DR2 between the second guide surface 34A and the side surface 20B of the movable electrode 20.

[0065] In the high-speed inserter 102, the guide surface 30A has a first guide surface 33A facing the side surface 20B of the movable electrode 20 at the first position in the second direction DR2 and a second guide surface 34A facing the side surface 20B of the movable electrode 20 at the second position in the second direction DR2. The second guide surface 34A protrudes closer to the movable electrode 20 side than the first guide surface 33A in the second direction DR2.

[0066] In the high-speed inserter 102, when the movable electrode 20 moves from the first position to the second position, the first holding portion 41 needs to be compressed in the second direction DR2. Therefore, in the high-speed inserter 102, the movable electrode 20 at the first position can be held more reliably than in the high-speed inserter 101.

[0067] In the high-speed inserter 102, the third guide surface 35A is inclined with respect to each of the first guide surface 33A and the second guide surface 34A so as to approach the movable electrode 20 in the second direction DR2 as it goes toward the second guide surface 34A in the first direction DR1. When a force in the first direction DR1 is applied to the movable electrode 20 and the first holding portion 41 by the drive portion 50 and the spring 60, a component force along the third guide surface 35A is generated in the first holding portion 41, so that the compression of the first holding portion 41 in the second direction DR2 can be smoothly performed.

[0068] Embodiment 3. As shown in FIGS. 6 to 9, the high-speed inserter 102 according to Embodiment 3 has the same configuration and effects as those of Embodiment 1 described above unless otherwise specified. Therefore, the same components as those in Embodiment 1 described above are denoted by the same reference numerals, and the description thereof will not be repeated.

[0069] In the high-speed inserter 103, the guide surface 30A of the guide portion 30 has a first guide surface 33A, a second guide surface 34A, and a third guide surface 35A. The first guide surface 33A faces the side surface 20B of the movable electrode 20 at the first position in the second direction DR2. The second guide surface 34A faces the side surface 20B of the movable electrode 20 at the second position in the second direction DR2. The second guide surface 34A is disposed closer to the fixed electrode 10 than the first guide surface 33A in the first direction DR1.

[0070] In the high-speed inserter 103, the third guide surface 35A protrudes toward the movable electrode 20 side more than each of the first guide surface 33A and the second guide surface 34A in the second direction DR2. The shortest distance L5 in the second direction DR2 between the third guide surface 35A and the side surface 20B of the movable electrode 20 is shorter than the distance L3 in the second direction DR2 between the first guide surface 33A and the side surface 20B of the movable electrode 20. The shortest distance L5 is shorter than the distance L4 in the second direction DR2 between the second guide surface 34A and the side surface 20B of the movable electrode 20. The distance L4 in the second direction DR2 between the second guide surface 34A and the side surface 20B of the movable electrode 20 is, for example, shorter than the distance L3 in the second direction DR2 between the first guide surface 33A and the side surface 20B of the movable electrode 20. The distance L3 and the distance L4 are smaller than the width W0 of the first holding portion 41. In the high-speed inserter 103, the magnitude relationship between the distance L3 and the distance L4 is not particularly limited.

[0071] As shown in FIG. 7, the third guide surface 35A has, for example, a first inclined portion 35A1 and a second inclined portion 35A2. The first inclined portion 35A1 is inclined with respect to each of the first guide surface 33A and the second guide surface 34A so as to approach the movable electrode 20 in the second direction DR2 as it goes toward the second guide surface 34A in the first direction DR1. The second inclined portion 35A2 connects between the first inclined portion 35A1 and the second guide surface 34A. The second inclined portion 35A2 is inclined with respect to each of the first guide surface 33A and the second guide surface 34A. The inner angle θ2 sandwiched between the second inclined portion 35A2 and the second guide surface 34A is larger than the inner angle θ1 sandwiched between the first guide surface 33A and the first inclined portion 35A1. Preferably, the inner angle θ1 is larger than π radians and smaller than 3π / 2 radians. Preferably, the inner angle θ2 is 3π / 2 radians or more and smaller than 2π radians. The second inclined portion 35A2 is orthogonal to the first direction DR1, for example.

[0072] The first inclined portion 35A1 is disposed between the first guide surface 33A and the second inclined portion 35A2 in the first direction DR1. The second inclined portion 35A2 is disposed between the first inclined portion 35A1 and the second guide surface 34A in the first direction DR1.

[0073] The third guide surface 35A further has, for example, a connecting portion 35A3 that connects between the first inclined portion 35A1 and the second inclined portion 35A2. The connecting portion 35A3 extends, for example, along the first direction DR1. The connecting portion 35A3 may be inclined with respect to the first direction DR1. The third guide surface 35A may not have the connecting portion 35A3.

[0074] The guide portion 30 has a convex portion 37 that protrudes inward in the second direction DR2 from the first guide surface 33A. The convex portion 37 is continuous, for example, in the circumferential direction with respect to the central axis CA. The third guide surface 35A is the surface of the convex portion 37. The second guide surface 34A is disposed closer to the fixed electrode 10 side than the convex portion 37 in the first direction DR1. Note that the guide portion 30 may have a plurality of convex portions 37 that are spaced apart from each other in the circumferential direction with respect to the central axis CA.

[0075] In the high-speed inserter 103, it is held in the first state shown in FIG. 6 until the insertion operation is started due to, for example, detection of an abnormality in the module circuit. In the first state, the first holding portion 41 is compressed in the second direction DR2 by the difference between the width W0 and the width W1. The frictional force generated between the first holding portion 41 and the guide portion 30 in the first state is greater than the biasing force applied to the first holding portion 41 by the pre-tensioned spring 60. In the first state, the first holding portion 41 resists the biasing force of the spring 60 and prevents the movable electrode 20 from moving toward the fixed electrode 10.

[0076] In the high-speed inserter 103, when the insertion operation is started, it is switched from the above-described first state through the state shown in FIG. 8 to the second state shown in FIG. 9. At the time of switching, a force that is greater than the frictional force generated between the first holding portion 41 and the guide portion 30 in the first state and that can compress the first holding portion 41 by the difference between the distance L3 and the distance L4 in the second direction DR2 is applied to the first holding portion 41 from the drive portion 50 and the spring 60 via the movable electrode 20. As a result, the first holding portion 41 moves in the first direction DR1 together with the movable electrode 20. The first holding portion 41 slides with respect to the first inclined portion 35A1 of the third guide surface 35A and is further compressed in the second direction DR2 by the difference between the distance L3 and the distance L4. The first holding portion 41 slides with respect to the connection portion 35A3 in a state compressed in the second direction DR2 and reaches the second guide surface 34A. The first holding portion 41 slides with respect to the second guide surface 34A in a state compressed in the second direction DR2. As a result, the movable electrode 20 is guided by the guide portion 30 together with the first holding portion 41 and moves in the first direction DR1 to reach the second position.

[0077] In the first state, the width of a part of the first holding portion 41 in the circumferential direction is equal to the distance L3 in the second direction DR2 between the first guide surface 33A and the side surface 20B of the movable electrode 20. In the second state, the width of a part of the first holding portion 41 in the circumferential direction is equal to the distance L4 in the second direction DR2 between the second guide surface 34A and the side surface 20B of the movable electrode 20.

[0078] As shown in FIG. 10, in the high-speed inserter 103, the second inclined portion 35A2 may be inclined with respect to each of the first guide surface 33A and the second guide surface 34A so as to move away from a movable electrode (not shown) in the second direction DR2 as it goes toward the second guide surface 34A in the first direction DR1.

[0079] In the high-speed inserter 103, the third guide surface 35A protrudes toward the movable electrode side more than each of the first guide surface 33A and the second guide surface 34A in the second direction DR2. Therefore, according to the high-speed inserter 103, it is possible to prevent the movable electrode 20 that has reached the second position from returning to the first position.

[0080] The third guide surface 35A has a first inclined portion 35A1 that is inclined with respect to each of the first guide surface 33A and the second guide surface 34A so as to approach the movable electrode 20 in the second direction DR2 as it goes toward the second guide surface 34A in the first direction DR1. When a force is applied to the movable electrode 20 and the first holding portion 41 in the first direction DR1 toward the fixed electrode 10 by the driving portion 50 and the spring 60, a component force along the first inclined portion 35A1 of the third guide surface 35A is generated in the first holding portion 41, so that the compression of the first holding portion 41 in the second direction DR2 can be smoothly performed.

[0081] The third guide surface 35A further has a second inclined portion 35A2 that is inclined with respect to each of the first guide surface 33A and the second guide surface 34A. The inner angle θ2 sandwiched between the second inclined portion 35A2 and the second guide surface 34A is larger than the inner angle θ1 sandwiched between the first guide surface 33A and the first inclined portion 35A1. In this way, even when a force is applied to the movable electrode 20 that has reached the second position in a direction away from the fixed electrode 10 in the first direction DR1, the compression of the first holding portion 41 in the second direction DR2 cannot be smoothly performed, so that the movable electrode 20 that has reached the second position can be prevented from returning to the first position.

[0082] Embodiment 4. As shown in FIGS. 11 to 13, the high-speed inserter 104 according to Embodiment 4 has the same configuration and effects as those of the above-described Embodiment 1 unless otherwise specified. Therefore, the same components as those in the above-described Embodiment 1 are denoted by the same reference numerals, and the description will not be repeated.

[0083] The high-speed inserter 104 includes a second holding portion 42 instead of the first holding portion 41 as a holding portion. The second holding portion 42 is provided so as to slide with the movable electrode 20 when the movable electrode 20 is pressed by the driving portion 50 and moves in the first direction DR1.

[0084] The second holding portion 42 is positioned with respect to the guide portion 30 and is provided so as to slide with respect to the movable electrode 20.

[0085] The second holding part 42 has a first part 42A fixed to the guide part 30 and a second part 42B in contact with the movable electrode 20.

[0086] The second holding part 42 is, for example, a plate-like member extending in the second direction DR2. The second holding part 42 has, for example, an annular shape when viewed from the first direction DR1. When viewed from the first direction DR1, the first part 42A is an outer peripheral part of the second holding part 42, and the second part 42B is an inner peripheral part of the second holding part 42.

[0087] The second holding part 42 is provided, for example, so as to deform with respect to the shape in the first state when the movable electrode 20 moves from the first position toward the second position. In the first state, the second holding part 42 prevents the movable electrode 20 from moving toward the fixed electrode 10 against the biasing force of the spring 60. In the second state, the second holding part 42 allows the movable electrode 20 to move toward the fixed electrode 10.

[0088] The guide part 30 has a fixing part 38 that fixes the first part 42A of the second holding part 42. The fixing part 38 is provided, for example, to sandwich the first part 42A of the second holding part 42 in the first direction DR1 and to prevent the second holding part 42 from moving outward in the second direction DR2. The fixing part 38 has conductivity. The fixing part 38 is provided, for example, as a part of the guide part 30. The first part 42A of the second holding part 42 may be fixed to the fixing part 38 using a conductive adhesive or the like.

[0089] A second groove part 39 is provided in the guide part 30 on the side of the fixed electrode 10 with respect to the fixing part 38 in the first direction DR1. The second groove part 39 can accommodate at least a part of the second part 42B bent toward the fixed electrode 10 with respect to the first part 42A. The fixing part 38 and the second groove part 39 are provided in the straight pipe part 31 of the guide part 30.

[0090] On the side surface 20B of the outer edge portion of the movable electrode 20, a third groove portion 25 is provided. The third groove portion 25 is recessed inward from the side surface 20B in the second direction DR2 and extends along the circumferential direction with respect to the central axis CA. The third groove portion 25 is, for example, an annular groove continuous in the circumferential direction with respect to the central axis CA. The third groove portion 25 is provided so as to accommodate the second portion 42B of the second holding portion 42. The third groove portion 25 has a pair of inner wall surfaces facing each other in the first direction DR1 and a bottom surface connecting the inner circumferential ends of the pair of inner wall surfaces. In the first state, the bottom surface of the third groove portion 25 faces the bottom surface of the second groove portion 39 in the second direction DR2.

[0091] The second portion 42B of the second holding portion 42 is provided so as to contact the inner wall surface facing the fixed electrode 10 side among the pair of inner wall surfaces of the third groove portion 25 in the first state.

[0092] In the high-speed switch 104, it is held in the first state shown in FIG. 11 until the switching operation is started due to, for example, detection of an abnormality in the module circuit. In the first state, the second holding portion 42 resists the biasing force of the spring 60 and prevents the movable electrode 20 from moving toward the fixed electrode 10.

[0093] In the high-speed switch 104, when the switching operation is started, it is switched from the first state to the second state shown in FIG. 12. At the time of switching, a force capable of bending the second portion 42B of the second holding portion 42 toward the fixed electrode 10 side with respect to the first portion 42A is applied to the second holding portion 42 via the movable electrode 20 by the drive portion 50 and the spring 60. As a result, the second portion 42B of the second holding portion 42 is bent toward the fixed electrode 10 side with respect to the first portion 42A. As a result, the second holding portion 42 allows the movable electrode 20 to move toward the fixed electrode 10. Thereby, the movable electrode 20 is guided by the guide portion 30 and moves in the first direction DR1 to reach the second position.

[0094] In the high-speed inserter 104, the second holding part 42 is positioned with respect to the guide part 30 and slides with respect to the movable electrode 20. When the movable electrode 20 moves from the first position toward the second position, the second part 42B of the second holding part 42 is bent toward the fixed electrode 10 side more than the first part 42A. When the second holding part 42 is pressed in the first direction DR1 by the driving part 50 via the movable electrode 20, it can no longer prevent the movement of the movable electrode 20, and the second part 42B is bent toward the fixed electrode 10 side with respect to the first part 42A and slides with respect to the side surface 20B of the movable electrode 20. In the high-speed inserter 104, the direction of the pressing force applied to the movable electrode 20 and the second holding part 42 to insert the movable electrode 20 into the fixed electrode 10 is the same as the moving direction of the movable electrode 20. Therefore, similar to the high-speed inserter 101, the high-speed inserter 104 can also execute the insertion operation of inserting the movable electrode 20 into the fixed electrode 10 as a one-step operation, so that the insertion operation can be speeded up compared with the above-described conventional high-speed inserter.

[0095] In the high-speed inserter 104, a second groove part 39 capable of accommodating at least a part of the second part 42B of the second holding part 42 is provided on the fixed electrode 10 side of the guide part 30 rather than the fixed part 38. Thereby, interference between the second part 42B of the second holding part 42 and the guide part 30 accompanying the above deformation can be suppressed. The above deformation of the second holding part 42 can be performed smoothly and at high speed without being hindered by the guide part 30.

[0096] The second holding part 42 is a plate-like member extending in the second direction DR2. The second holding part 42 has an annular shape when viewed from the first direction DR1. When viewed from the first direction DR1, the first part 42A is an outer peripheral part of the second holding part 42, and the second part 42B is an inner peripheral part of the second holding part 42. Since adjustment of the strength of the second holding part 42 is easy in this way, the insertion operation is also stabilized in the high-speed inserter 104 compared with the conventional high-speed inserter. Also, the holding force of the second holding part 42 can be set to be larger than the holding force of the first holding part 41. Therefore, in the high-speed inserter 104, the biasing force of the spring 60 can be increased compared with the high-speed inserter 101, and the insertion speed can be increased.

[0097] In the high-speed inserter 104, the second holding part 42 is not limited to the structure shown in FIGS. 11 to 13.

[0098] As shown in FIG. 14, the second holding part 42 may have an annular part 43 having an annular shape as viewed from the first direction DR1, and a plurality of protruding parts 44 protruding inward from the annular part 43. The annular part 43 is the first part 42A. Each of the plurality of protruding parts 44 is the second part 42B.

[0099] As shown in FIG. 15, for example, the dimension T (thickness) of the plurality of protruding parts 44 in the first direction DR1 is equal to the dimension (thickness) of the annular part 43 in the first direction DR1.

[0100] As shown in FIG. 16, for example, the dimension T (thickness) of the plurality of protruding parts 44 in the first direction DR1 may be thinner than the dimension (thickness) of the annular part 43 in the first direction DR1.

[0101] According to the second holding part 42 shown in FIGS. 14 to 16, the adjustment of the holding force of the second holding part 42 becomes even easier than the second holding part 42 shown in FIG. 13.

[0102] As shown in FIG. 17, the fixing part 38 of the guide part 30 may be provided as a member separate from the guide part 30. The fixing part 38 may be composed of a plurality of members. The fixing part 38 may constitute a part of the second groove part 39.

[0103] Such a guide part 30 and the second holding part 42 can be easily assembled. Embodiment 5. As shown in FIGS. 18 and 19, the high-speed inserter 105 according to Embodiment 5 has the same configuration and effects as those of the above-described Embodiment 1 and Embodiment 4 unless otherwise specified. Therefore, the same components as those in the above-described Embodiment 1 and Embodiment 4 are denoted by the same reference numerals, and the description will not be repeated.

[0104] The high-speed inserter 105 includes a first holding part 41 and a second holding part 42. The first holding part 41 has the same configuration as the first holding part 41 of the high-speed inserters 101 to 103. The second holding part 42 has the same configuration as the second holding part 42 of the high-speed inserter 104.

[0105] The first holding part 41 is arranged closer to the fixed electrode 10 than the second holding part 42 in the first direction DR1. In the high-speed inserter 105, the movable electrode 20 is provided with a first groove part 23 and a third groove part 25. The guide part 30 has a guide surface 30A closer to the fixed electrode 10 than the second groove part 39 in the first direction DR1.

[0106] In the high-speed inserter 105, it is held in the first state shown in FIG. 18 until the insertion operation is started due to, for example, detection of an abnormality in the module circuit. In the first state, the first holding part 41 and the second holding part 42 prevent the movable electrode 20 from moving toward the fixed electrode 10 against the biasing force of the spring 60.

[0107] In the high-speed inserter 105, when the insertion operation is started, it is switched from the first state to the second state shown in FIG. 19. At the time of switching, a force greater than the frictional force generated between the first holding part 41 and the guide part 30 in the first state is applied to the first holding part 41 via the movable electrode 20 by the drive part 50 and the spring 60. Further, a force capable of bending the second part 42B of the second holding part 42 toward the fixed electrode 10 with respect to the first part 42A is applied to the second holding part 42 via the movable electrode 20 by the drive part 50 and the spring 60. As a result, the first holding part 41 and the second holding part 42 allow the movable electrode 20 to move toward the fixed electrode 10. As a result, the movable electrode 20 is guided by the guide part 30 together with the first holding part 41 and moves in the first direction DR1 to reach the second position.

[0108] In the high-speed inserter 105, the guide part 30 may have the same configuration as the guide part 30 of the high-speed inserters 102 and 103 according to the second or third embodiment.

[0109] Since the high-speed switch 105 has the same configuration as the high-speed switches 101 and 104, it has the same effects as those of the high-speed switches 101 and 104 respectively.

[0110] As described above, the high-speed switches 101 to 105 according to Embodiments 1 to 5 are applicable to any electrical device. Hereinafter, as an application example of the high-speed switches 101 to 105 according to Embodiments 1 to 5, a power conversion device will be described.

[0111] Embodiment 6. The power conversion device according to Embodiment 6 includes a plurality of power control circuits 200. The plurality of power control circuits 200 are connected in series with each other. The power control circuit 200 includes terminals A, B, a module circuit 210, and a high-speed switch 100.

[0112] The terminals A and B are connected to the upper system (for example, an AC power system) of the power conversion device. The module circuit 210 has a switching element 211 and an electrical energy accumulator 212. The switching element 211 has, for example, an insulated gate bipolar transistor (IGBT) or a thyristor. The electrical energy accumulator 212 has, for example, a capacitor.

[0113] The high-speed switch 100 is any one of the high-speed switches 101 to 105. The high-speed switch 100 is electrically connected in parallel to the module circuit 210. The fixed electrode (first main electrode) of the high-speed switch 100 is connected to one of the input terminal and the output terminal of the module circuit 210. The guide portion (second main electrode) of the high-speed switch 100 is connected to the other of the input terminal and the output terminal of the module circuit 210.

[0114] When the module circuit 210 is operating normally, current flows through the module circuit 210 and does not flow through the high-speed switch 100. When the module circuit 210 fails, the high-speed switch 100 operates, and terminals A and B are short-circuited. In the high-speed switch 100, the above-described switching operation is performed. As a result, in the power control circuit 200, current flows through the high-speed switch 100 and bypasses the failed module circuit 210. Since the failed module circuit 210 can be excluded from the current path, it is possible to prevent the influence of the failed module circuit 210 from spreading to other power control circuits 200 and the higher-level system of the power control circuit 200. Therefore, in the power conversion device according to the present embodiment, the remaining power control circuits 200 and their higher-level systems can continue operation without being affected by the failed module circuit 210. Further, in the power conversion device, when the number of power control circuits 200 has redundancy, the power conversion device can continue normal operation.

[0115] Also, when the module circuit 210 fails, an arc may occur in the module circuit 210. When the arc generation time becomes long, there is an increased possibility that the peripheral components of the module circuit 210 are damaged or destroyed with an explosion. In the power conversion device according to the present embodiment, since the high-speed switch 100 operates at high speed, the arc generation time can be shortened, and damage to peripheral components and destruction with an explosion can be prevented. The power conversion device according to the present embodiment has high explosion-proof performance.

[0116] Embodiment 7. FIG. 21 is a single-line connection diagram showing an example of the secondary side of a transformer of the power receiving and distributing facility 220 according to Embodiment 7. The power receiving and distributing facility 220 distributes AC power supplied from a power transmission system to load-side circuits 228 such as elevators, air conditioners, and lighting.

[0117] As shown in FIG. 21, the power receiving and distributing facility 220 according to Embodiment 7 includes a transformer 221 and a plurality of switchgears 222 and 223.

[0118] The transformer 221 steps down the high-voltage power received from the power transmission system. A plurality of switchgears 222 are installed between the transformer 221 and the busbar 226. Each switchgear 222 includes a high-speed switch 100 and a circuit breaker 224. The high-speed switch 100 is any one of the high-speed switches 101 to 105. One of the fixed electrode 10 and the movable electrode 20 of the high-speed switch 100 is electrically connected to the receiving-side electrode (one of the electrodes connected to the power transmission system side) of the circuit breaker 224. The other of the fixed electrode 10 and the movable electrode 20 of the high-speed switch 100 is electrically connected to the ground conductor.

[0119] The plurality of switchgears 223 include the switchgears 223 installed on the busbar and the plurality of switchgears 223 installed between the busbar 226 and each of the plurality of load-side circuits 228. Each switchgear 223 does not include, for example, the high-speed switch 100.

[0120] When there is no arc accident (internal arc accident) such as ground fault or short circuit in each of the plurality of switchgears 222 and the plurality of switchgears 223, the current flows through the circuit breaker 224 in the switchgear 222 and does not flow into the high-speed switch 100. When an arc accident occurs in any of the plurality of switchgears 222, the high-speed switch 100 in the switchgear 222 where the accident occurs performs the above-described closing operation, the arc current flows through the high-speed switch 100, and the arc is extinguished. Further, the switchgear 222 where the accident occurs and the lower system of the switchgear 222 are excluded from the current path of the power distribution equipment 220. When an arc accident occurs in any of the plurality of switchgears 223, the high-speed switch 100 in the switchgear 222 of the upper system of the switchgear 223 where the accident occurs performs the above-described closing operation, the arc current flows through the high-speed switch 100, and the arc is extinguished. Further, the lower system (including the switchgear 223 where the accident occurs) of the switchgear 222 in which the closing operation is performed is excluded from the current path of the power distribution equipment 220. As a result, in the power distribution equipment 220, it is possible to prevent the influence of the switchgears 222 and 223 where the accident occurs from spreading to a healthy current path that does not include the switchgears 222 and 223, and the operation of the healthy current path and the load-side circuit 228 powered from the healthy current path can be continued.

[0121] The embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is shown not by the description of the above-described embodiments but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Description of Reference Numerals

[0122] 1 Container, 2 First lid part, 3 First pipe part, 4 Second pipe part, 5 Second lid part, 10 Fixed electrode, 10A Top surface, 11 Bottom, 12 First protrusion, 20 Movable electrode, 20A Top surface, 20B Side surface, 21 Body part, 22 Second protrusion, 23 First groove part, 24 Insulating member, 25 Third groove part, 30 Guide part, 30A Guide surface, 31 Straight pipe part, 32 Flange part, 33A First guide surface, 34A Second guide surface, 35A Third guide surface, 35A1 First inclined part, 35A2 Second inclined part, 35A3 Connection part, 36, 37 Convex part, 38 Fixed part, 39 Second groove part, 41 First holding part, 42 Second holding part, 42A First part, 42B Second part, 43 Annular part, 44 Protruding part, 50 Driving part, 51 Cylinder tube, 52 Rod, 60 Spring, 100, 101, 102, 103, 104, 105 High-speed inserter, 200 Power control circuit, 201 Switching element, 202 Electrical energy accumulator, 210 Module circuit, 221 Transformer, 222, 223 Switch gear, 224 Circuit breaker, 226 Bus bar, 228 Load side circuit.

Claims

1. A fixed electrode, a movable electrode movable in a first direction toward the fixed electrode, a guide portion for guiding the movement of the movable electrode in the first direction, a holding portion capable of holding the movable electrode spaced apart from the fixed electrode with respect to the guide portion, and a driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode, wherein the holding portion can hold the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion, and when the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction, the movable electrode slides with at least one of the movable electrode and the guide portion, an insulating member, and a spring for biasing the movable electrode toward the fixed electrode via the insulating member, wherein the holding portion is elastically deformable in a second direction orthogonal to the first direction and electrically connects between the movable electrode and the guide portion, when the movable electrode is not pressed by the driving portion, the frictional force generated between the holding portion and the guide portion is greater than the biasing force applied to the holding portion by the pre-stored spring, and the holding portion prevents the movable electrode from moving toward the fixed electrode against the biasing force of the spring, when the movable electrode biased by the spring is pressed by the driving portion and a force greater than the frictional force is applied to the holding portion via the movable electrode by the driving portion and the spring, the holding portion allows the movable electrode to move toward the fixed electrode, a high-speed inserter.

2. A fixed electrode, a movable electrode movable in a first direction toward the fixed electrode, a guide portion for guiding the movement of the movable electrode in the first direction, a holding portion capable of holding the movable electrode spaced apart from the fixed electrode with respect to the guide portion, and a driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode, wherein the holding portion can hold the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion, and when the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction, the movable electrode slides with at least one of the movable electrode and the guide portion, wherein the holding portion has a first holding portion, The first holding portion is positioned with respect to the movable electrode, and slides with respect to the guide portion as the movable electrode moves. The movable electrode is movable from a first position spaced apart from the fixed electrode in the first direction to a second position in contact with the fixed electrode. The guide portion has a guide surface for guiding the first holding portion when the movable electrode moves from the first position to the second position. The movable electrode has side surfaces facing the guide surface of the guide portion in a second direction orthogonal to the first direction at each of the first position and the second position. A first groove portion is provided on the side surface of the movable electrode. The first holding portion is in contact with each of the guide surface and the bottom surface of the first groove portion. The guide surface has a first guide surface facing the side surface of the movable electrode at the first position in the second direction, and a second guide surface facing the side surface of the movable electrode at the second position in the second direction. The second guide surface protrudes toward the movable electrode side more than the first guide surface in the second direction, high-speed inserter.

3. A fixed electrode; A movable electrode movable in a first direction toward the fixed electrode; A guide portion for guiding the movement of the movable electrode in the first direction; A holding portion capable of holding the movable electrode spaced apart from the fixed electrode with respect to the guide portion; A driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode, and The holding portion is capable of holding the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion, and slides with at least one of the movable electrode and the guide portion when the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction. The holding portion has a first holding portion. The first holding portion is positioned with respect to the movable electrode, and slides with respect to the guide portion as the movable electrode moves. The movable electrode is movable from a first position spaced apart from the fixed electrode in the first direction to a second position in contact with the fixed electrode. The guide portion has a guide surface for guiding the first holding portion when the movable electrode moves from the first position to the second position. The movable electrode has side surfaces facing the guide surface of the guide portion in a second direction orthogonal to the first direction at each of the first position and the second position. A first groove portion is provided on the side surface of the movable electrode. The first holding portion is in contact with each of the guide surface and the bottom surface of the first groove portion. The guide portion has a first guide surface facing the side surface of the movable electrode in the first position in the second direction, a second guide surface facing the side surface of the movable electrode in the second position in the second direction, and a third guide surface connecting between the first guide surface and the second guide surface. The third guide surface protrudes toward the movable electrode side more than each of the first guide surface and the second guide surface in the second direction.

4. A fixed electrode, A movable electrode movable in a first direction toward the fixed electrode, A guide portion for guiding the movement of the movable electrode in the first direction, A holding portion capable of holding the movable electrode separated from the fixed electrode with respect to the guide portion, And a driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode. The holding portion can hold the movable electrode with respect to the guide portion when the movable electrode is not pressed by the driving portion, and slides with at least one of the movable electrode and the guide portion when the movable electrode pressed toward the fixed electrode by the driving portion moves in the first direction. The holding portion has a first holding portion. The first holding portion is positioned with respect to the movable electrode and slides with respect to the guide portion as the movable electrode moves. The holding portion further has a second holding portion. The second holding portion is positioned with respect to the guide portion and slides with respect to the movable electrode.

5. A fixed electrode, A movable electrode movable in a first direction toward the fixed electrode, A guide portion for guiding the movement of the movable electrode in the first direction, A holding portion capable of holding the movable electrode separated from the fixed electrode with respect to the guide portion, And a driving portion capable of pressing the movable electrode held by the holding portion toward the fixed electrode. When the movable electrode is not pressed by the driving unit, the holding unit can hold the movable electrode with respect to the guide unit. When the movable electrode pressed by the driving unit toward the fixed electrode moves in the first direction, it slides with at least one of the movable electrode and the guide unit. The holding unit has a second holding unit. The second holding unit is positioned with respect to the guide unit and slides with respect to the movable electrode. The movable electrode is movable from a first position spaced apart from the fixed electrode in the first direction to a second position in contact with the fixed electrode. The second holding unit has a first portion fixed to the guide unit and a second portion in contact with the movable electrode. When the movable electrode moves from the first position toward the second position, the second portion is bent toward the fixed electrode side more than the first portion, high-speed inserter.

6. The high-speed inserter according to claim 1, wherein the spring can bias the movable electrode in contact with the fixed electrode toward the fixed electrode.

7. Comprising a container in which an insulating space is formed. The fixed electrode and the guide unit constitute a part of the container. The high-speed inserter according to any one of claims 1 to 6, wherein at least a part of the movable electrode, the holding unit, and the driving unit is disposed in the container.

8. Each of the first guide surface and the second guide surface extends along the first direction. The guide surface further has a third guide surface connecting between the first guide surface and the second guide surface. The high-speed inserter according to claim 2, wherein the third guide surface is inclined with respect to each of the first guide surface and the second guide surface so as to approach the movable electrode in the second direction as it goes toward the second guide surface in the first direction.

9. The high-speed inserter according to claim 3, wherein the third guide surface has a first inclined portion inclined with respect to each of the first guide surface and the second guide surface so as to approach the movable electrode in the second direction as it goes toward the second guide surface in the first direction.

10. The third guide surface further has a second inclined portion disposed between the first inclined portion and the second guide surface in the first direction. The interior angle θ sandwiched between the second inclined portion and the second guide surface 2 is larger than the interior angle θ sandwiched between the first guide surface and the first inclined portion, and is the high-speed inserter according to claim 9. 1 ​

11. The inner angle θ 1 is greater than π radians and less than 3π / 2 radians, the inner angle θ 2 The high-speed inserter according to claim 10, wherein the inner angle θ is equal to or more than 3π / 2 radians and less than 2π radians.

12. The first holding unit is a spring coil. The spring coil is bent in a ring shape so as to surround the movable electrode as viewed from the moving direction of the movable electrode, and is compressed in the radial direction with respect to the center of the movable electrode. The high-speed switch according to any one of claims 2 to 4.

13. The movable electrode is movable from a first position spaced apart from the fixed electrode in the first direction to a second position in contact with the fixed electrode. The second holding portion has a first portion fixed to the guide portion and a second portion in contact with the movable electrode. When the movable electrode moves from the first position toward the second position, the second portion is bent toward the fixed electrode side more than the first portion. The high-speed switch according to claim 4.

14. The guide portion has a fixed portion that fixes the first portion. A second groove portion capable of accommodating at least a part of the second portion is provided on the fixed electrode side of the guide portion with respect to the fixed portion. The high-speed switch according to claim 5.

15. The second holding portion is a plate-like member extending in a direction orthogonal to the first direction. The second holding portion has an annular shape as viewed from the first direction. As viewed from the first direction, the first portion is an outer peripheral portion of the second holding portion, and the second portion is an inner peripheral portion of the second holding portion. The high-speed switch according to claim 5 or 14.

16. The second holding portion is a plate-like member extending in a direction orthogonal to the first direction. The second holding portion has an annular portion having an annular shape as viewed from the first direction and a plurality of protruding portions protruding inward from the annular portion. The annular portion is the first portion, and each of the plurality of protruding portions is the second portion. The high-speed switch according to claim 5 or 14.

17. A high-speed switch according to any one of claims 1 to 6, and a module circuit, wherein the high-speed switch is electrically connected in parallel to the module circuit. A power conversion device.

18. A high-speed switch according to any one of claims 1 to 6, a circuit breaker, and a ground conductor, wherein one of the fixed electrode and the movable electrode of the high-speed switch is electrically connected to one pole of the circuit breaker, and the other of the fixed electrode and the movable electrode of the high-speed switch is electrically connected to the ground conductor. A power receiving and distributing facility.

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