EP1166308A1 - Selbsterholende strombegrenzungseinrichtung mit flüssigmetall - Google Patents
Selbsterholende strombegrenzungseinrichtung mit flüssigmetallInfo
- Publication number
- EP1166308A1 EP1166308A1 EP00916931A EP00916931A EP1166308A1 EP 1166308 A1 EP1166308 A1 EP 1166308A1 EP 00916931 A EP00916931 A EP 00916931A EP 00916931 A EP00916931 A EP 00916931A EP 1166308 A1 EP1166308 A1 EP 1166308A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current limiting
- limiting device
- liquid metal
- self
- connecting channels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling
Definitions
- the invention relates to a self-recovering current limiting device with liquid metal, containing electrodes made of solid metal for connection to a circuit to be protected and several compressor rooms partially filled with liquid metal and lying one behind the other between the electrodes, which are formed by pressure-resistant insulating bodies and insulating partition walls held by them with connecting channels.
- a self-recovering current limiting device which contains two electrodes made of solid metal, which are separated by first insulating bodies designed as pressure-resistant insulating housings. Inside the insulating housing, insulated intermediate walls and second insulating bodies arranged between them, which are designed as ring-shaped sealing disks, form compressor chambers which are partially filled with liquid metal and which are connected to one another via eccentrically arranged connecting channels of the intermediate walls filled with liquid metal. In normal operation, there is therefore a continuous internal conductive connection between the electrodes via the liquid metal. In the event of a current limitation, the liquid metal is displaced from the connecting channels due to the high current density. So that is electrical
- a current limiting device with only one compressor chamber is described and vacuum, protective gas or an insulating liquid is mentioned as the medium above the liquid level.
- a known current limiting device according to document SU 1 094 088 A is equipped with partition walls in which a plurality of connecting channels are formed concentrically around the longitudinal axis, and with copper partition walls arranged between the partition walls and leading to the outside for cooling the liquid metal.
- This current limiting device permits use positions for rotations of up to 360 ° around the horizontal longitudinal axis and inclinations of up to 50 ° with respect to the horizontal, which is only possible in connection with the disadvantageously partition walls, which, because of these partition walls, make the compressor rooms complex must be filled individually with liquid metal.
- the invention is therefore based on the object of specifying a current limiting device which, in an easy-to-use and safely reproducible manner, is based on a desired current limiting behavior, i.e. in particular with regard to the response current, is to be at least approximately optimally adapted.
- the liquid metal adapts due to its fluid properties to the internal spatial geometry of the current limiting device that is then created. It has been found that the size of the response current increases with the same conditions as the level of the liquid metal above the connecting channels increases.
- a special development of the invention consists in that in one of the positions of use, all the connecting channels are arranged above the liquid level. By pivoting into this position of use from another position of use or vice versa, the current limiting device additionally acts as an on / off switch.
- the current limiting device is provided with display means associated with its use positions, which are unambiguous Provide information about the current limitation characteristics of the respective usage situation.
- GalnSn alloys as the liquid metal to be used are easy to handle due to their physiological harmlessness.
- An alloy of 660 parts by weight gallium, 205 parts by weight indium and 135 parts by weight tin is liquid at normal pressure from 10 ° C to 2000 ° C and has sufficient electrical conductivity.
- Figure 1 a current limiting device according to the invention in longitudinal section
- Figure 2 the current limiting device in different positions of use, each in cross section A-A of FIG. 1st
- the current limiting device 10 contains on both sides an electrode 1 made of solid metal, preferably copper, which is cuboid with a square cross section and merges into an outer connecting conductor 2. Between the electrodes 1 there are several compressor spaces 4, which are formed by a corresponding number of annular sealing disks 11 and insulating partition walls 12. The electrodes 1, the sealing disks 11 and the intermediate walls 12 are held by a molded housing 5, whereby known means are provided for sealing the compression spaces 4 and for non-positively connecting the elements 1, 11 and 12 stored in the molded housing 5, but for reasons of Visibility are not shown.
- the means for sealing can be, for example, sealing rings between the sealing disks 11 and the intermediate walls 12 or electrodes 1.
- the means for non-positive connection are, for example, continuous tensioning screws along the two lines 3.
- the two outer compression spaces 4 are laterally delimited by one of the electrodes 1 and by an intermediate wall 12.
- the inner compression spaces 4 are laterally delimited by two intermediate walls 12.
- the molded housing 5 consisting of two identical half-shells 51 and the sealing disks 11 are pressure-resistant first and second insulating bodies. All the compressor rooms 4 are partially filled with a liquid metal 7, for example a GalnSn alloy. In this example, there is a vacuum or a protective gas above the liquid level 71.
- the intermediate walls 12 are provided with connecting channels 81 to 84. If at least one of the connecting channels 81 to 84 is also filled with liquid metal 7, there is a continuous electrically conductive connection between the electrodes 1.
- the partitions 12 are each provided with four connecting channels 81 to 84.
- the horizontal longitudinal axis 6 of the current limiting device 10 extends perpendicular to the intermediate walls 12.
- the connecting channels 81, 82, 83 and 84 are not all arranged concentrically with respect to the longitudinal axis 6.
- the current limiting device 10 has four different positions of use, which result one after the other by rotating the current limiting device 10 by 90 ° about its longitudinal axis 6.
- the connecting channels 81, 82 or 83 or 84 detected by the liquid metal 7 each have different immersion depths t1 or t2 or t3 with respect to the liquid level 71 - in descending order.
- the two connecting channels 81 and 82 are captured by the liquid metal 7.
- a connecting channel namely the connecting channel 83 or the connecting channel 84
- none of the connecting channels 81 to 84 is metal 7 detected. Due to the different immersion depths t1 to t3 and the different number of connecting channels 81 to 84 detected by the liquid metal 7 in the four positions of use shown, four different characteristics are achieved for one and the same current limiting device 10. For example, the current limiting device 10 assumes a current limiting characteristic in the individual operating positions, which is shown in FIG. 2a
- 2d is suitable for a constantly interrupted OFF position due to the lack of a connecting channel filled with liquid metal 7.
- connection channels with different channel diameters allows the current limiting characteristics to be further modified in the various use situations. Markings on the outer walls of the molded housing 5 can be used to clearly assign a current limiting characteristic to the respective position of use according to FIGS. 2a to 2c and the OFF position to the position of use according to FIG. 2d.
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Fuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914147A DE19914147A1 (de) | 1999-03-29 | 1999-03-29 | Selbsterholende Strombegrenzungseinrichtung mit Flüssigmetall |
DE19914147 | 1999-03-29 | ||
PCT/EP2000/002202 WO2000058987A1 (de) | 1999-03-29 | 2000-03-11 | Selbsterholende strombegrenzungseinrichtung mit flüssigmetall |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1166308A1 true EP1166308A1 (de) | 2002-01-02 |
EP1166308B1 EP1166308B1 (de) | 2002-12-18 |
Family
ID=7902780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00916931A Expired - Lifetime EP1166308B1 (de) | 1999-03-29 | 2000-03-11 | Selbsterholende strombegrenzungseinrichtung mit flüssigmetall |
Country Status (5)
Country | Link |
---|---|
US (1) | US6525642B1 (de) |
EP (1) | EP1166308B1 (de) |
JP (1) | JP2002540580A (de) |
DE (2) | DE19914147A1 (de) |
WO (1) | WO2000058987A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19903837B4 (de) * | 1999-02-01 | 2004-02-19 | Moeller Gmbh | Selbsterholende Strombegrenzungseinrichtung mit Flüssigmetall |
DE19918451A1 (de) * | 1999-04-23 | 2000-10-26 | Moeller Gmbh | Selbstholende Strombegrenzungseinrichtung mit Flüssigmetall |
DE10139565B4 (de) * | 2001-08-10 | 2004-07-29 | Moeller Gmbh | Strombegrenzungseinrichtung mit Flüssigmetall |
JP3955956B2 (ja) * | 2004-08-30 | 2007-08-08 | 国立大学法人九州工業大学 | 誘電泳動力を用いた自己回復性限流ヒューズ |
WO2009055763A2 (en) * | 2007-10-26 | 2009-04-30 | Kowalik Daniel P | Micro-fluidic bubble fuse |
JP5050265B2 (ja) * | 2007-11-09 | 2012-10-17 | 国立大学法人九州工業大学 | 自己回復性限流ヒューズ |
US8953314B1 (en) * | 2010-08-09 | 2015-02-10 | Georgia Tech Research Corporation | Passive heat sink for dynamic thermal management of hot spots |
CN109119308B (zh) * | 2018-10-30 | 2024-02-20 | 深圳市金合联技术股份有限公司 | 液态金属结构自复熔断器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE373009C (de) | 1923-04-06 | Edmund Schroeder | Schalter, bei welchem die Kontaktgebung durch Quecksilber oder andere fluessige Leiter erfolgt | |
DE2652506A1 (de) * | 1976-11-18 | 1978-05-24 | Gec Elliott Automation Ltd | Elektrische hochstromvorrichtungen |
SU922911A1 (ru) * | 1980-05-05 | 1982-04-23 | Kb Polt Inst Kujbysheva | Токоограничитель 1 |
SU1094088A1 (ru) | 1983-02-18 | 1984-05-23 | Куйбышевский ордена Трудового Красного Знамени политехнический институт им.В.В.Куйбышева | Токоограничитель |
DD282778A5 (de) | 1989-04-26 | 1990-09-19 | Karl Marx Stadt Tech Hochschul | Stromgesteuerte abschaltvorrichtung |
JP3115966B2 (ja) * | 1993-09-20 | 2000-12-11 | 富士通株式会社 | コネクタ |
US6313417B1 (en) * | 2000-10-04 | 2001-11-06 | Honeywell International Inc. | Conducting liquid tilt switch using weighted ball |
-
1999
- 1999-03-29 DE DE19914147A patent/DE19914147A1/de not_active Withdrawn
-
2000
- 2000-03-11 US US09/937,578 patent/US6525642B1/en not_active Expired - Fee Related
- 2000-03-11 WO PCT/EP2000/002202 patent/WO2000058987A1/de active IP Right Grant
- 2000-03-11 DE DE50000973T patent/DE50000973D1/de not_active Expired - Fee Related
- 2000-03-11 EP EP00916931A patent/EP1166308B1/de not_active Expired - Lifetime
- 2000-03-11 JP JP2000608398A patent/JP2002540580A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0058987A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2002540580A (ja) | 2002-11-26 |
US6525642B1 (en) | 2003-02-25 |
EP1166308B1 (de) | 2002-12-18 |
DE19914147A1 (de) | 2000-10-05 |
WO2000058987A1 (de) | 2000-10-05 |
DE50000973D1 (de) | 2003-01-30 |
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