KR910006238B1 - Vacuum intakaputa - Google Patents

Abstract

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Description

Vacuum Interlator (INTERRUPTER)

1 is a longitudinal sectional view of one seed field application anticorrosive vacuum interceptor according to the prior art.

2 is a perspective view showing one electrode of another seed field application anticorrosive vacuum interlator according to the prior art.

3 is an explanatory plan view of a state where the arc is biased in the contact electrode of another seed field application type vacuum interlator according to the prior art.

4 is a longitudinal cross-sectional view of a seed field application type vacuum interlator according to a first embodiment of the present invention.

5 is a longitudinal cross-sectional view of the movable composite electrode shown in FIG.

6 is a plan view of the first coil electrode shown in FIG.

FIG. 7 is a plan view of the second coil electrode shown in FIG.

8 is a plan view of the reinforcing member shown in FIG.

Fig. 9 is a gravure showing the relationship between the ratio of the length of the divided shots to the magnetic flux density and phase of the seed field with respect to the length of the circumferential direction between the joined radial warps of the electrodes of the first coil.

10 is a longitudinal sectional view of a composite electrode according to a second embodiment of the present invention.

11 is a perspective view of the roughness of the composite electrode shown in FIG.

12 is a perspective view of the reinforcing member shown in FIG.

FIG. 13 is a graph showing the relationship between the ratio of the length of the cutout to the radius of the contact electrode shown in FIG. 11 and the magnetic flux density of the seed field and the delay of the phase.

14 is a longitudinal sectional view of a composite electrode according to a third embodiment of the present invention.

FIG. 15 is an assembled perspective view of the composite electrode shown in FIG. 14. FIG.

16 is a perspective view of the reinforcing member shown in FIG.

17 is an assembled perspective view of a composite electrode according to a fourth embodiment of the present invention.

FIG. 18 is a graph showing the relationship between the magnetic flux density of the seed field of the composite electrode and the conventional composite electrode shown in FIG. 17 and the distance and ratio at the center of the contact electrode with respect to the radius of the contact electrode.

FIG. 19 is a graph showing the relationship between the residual magnetic flux of the seed field of the composite electrode and the conventional composite electrode shown in FIG. 17 and the ratio of the distance from the center of the contact electrode to the radius of the contact electrode.

The present invention relates to a vacuum interraft used for a high power converter, for example a high flow converter, in particular an arc current flowing between these contact electrodes when a single contact electrode contacts or opens in a vacuum vessel. The present invention relates to a vacuum interlator of a seed field application method in which a magnetic field (hereinafter referred to as a seed field) parallel to the longitudinal axis of the field is applied and the blocking ability is increased.

The seed application system vacuum interamplifier is uniformly dispersed in the space between the contact electrodes opened by the seed field as if the arc is closed, thereby preventing local overheating of the contact electrode and increasing the blocking capability.

As an example of the above-mentioned seed field application vacuum inverter, what is conventionally shown in FIG. 1 is known. The vacuum interlator has an insulating cylinder 1 and a metal end plate 2 sealed at both open ends of the insulating cylinder 1, and a vacuum container 3 inside which is evacuated to a vacuum. (3) It has a set of fixed and movable contact electrodes (4) and (5) which are contacted or opened to open and close the circuit.

These fixed and movable contact electrodes 4 and 5 are discs and copper. Consisting of silver or an alloy of high electrical conductivity, the ball installed in the center of the metal end plate 2 is opened and directed in the vacuum container 3 in a vacuum-sealed state and exchanged. It is electrically and mechanically coupled to the respective inner ends of the fixed and movable reed rods 6 and 7 which turn off the electricity.

A seed field parallel to the longitudinal axis direction of the arc current flowing between these fixed and movable contact electrodes 4 and 5 is generated behind the fixed and movable contact electrodes 4 and 5. Coil electrodes 8 and 9 made of a high conductivity material are arranged spaced apart from the fixed and movable contact electrodes 4 and 5.

The fixed and movable contact electrodes 4 and 5 and the corresponding coil electrodes 8 and 9 are mechanically formed by the spacers 8a and 9a, which are made of a material having high electrical resistance in the center portion thereof. And are electrically connected by both conductors 8b and 9b at the periphery of the electrodes 4, 5, 8 and 9, respectively.

The coil electrodes 8 and 9 are contacted by the source current flowing through these coil electrodes 8 and 9 when the movable contact electrode 4 is in a position separated from the fixed contact electrode 5. A magnet is generated between the electrodes 4 and 5.

These magnets change in time and penetrate the interior of the contact electrodes 4 and 5 from their surfaces in the direction of the back side or vice versa. The fixed and movable contact electrodes 4 and 5 were rolled up and an almost cylindrical metal arc shield 10 was supported by the insulating cylinder 1 and installed.

In addition, the auxiliary shields 11 are supported by the metal end plates 2 on both sides of the arc shield 10.

The metal bellows 12 is vacuum sealed between the movable lead rod 7 and the metal end plate 2 for contacting or carrying the movable contact electrode 5 with respect to the fixed contact electrode 4.

The above-described vacuum interleaver is applied to the space between the fixed and movable contact electrodes 4 and 5 at the time of circuit break. It has a certain result in increasing the blocking ability according to the effect of the seed system.

However, in the above-described interrafter, the fixed and movable contact electrodes 4 and 5 are made of a material having a high conductivity of the magnetic flux that changes in time supplied by the coil electrodes 8 and 9. In order to penetrate, an overcurrent is generated inside these fixed and movable contact electrodes 4 and 5 so that the magnetic field supplied by the overcurrent weakens the seed field for supplying the coil electrodes 8 and 9.

In order to eliminate the inconvenience caused by the overcurrent of the fixed and movable contact electrodes 4 and 5 described above, for example, in the radial direction of the fixed and movable contact electrodes 13 and 14 as indicated in FIG. The fixed and movable contact electrodes 4 and 5 and the other fixed and movable contact electrodes 13 and 14 have been limited at the point where a plurality of slit 15 is provided. (See U.S.P 3,946, 179) The fixed and movable contact electrodes 13 and 14 have achieved a certain result in that crystals of the fixed and movable contact electrodes 4 and 5 shown in FIG.

However, the slit 15 greatly reduces the dielectric strength between the fixed and movable contact electrodes 13 and 14 by the etching thereof, and the mechanical strength of the fixed and movable contact electrodes 13 and 14 is also very low. It is a new cause. In addition, as the fixed and movable contact electrodes 13 and 14 block a large current of a high voltage several times, the slit 15 is buried by the metal vapor generated by arc and superimposed. As a result, a state in which the slits of the fixed and movable contact electrodes 13 and 14 do not exist is very low, so that the blocking capability of these fixed and movable contact electrodes 13 and 14 is very low.

In order to eliminate the irrationality of the fixed and contact electrodes 4, 5, 13, and 14 shown in FIGS. 1 and 2, materials having a% conductivity of 40% or less, for example, Verium CU- The fixed and movable contact electrodes 16 as shown in FIG. 3 differ from the fixed and movable contact electrodes 4 and 5 in FIG. 1 at the point of W, alloy or Ag-W alloy. It is limited. (See Japanese Patent Application Laid-Open No. 57-199126 of December 7, 1982) According to the fixed and movable contact electrode 16 disclosed in the prior art in Japanese Patent Application Laid-Open No. 57-199126, these contact electrodes 16 are not required to be provided with a slit. The result is a significant decrease in overcurrent generated in the process.

However, for example, when the fixed and movable contact electrodes 16 are used with the coil electrodes 8 and 9 as indicated in FIG. 2, the arc A as shown in FIG. Is knitted at the centrally-contacted portion 17 before being distributed to the entire surface of the fixed and movable contact electrode 16 by an external magnetic field or other influence.

For example, the arc currents i1, i2, i3, and i4 flowing from the coil electrode 9 to the fixed and movable contacts 16 through the respective transfers 9b. There is a difference in size, and the difference is enlarged as the conductivity of the fixed and movable contact electrodes 16 decreases, or the arc classification i1 is maximized, such that the arc currents i2, i3, and i4 are increased. ) Becomes almost zero. Therefore, the magnetic flux density of the seed field whose shape is applied to the inter-cap by the arc currents flowing through the coil electrodes 8 and 9 is maximized to the arc knitting position. In addition, the uniformity of the magnetic flux density is very detrimental only for the electric power between the poles. As a result, the current blocking capability of the fixed and movable contact electrodes 16 is very low.

Further, since the conductivity of the fixed and movable contact electrodes 16 is low, the temperature rise of the fixed and movable contact electrodes 16 increases at normal energization.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum interleaver which improves the uniformity of the magnetic flux density of a seed field applied to the space between contact electrodes at the time of circuit interruption and increases the magnetic flux density.

Another object of the present invention is to provide a vacuum intermitter having an increased high-voltage high-current blocking capability. In order to achieve these objects, the present invention is to provide an electrical insulating vacuum container with a whole and an inner end portion of a set of electrically conductive metal lids and lead rods, which are spoken so as to be movable relative to the inner side from the outside of the vacuum vessel. A contact electrode that is mechanically and electrically connected, at least one of which is composed of a metal material having a% conductivity of 40% or less, and a metal material having a higher conductivity than that of the contact electrode by mechanically and electrically front-facing the back surface of the one contact electrode. And coil electrodes which apply a seed field parallel to the longitudinal axis direction of the arc current flowing in the space between the contact electrodes.

According to this invention, the electric path inside the contact electrode is shortened so that main current flows through the thickness of the contact electrode substantially between the contact electrode coil electrodes, and the temperature rise of a contact electrode becomes small. In addition, with the increase in the voltage of the vacuum interlator, the seed field increased more than before even when the inter-cap is enlarged.

Another object of the present invention is to increase the breaking capability of high-voltage-to-current and to provide a vacuum interleaver having a durable contact electrode.

In order to achieve this object, at least one of the contact electrodes is not provided with a thread, and the coil electrode formed in a circular shape has a plurality of radial wafers and split turns, and each split turn has a tip of each radial wafer. In the circumferential direction, the circumferential direction is further provided with 75% or less of the circumferential length between radial warps in which the lengths of the divided turns are closely matched.

According to this invention, the mechanical strength of the contact electrode is large and the withstand voltage of the inter-pole cap is not lowered by the etching of the thread. In addition, it is described in detail with reference to the accompanying drawings by strengthening the applied seed field with a very small Li-Ge current between the radial wafers and the split wafer and the split coal which are opposed to each other.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 to 10 in the accompanying drawings.

In FIG. 4, the vacuum interlater according to the first embodiment of the present invention is made of glass or alumina ceramics. Moreover, two insulating cylinders 21 of the same length connected longitudinally by welding or soldering through the sealing bracket 20, and the sealing bracket 20 are interposed between the ends of the two openings of these insulating cylinders 21 are sealed. A set of metal end plates 22 of earth- or alloy-based stainless steel sealed by welding or soldering, the main part of which is composed of a vacuum vessel 25 exhausted into a vacuum, It has a fixed and movable composite electrodes 24 and 25 of. The substantially cylindrical metal arc shield 26 surrounding these fixed and movable composite electrodes 24 and 25 is hermetically welded to a sealing bracket 20 provided at the inner ends of the two openings of the two insulating cylinders 21. Or bonded together by soldering and at the same time supported electrically and mechanically.

In addition, a metal auxiliary plate 22 made of metal softening the electric field concentration at the edge of the sealing bracket 20 provided at the outer end of both openings of the both insulated cylinder 21 is joined to the one metal end plate 22 by welding or soldering. It is done. The length of each auxiliary shield 27 is set to be 1.1 to 3 times the length of the sealing fitting 20.

The arc and auxiliary seals 26 and 27 are made of austenitic stainless steel.

The fixed and movable composite electrodes 24 and 25 of the set are separated from each other when the metal vapor of the arc product generated in the space between these fixed and movable composite electrodes 24 and 25 is separated. The amount is small due to the seed material to be applied and the metallic material having a% conductivity of 40% or less of the connecting electrodes 28 and 38.

Therefore, the length of the arc seal 26 is shortened so that the vacuum cap between the opposing ends of the arc seal 26 and the auxiliary seal 27 is enlarged than the conventional vacuum cap and has a higher withstand voltage. . Therefore, the insulated cylinder 21 is formed shorter than the conventional one in the same withstand voltage.

Since the fixed composite electrode 24 and the movable composite electrode 25 have the same configuration, the movable composite electrode 25 will be described below.

As shown in FIGS. 4 and 5, the movable composite electrode 25 includes a first coil electrode 29 which is mechanically and electrically front bonded to the rear surface of the movable contact electrode 28 and the movable contact electrode 28. The second coil electrode 31 and the first and second coil electrodes 29 and 31 which are spaced apart from the first coil electrode 29 and mechanically and electrically coupled to the inner end of the movable lid rod 30. Between the sp-saft 32 and the first and second coil electrodes 29 and 31 which mechanically couple the central portions of the first and second coil electrodes 29 and 31 therebetween. The peripheral portions of the first and second coil electrodes 29 and 31 are electrically connected to each other by a reinforcing member 34 and a circumferential connection transfer conductor 33 and a second coil electrode 31.

Hereinafter, each opened member will be described in detail.

As shown in FIG. 5, first, the movable contact electrode 28 is thin and has a conical shape, and has a contact portion 28 at the center on the front side and a circle of the first coil electrode 29 at the center on the back side. The annular harp 35 has a circular convex part 35d to which it is mounted.

The movable contact electrode 28 is made of a material having a high mechanical strength, such as a barium Cu-W alloy, a Ca-Cr-Mo alloy, a Fe-Ni-Cr alloy, and a low conductivity, and having a% conductivity of 40% or less. For example, when the% conductivity becomes 2%, the magnetic flux of the seed field, which changes in time, penetrates through the movable contact electrode 28, so that the overcurrent generated inside the movable contact electrode 28 becomes extremely small. If the fixed and movable contact electrodes 38 and 28 are made of a material having high mechanical strength and low conductivity, the dielectric strength of the cap is also improved.

Subsequently, the first coil electrode 29 usually has an outer diameter less than or equal to the diameter of the contact electrode 28 and is made of a material having a high conductivity such as copper or copper alloy. Four radial turns 36 spoken in the radial direction with a 90 ° angular spacing at 35 and four split turns 37 spoke in the same direction on the same circumference at the outer ends of the angular directions 36. Has)

Thus, as described above, the half 35 radial wave 36 and the split turn portion 37 are formed on the rear surface of the movable contact electrode 28 by mechanically and electrically front soldering the movable contact electrode 28. Are bonded. At the front end of the split turn portion 37, a circular concave portion 37a for attaching and soldering the end portions of the copper connection whole 33 is provided.

The length of the dividing turn portion 37 is set to 75% or less of the length in the circumferential direction between the radial warps 36 joined together on the circumference including the dividing turn portion 37. However, when this% value is very small or when the division turn portion 37 is substantially absent, these division turns 37 cannot effectively generate a seed field. When the other% value exceeds the circumferential length of 75%, the leakage current flows from the leading end of one split turn portion 37 to the outer end of the radial wafer 36 proximate through the movable contact electrode 28. The magnetic flux density of the seed field applied by the first coil electrode 29 decreases rapidly, and the delay of the phase of the seed field increases rapidly, so that the fixed and movable contact electrodes (even if the circuit current becomes zero) are rapidly increased. An arc is left in the space between 38) and (28), and the circuit break is impossible. The first coil electrode 29 shown in FIG. 6 may be a 1/4 turn type, but not limited to this, and may be a 1/3 turn 1/2 turn or a 1 turn type. The relationship between the ratio of the length of the dividing turn portion 37 to the circumferential length between the radial warps 36, the magnetic flux density of the seed field and the delay of the phase of the seed field will be described later.

In addition, the first coil electrode 29 is mechanically and electrically connected to the rear surface of the movable contact electrode 28 by soldering, so that the fixed and movable contact electrodes 38 and 28 are increased in accordance with the high voltage of the vacuum interlator. Even when the inter-cap is larger, a seed field with a higher magnetic flux density is generated than in the prior art, and a current flows in the axial direction (through the thickness) of the movable contact electrode 28 and the radial direction of the movable contact electrode 28 is increased. Since there is little current flowing into the layer, it contributes to the reduction of the temperature rise of the movable contact electrode 28 by the material having a small% conductivity.

Subsequently, the second coil electrode 31 is also made of a material having a high electrical conductivity such as copper in the east of the first coil electrode 29. As shown in FIG. It has four radial wafers 40 spoken in the radial direction and four split turns 41 spoken in the same circumference on the same circumference at the outer ends of the radial wafers 40.

The extending direction of these division turns 41 is opposite to the extending direction of the division turns 37 of the first coil electrode 29.

A cap is provided between the tip of each dividing turn portion 41 and the radial wave 40. In addition, air 42 is provided at each end of each partial turn section 41 for deinterlacing and soldering a part of the connection conductor 33 of copper or copper alloy.

On the front side of the half 49, a circular recess 39a for attaching and soldering the outward side flange of one end of the spacer 32 is provided, and the inner end of the movable lid rod 30 is provided on the rear side of the half 39. A circular convex portion 39b for attaching the desorption solder is provided.

The second coil electrode 31 shown in FIG. 7 is a quarter turn type, and the second coil electrode 31 is not limited thereto but may be a 1/3 turn type 1/2 turn type or a 1 turn type.

The first and second coil electrodes 29 and 31 are electrically connected by soldering through the connecting conductor 33 so as not to face the radial wafers 36 and 40. The current flowing from the movable reed rod 30 to the movable contact electrode 28 flows in the same direction through the interior of the divided turns 37 and 41 of the first and second coil electrodes 29 and 31 in the same direction. In particular, when the length of the dividing turn portion 37 of the first coil electrode 29 is about 67% of the length in the circumferential direction between the radial wafers 36 to be joined, it is converted into a source current having an effect of about 1.5 turns. This greatly increases the magnetic flux density of the seed system.

Subsequently, the spacer 32 is used to separate the first and second coil electrodes 29 and 31 from each other, and is preferably as small as possible and electrical strength as high as possible.

Thus, for example, stainless steel or inconel are used. In addition, it is also possible to have a good insulating solder and a large insulated ceramic of mechanical strength. The spacer 32 has a unitary cylindrical shape with flanges outwardly at both ends, and the half 35 of the first coil electrode 29 and the half 39 of the second coil electrode 31 in these outward flanges. Was debonded. Finally, the reinforcing member 34 is composed of a material such as stainless steel with a small conductivity and a high mechanical strength in the spacer 32 and the East. The reinforcing member 34 is composed of a half 43 which is assembled on the outer circumference of the movable lid rod 30 and a plurality of support arms 44 which are radially protruded from the half 43.

Each outer end of these support arms 44 is super soldered to the second coil electrode 31. The support arm 44 includes a group of support arms 44 for supporting the front end portion 41a of the split turn portion 41 of the second coil electrode 31.

In this case, a composite electrode having a diameter of 100 mm% conductivity and a contact electrode of a disk and a first and second coil electrodes of 1/2 turn type having the same outer diameter as the elapsed time of these contact electrodes is used. When the cap is set to 15 mm, the seed field with the center position of the intercap is changed by changing the ratio 1 / L (%) of the length of the divided turn to the length of the circumferential direction between the radial warps of the first coil electrode. The magnetic flux density B (Gduss / KA) and the Q (lower phase) of the phase were measured. This measurement result is shown in FIG. In Fig. 9, the vertical axis on the left side represents the magnetic flux density B, and the right side on the right side represents Q, which is late in phase with respect to the phase of the arc current, and the horizontal axis is in Fig. 9, which represents the ratio of length 1 / L. Curve I _B represents the relationship between the ratio of length 1 / L ₁ and the magnetic flux density B of the seed field, and curve 1Q represents the relationship between 此 1 / L of the length and Q, which slows the phase of the seed field.

In the ninth point, when the ratio 1 / L of the length is about 67%, the magnetic flux density B of the seed field becomes the maximum and the increase rate of θ becomes slow.

In FIG. 9, the reduction ratio of the magnetic flux density B of the seed field is rapidly increased at the ratio of length 1 / L of about 75%, and the reduction ratio of the magnetic flux density B of the seed system is increased at the ratio of length 1 / L of about 77%. It turned out to be consistent.

Therefore, when the ratio 1 / L of the length is 75% or less, the first coil electrode 29 can be obtained although it is efficient in terms of the magnetic flux density B of the seed field and in the phase of the seed field.

Hereinafter, the composite electrode of the vacuum interamplifier according to the second embodiment of the present invention will be described. In this description, with respect to the constituent members equivalent to those of the composite electrodes 24 and 25 according to the first embodiment, the constituent members differ only from the constituent members of the composite electrodes 24 and 25. Explain.

As shown in FIG. 10, the composite electrode 50 includes the contact electrode 51 and the first and second coil electrodes 52 and the same as the fixed and movable composite electrodes 24 and 25 according to the first embodiment. And 53, spacer 54, connection conductor 33, and reinforcing member.

The members listed below will be described. As shown in FIG. 11, the contact electrode 51 has a concave portion 57 protruding substantially radially from the circumference thereof on the rear surface thereof. These convex portions 57 are formed in a cap between the radial wafer 58 of the first coil electrode 52 and the tip portion 59a of the split turn portion 59 proximate the radial wafer 58. Correspondingly installed, the longitudinal wave 58 and the tip portion 59a of the split turn portion 59 are prevented from electrically conducting at the shortest distance in the contact electrode 51 and are formed by the seed by the first coil electrode 52. This is to prevent the system from weakening.

Therefore, it is preferable that the length of the part 57 is more than the length of the radial direction of the said cap, and the width | variety of the rib part 57 is more than the width of the said cap.

In the contact electrode 51 shown in FIG. 11, the length of the recess 57 is about 20% of the radius of the contact electrode 51. FIG. The relationship between the ratio of the length of the fin 57 to the radius of the contact electrode 51 and the magnetic flux density and phase of the seed field will be described later.

The contact electrode 51 is made of a material having high mechanical strength and extremely low conductivity such as a Cu-Cr-Mo alloy (% conductivity 20% -40%) or a Fe-Ni-Cr alloy (% conductivity 20% or less). Consists of.

The first coil electrode 52 is a half turn type, and each cap between the radial wafer 58 and the tip portion 59a of the split turn 59 is the first coil electrode 29 according to the first embodiment. Extremely small compared to

That is, the length of each dividing turn part 59 is larger than 75% of the length in the 1/2 circumferential direction of the circumference including the dividing turn part 59.

Like the first coil electrode 52, the second coil electrode 53 has a half turn type, and has a half 60, a radial wave 61, and a split turn portion 62.

The spacer 54 is substantially the same as the spacer 32 according to the first embodiment.

The reinforcing member 56 is front-bonded to the second coil electrode 53, and as shown in FIG. 12, the harp 63 and the plurality of support arms 64 protruded in the radial direction from the harp 63. And an almost annular rim 65 which integrally couples the outer ends of these support arms 64.

A part of the rim 65 is provided with a cap at a position corresponding to each cap between the dividing turn 62 and each tip of the radial wafer 61 of the second coil electrode 53. Each cap of the reinforcing member 56, like the concave portion 57 of the contact electrode 51, also has the shortest path between one support arm 64 and its end of the rim 65 facing each other through the cap. This is to prevent the seed field caused by the second coil electrode 53 from being weakened by avoiding electrical conduction with.

The rim 65 is provided with a granular flange 66, and the granular flange 66 is attached to the outer circumferential surface of the split turn portion 62 of the second coil electrode 53.

Here, a contact electrode of a plate having a diameter of 100 mm%, a conductivity of 2% or 5%, and a shape of a disc is a composite electrode having first and second coil electrodes of 1/2 turn type of the same outer diameter of the contact electrodes. When the gap cap is set to 200mm, the ratio of the length of the tip to the radius of the contact electrode is changed by 1 / r (%), so that the magnetic flux density B (Gauss / KA) The phase degree at which a phase becomes slow was measured.

In FIG. 13, the vertical axis on the left side represents the magnetic flux density B, the vertical side on the right side represents θ which is out of phase, and the horizontal axis represents the ratio of the path 1 / r.

In Fig. 13, the cutoff lines IIB and IIθ show the relationship between the ratio 1 / r of the length and the magnetic flux density B of the seed field and the ratio 1 / r of the seed field when the% conductivity of the contact electrode is 2%, respectively. The relationship between θ of late phase is indicated, and the cut lines IIIB and IIIθ respectively indicate the relationship between the ratio 1 / r of the length and the magnetic flux density B of the seed field and the ratio 1 / r of the length when the% conductivity of the contact electrode is 10%. The relationship between the late phase of the seed system and θ is shown.

As shown in FIG. 13, it can be said that the performance of the contact electrode is better at 2% than when the% conductivity of the contact electrode is 10% from the viewpoint of the magnetic flux density B of the seed field and the late phase θ.

As shown in FIG. 13, the rate of increase of the magnetic flux density B of the seed field and the rate of decrease of the late phase θ are rapidly changed from large to small at a length ratio of 1 / r of 20%, respectively. The ratio of 1 / r is almost the same in 20% or more. Therefore, the magnetic flux density and the phase of the seed field may be installed in the contact electrode in the viewpoint of the late phase, so that the length of the insulation can be provided so that the ratio of length 1 / r is 20% or more.

Hereinafter, a composite electrode of a vacuum injector according to a third embodiment of the present invention will be described.

In this description, only components different from those of the composite electrode 50 will be described with respect to components equivalent to those of the composite electrode 50 according to the second embodiment.

As shown in FIG. 14, the composite electrode 70 is the same as the composite electrode 50 of the second embodiment with the contact electrode 71 and the first and second coils 72 and 73 and the sp- It consists of a stand 74, a connection conductor 33 and a reinforcing member 75.

The members listed below will be described.

As shown in FIG. 15, the contact electrode 71 has three threads 76 extending in the radial direction from the circumference thereof.

These threads 76 exhibit the same function as the recessed part 57 according to the second embodiment, so that the foregoing description of the recessed part 57 substantially matches the threaded 76.

In the case of the threaded 76, the electric conduction is conducted between the radial wave 78 of the first coil electrode 72 and the tip portion 79a of the split turn 79 that joins the first coil electrode 72 as compared with the recess portion 57. FIG. The longer the furnace, the smaller the leakage current through the conductive path, and the lower the phase θ of the seed field is, as the magnetic flux density B of the seed field increases.

The first coil electrode 72 is 1/3 turn type and is formed to be extremely thicker than the first coil electrode 52 according to the second embodiment, so that the half 77, three radial wafers 78, and three It is established as the dividing turn unit 79.

As shown in FIG. 15, the second coil 73 is not equal to the arcuate split turn portion in the three radial warps 81 extending in the radial direction from the harp 80 and the baffle 80. As shown in FIG. have.

In this case, the second coil electrode 73 has an extremely simple shape and is suitable for a small number of inter-electrode caps for converters of relatively low voltage. The spacer 74a has a corner portion having a rounded corner R between the cylindrical portion 74a and the outward flange 74b at both ends, so that the mechanical strength of the spacer 74 is enhanced.

As shown in FIG. 16, the reinforcing member 75 is composed of a half 82 and three support arms 83 extending radially from the half 82.

Hereinafter, the composite electrode of the vacuum interamplifier according to the fourth embodiment of the present invention will be described. The composite electrode 90 according to the fourth embodiment can be said to be a modification of the composite electrodes 24 and 25 according to the first embodiment. The constituent members equivalent to those of the composite electrodes 24 and 25 will only be described in that the constituent members differ from the constituent members of the composite electrodes 24 and 25. In addition, the same code | symbol is used for the same structural member as the structural member of the composite electrode which concerns on the above-mentioned various embodiment, and the description is abbreviate | omitted. As shown in FIG. 17, the composite electrode 90 is similar to the composite electrodes 24 and 25 according to the first embodiment, and the contact electrode 28 and the first and second coil electrodes 91 and ( 73, the spacer 74, the connection conductor 23, and the reinforcing member 75.

The first coil electrode 91 is 1/3 turn type and is formed to be extremely thicker than the first coil electrode 29 according to the first embodiment, so that the half 92, three radial wafers 93, and three It becomes the division turn part 94.

18 and 19 show a conventional composite electrode having a contact electrode having the same diameter as that of the composite electrode 90 and the contact electrode 28 in accordance with the fourth embodiment, and a coil electrode disposed through the vacuum cap on the contact electrode. The result of comparing the electrode (see USP3946179) with respect to the magnetic flux density of the seed field and the residual magnetic flux at the current zero point is shown.

18 and 19, the vertical axis represents the ratio of the magnetic flux density of the seed field by the conventional composite electrode to the magnetic flux density and the residual magnetic flux of the seed field by the composite electrode 90 according to the fourth embodiment. Where the horizontal axis represents the ratio (%) of the distance from the center of the contact electrode to the radius of the contact electrode. In FIG. 18, the curve IVB shows the magnetic flux density of the seed field and the contact electrode by the composite electrode 90. The relationship between the ratio of the distance at the center of the contact electrode 28 to the radius of (28) is shown, and the curve VB shows the equivalent relationship when using the conventional composite electrode.

As shown in FIG. 17, the curve electrode 90 always exists above curve IVB and curve VB, and the matching electrode 90 supplies a seed field stronger than the conventional composite electrode.

As shown in FIG. 19, the curve IVrB always exists below the curve VrB, and the residual magnetic flux of the seed field by the composite electrode 90 is weaker than the residual magnetic flux of the seed field by the conventional composite electrode. Therefore, according to the vacuum interleaver according to the fourth embodiment, better insulation recovery characteristics can be obtained than in the case of a vacuum interlater having a conventional composite electrode.

In the above-described embodiment, the contact electrode has a thick ash-shaped circular shape, but is not limited thereto. For example, the contact electrode may have a shape in which a contact portion having a concave portion is formed in the center of the disc.

In the above-mentioned embodiment, in the case of the vacuum intermitter for opening / closing a large current, the magnetic flux density of the seed field may be increased by making the thickness of the radial wafer of the first high electrode larger than the width of the radial wafer.

In the above embodiment, the etching of the reinforcing member may be betted by arc heating to reduce the field concentration in these etchings. In the above embodiment, the spacer may be directly bonded to the contact electrode without contacting the one coil electrode.

In the composite electrode according to the second embodiment, a support arm 64 may be provided at the quantum end of the rim 65 of the reinforcing member 56.

Therefore, the vacuum interleaver is aimed at increasing the high voltage-to-current blocking capability, and the mechanical part is applied to the inner ends of the lead rods and the lead rods which are coaxially moved inside and outside the vacuum vessel. And an electrically connected-contact electrode, at least one of which is made of a material having a% conductivity of 40% or less and a material having a higher conductivity than that of the connecting electrode, so as to be mechanically and electrically front bonded to the rear surface of the contact electrode. Thus, a coil electrode is applied to apply a seed field substantially parallel to the arc current flowing through the inter-cap.

As a result, the current path in the contact electrode is shortened, thereby weakening the seed field and decreasing the uniformity of the magnetic flux density.

In addition, the inter-electrode cap can be increased by direct contact with the contact electrode coil electrode.

Claims (16)

A vacuum electrode having electrical insulation and a contact electrode mechanically and electrically connected to an inner end of a lead rod that is spoken to move relative to the same axis from the outside to the inside of the vacuum container. At least one of which is composed of a material having a% conductivity of 40% or less and a material having a higher conductivity than that of the contact electrode, which is mechanically and electrically front-facing to the back surface of the one contact electrode, A vacuum interlater consisting of coil electrodes that apply a seed field in substantially parallel. 2. The vacuum interlater according to claim 1, wherein the vacuum interraptor comprises a radial wafer in which the coil electrode is almost circular in its radial direction at its center and a turn portion in which the coil electrode is substantially arcuated at the outer end of the directional wafer. Rafter. 2. The vacuum interlator according to claim 1, wherein the vacuum interlator is a substantially circular shape of the coil electrode, and includes a plurality of radial warps that extend in the radial direction at the center thereof, and a plurality of substantially the same circumferential directions that are spoken at the outer ends of the radial wafers. And a cap between the tip of the split turn part and the radial wafer joined to the tip. 4. The vacuum interlator according to claim 3, wherein the one-side contact electrode is made of a material without a thread along the whole, and is 75% or less of the circumferential length between the longitudinal wafers joining the lengthwise turns of the divided turns. Vacuum interlater. 5. The vacuum interlator according to claim 4, wherein the length of the dividing turn is about 67% of the length of the circumferential length between the radial wafers to be joined. 4. The vacuum interlator according to claim 3, wherein a concave portion corresponding to each cap is provided on the rear surface side of the contact electrode. 7. The vacuum interlator of claim 6, wherein the length of the fin is at least 20% of the radius of the contact electrode. [4] The vacuum interlator of claim 3, wherein the contact electrode is provided with a thread corresponding to each of the caps. 10. The vacuum interlator of claim 8, wherein the length of the thread is 20% or more of a radius of the contact electrode. The vacuum interlaminator according to claim 1, wherein the one of the contact electrodes is made of a material having a conductivity of 20% or less. The vacuum interlator according to claim 1, wherein the vacuum interlator is made of a material having a% conductivity of 10% or less of the one contact electrode. The vacuum interlaminator according to claim 1, wherein the vacuum interlaminator is composed of a material having a% conductivity of 2% of the one contact electrode. According to claim 1, wherein the vacuum interlater is the general contact electrode

alloy

Alloy Cu-Cr-Mo, an alloy, or a Fe-Ni-Cr alloy, characterized in that the vacuum interlifter. The vacuum interlaminator according to claim 1, wherein the vacuum interlater is provided with a planar contact portion at the center of the contact electrode. 15. The vacuum interlator according to claim 14, wherein the flat contact portion has a convex portion at a central portion thereof. 4. The second coil electrode according to claim 3, wherein the vacuum interleaver is disposed on the first coil electrode behind the other first coil electrode of the first coil electrode and moves with the first coil electrode to apply the seed field. And the second coil electrode is electrically connected to a split turn portion of the first coil electrode at one peripheral portion thereof electrically connected to the lead rod to a central portion thereof.

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