EP2619770B1 - Elektrischer leistungswiderstand - Google Patents

Elektrischer leistungswiderstand Download PDF

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Publication number
EP2619770B1
EP2619770B1 EP20110796917 EP11796917A EP2619770B1 EP 2619770 B1 EP2619770 B1 EP 2619770B1 EP 20110796917 EP20110796917 EP 20110796917 EP 11796917 A EP11796917 A EP 11796917A EP 2619770 B1 EP2619770 B1 EP 2619770B1
Authority
EP
European Patent Office
Prior art keywords
resistor
plates
accordance
power resistor
resistance
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.)
Active
Application number
EP20110796917
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2619770A1 (de
Inventor
Bertram Schott
Otto Hampl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vishay Electronic GmbH
Original Assignee
Vishay Electronic GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vishay Electronic GmbH filed Critical Vishay Electronic GmbH
Priority to PL11796917T priority Critical patent/PL2619770T3/pl
Publication of EP2619770A1 publication Critical patent/EP2619770A1/de
Application granted granted Critical
Publication of EP2619770B1 publication Critical patent/EP2619770B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • H01C1/016—Mounting; Supporting with compensation for resistor expansion or contraction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/001—Mass resistors

Definitions

  • the invention relates to an electrical power resistor which is typically used in electrical generators and frequency converters.
  • a power resistor is used to convert electrical energy into thermal energy in special operating conditions in electrical installations in which the electrical energy present must typically be significantly reduced in periods of a few milliseconds to a few seconds. This is the case, for example, in wind and hydroelectric plants.
  • Such a power resistor may be formed by a stack of a plurality of resistance plates of metal, each resistance plate of the stack having at least one meandering structure formed by a plurality of successive mutually interconnected transverse webs.
  • the individual resistance plates must therefore be used in a stable holder or other fastening device which receives the described repulsion and expansion forces and gives the resistance unit formed the necessary mechanical stability.
  • a holder or other fastening device must prevent the end regions of the respective resistance plate from being torn off and ensure a sufficient dimensional stability of the resistance unit with regard to an attachment of the power resistor to another structure (eg in a control cabinet).
  • the power resistor comprises a stack of at least two resistance plates, which are arranged one above the other along the stacking direction, in particular parallel to each other and spaced from each other.
  • the orientation of each second resistor plate is relative to the orientation the preceding resistance plate of the stack rotated by 90 ° in the respective plane of the plate, with respect to the respective extension direction of the meander-shaped structure (ie longitudinal direction). This means that the repulsion and expansion forces occurring perpendicular to the orientation of the transverse webs of the respective resistance plate from resistance plate to resistance plate are also rotated by 90 ° to each other.
  • the transverse webs and / or provided at the ends of the meandering structure, parallel to the transverse webs Endan gleichstege a respective resistance plate record the repulsion and expansion forces of an adjacent (rotated by 90 °) resistance plate.
  • all resistance plates of the stack are fastened to each other by means of a common fastening device.
  • a fastening device may have a simple and inexpensive construction, since it is mainly necessary to achieve that the longitudinal expansion forces of the one resistance plate are transmitted to the adjacent or adjacent (twisted by 90 °) resistance plate or resistance plates. Due to the inherent stability of the resistance plates in the transverse direction, ie along the direction of extension of the transverse webs of the respective meandering structure, forces in this direction can be absorbed by a resistance plate without requiring special requirements for the fastening device.
  • the resistance plates are quadrangular, with pointed or rounded corners.
  • the resistance plates are rectangular, in particular square, wherein in the case of uneven side lengths, the longer side length does not necessarily define the aforementioned longitudinal direction (which is determined solely by the direction of extension of the meandering structure of the resistance plate).
  • a fastening opening is provided for receiving a respective fastening element.
  • the attachment openings of the various resistance plates are arranged in alignment with each other.
  • common fasteners can be used, which are performed by the aligned mounting holes.
  • the resistance plates of the stack may be fastened to each other via attachment rods which are guided through the attachment openings of the resistance plates.
  • the mounting rods may be threaded rods or screws.
  • said fastening elements are electrically insulated from the resistance plates. This can be done for example by plugged mica tubes.
  • the arrangement of said fastening openings and fastening elements with respect to a rotation of the respective resistance plate is 90 ° rotationally symmetrical. This means that the fixing holes of one resistance plate are aligned with the fixing holes of another resistance plate adjacent thereto even when said one resistance plate is rotated by 90 degrees relative to the other resistance plate.
  • the power resistor can be reconfigured even easier for other applications, since the resistance plates can be combined with each other in a particularly flexible manner, and the resistance plates can be designed as a common part.
  • connection means for electrically contacting the resistance plate.
  • This connection means can be designed, for example, as an opening (for example a hole) or as an inserted, attached and / or welded-on bolt. If several or all resistor plates of the stack are provided with the same connection means, the adaptation of the power resistor to a desired resistance value can be carried out in a particularly flexible way. For example, each resistance plate at the two ends of the meander-shaped structure having a connection means for electrical contacting.
  • At least one of the resistance plates has at least one respective connection means for fixing an insulator.
  • the connecting means may be, for example, openings, screws or bolts.
  • the insulators attached to the respective resistor plate allow arranging and attaching the power resistor to another structure, for example in a control cabinet.
  • a respective resistor plate is provided with said mounting holes, connecting means and connecting means, three groups of different mechanical and / or electrical means are available, which can be easily introduced by means of the same tool (for example, in the case of holes).
  • two successive resistance plates in the stacking direction are separated from one another by respective spacers, wherein the spacers may optionally be designed to be electrically insulating or electrically conductive.
  • the spacers cause a predetermined distance of the preferably plane-parallel arranged resistance plates relative to each other.
  • a respective intermediate space between two adjacent resistance plates is formed in the stacking direction, which can be used in particular for cooling purposes (air cooling or liquid cooling).
  • air cooling or liquid cooling By using separate spacers, the respective spacing between two adjacent resistance plates can be flexibly adjusted depending on the desired application.
  • the spacers may be formed by sleeves, which allow a particularly good air circulation between the resistance plates and thus a good heat transfer to the ambient air.
  • continuous spacers may be provided, for example in the form of webs or plates.
  • electrically insulating materials are ceramics, mica, rubber, silicone or plastic.
  • the resistance plates preferably have a respective Endan gleichsteg (so-called terminal), which is formed wider than the transverse webs of the meandering structure.
  • the already mentioned fastening openings for the fastening device can be provided on the particularly stable end connection webs in order to be able to reliably receive the explained expansion forces of the respective adjacent resistance plate.
  • the said attachment openings can also be provided on the transverse webs.
  • the resistance plates in a respective middle region can have at least one center connection web, which is also wider than the transverse webs.
  • the meander-shaped structure of the respective resistance plate which forms the active region of the electrical resistance, is subdivided into a plurality of segments. These segments may be shaped the same or different, and they may have the same or different electrical resistance.
  • Such a middle connection web also contributes to increasing the mechanical stability in the transverse direction.
  • further attachment openings are preferably provided for receiving a respective fastening element, in addition to the attachment openings on the end connection webs.
  • at least one connection means for electrical contacting is provided at the respective center connection web (eg opening or bolt).
  • the transverse webs of the meander-shaped structure of a respective resistance plate are electrically insulated from one another along the intermediate spaces formed between two adjacent transverse webs, either only in sections or over the full length of the respective intermediate space.
  • unwanted arc ignition can be prevented.
  • the deformation of the individual transverse webs can be so strong that adjacent webs arranged adjacent to one another touch each other or at least briefly contact each other for a short time. This effect can ignite an arc that could damage or destroy the power resistor or associated electrical equipment.
  • a mutual electrical insulation of the transverse webs of this danger is prevented, and conversely, the spaces between two adjacent transverse webs can be made narrow, which contributes to increased stability and a compact design.
  • the mutual electrical insulation of the transverse webs can be accomplished in particular by insulating strips (ie electrically insulating strip-shaped plates) which are inserted into the interspaces between two adjacent transverse webs and in particular consist of ceramic, mica or plastic, for example polybenzimidazole (PBI).
  • insulating strips ie electrically insulating strip-shaped plates
  • PBI polybenzimidazole
  • a granulate or other filler can be pressed into the spaces between two adjacent transverse webs, for example, heated polybenzimidazole.
  • a sufficiently cured liquid insulating material can be used, which by filling, injecting or foaming the spaces between two adjacent transverse webs completely or partially fills, for example, silicone, cement or concrete.
  • a sufficiently hardened liquid insulating material may be used, which covers the transverse webs as a coating, for example in the form of a thin polybenzimidazole film, which forms a protection against moisture in addition to the electrical insulation (corrosion protection).
  • a particularly simple and cost-effective production of the individual resistance plates results when the meander-shaped structure of each resistance plate is formed by mutual incisions, which are preferably offset from one another.
  • the cuts between adjacent transverse webs can be introduced for example by means of a laser beam, high-pressure water jet, a saw or a milling cutter, in particular in the same operation, in which the respective resistance plate is cut out of a larger plate.
  • all the resistive plates of the stack, or all of the resistive plates of the stack, with the exception of a base plate, are made identical to each other, i. as equal parts. This results in a particularly cost-effective production and storage, and the respective power resistance can be configured in a flexible manner.
  • the in Fig. 1 shown power resistor comprises a stack of plane-parallel resistance plates arranged, namely with a base plate forming a first resistance plate 11 (FIG. Fig. 2 ), a second resistance plate 12 (FIG. Fig. 3 ) and a third resistance plate 13 (FIG. Fig. 4 ).
  • the rectangular resistance plates 11, 12, 13 are made of metal, typically made of stainless steel or other suitable alloy, and may differ from the illustration in FIG Fig. 1 to 4 also have rounded corners.
  • the resistance plates 11, 12, 13 are attached to each other and electrically connected to each other, as will be explained below.
  • Each resistance plate 11, 12, 13 has a meander-shaped structure, which is formed by a plurality of successive transverse webs 15.
  • Mutually adjacent transverse webs 15 are mutually separated by a slot-shaped intermediate space 17 and connected to each other by means of a short connecting web 19.
  • the transverse webs 15 extend along a transverse direction Q, while the meander-shaped structure of the respective resistance plate thus formed extends perpendicular to the orientation of the transverse webs 15 and to the transverse direction Q, namely along a longitudinal direction L.
  • the transverse webs 15 extend over the full side length of the respective resistance plate 11, 12, 13.
  • the resistance plates 11, 12, 13 may also comprise a plurality of meander-shaped structures which run next to one another.
  • Each resistance plate 11, 12, 13 has at the two ends of the meandering structure a respective Endan gleichsteg 21, which is formed wider than the transverse webs 15. Further, each resistance plate 11, 12, 13 in a central region has a central connection web 23, which also The center connecting web 23 divides the meander-shaped structure of the respective resistance plate 11, 12, 13 into two active regions 25.
  • the successive stacking direction in the resistance plates 11, 12, 13 relative to the respective direction of extension of the meandering structure rotated by 90 ° to each other.
  • the second resistance plate 12 is rotated 90 degrees relative to the first resistance plate 11 within the plate plane
  • the third resistance plate 13 is again rotated 90 degrees relative to the second resistance plate 12 within the plate plane.
  • the orientation of the transverse webs 15 of two adjacent resistance plates 11 and 12 or 12 and 13 is accordingly rotated by 90 °.
  • Each resistance plate 11, 12, 13 has nine attachment openings 31: Four attachment openings 31 are provided in the region of the corners of the respective resistance plate 11, 12, 13. A respective further attachment opening 31 is provided in a middle region of the end connection webs 21. Finally, the respective center connection web 23 also has three attachment openings 31, namely at the two Ends and in a middle area. This results in a matrix of 3 x 3 mounting holes 31.
  • the respective attachment openings 31 of the three resistance plates 11, 12, 13 are arranged in alignment with one another and serve to receive a common attachment device which comprises a plurality of fastening elements 33 common to the three resistance plates 11, 12, 13.
  • a common attachment device which comprises a plurality of fastening elements 33 common to the three resistance plates 11, 12, 13.
  • only six fasteners 33 are provided, i. three mounting holes 31 of the respective resistance plates 11, 12, 13 remain unused.
  • the fasteners 33 are formed in the embodiment shown here as hexagon screws, which cooperate with hex nuts 35 to hold the stack of resistance plates 11, 12, 13 together.
  • spacers ensure that the resistance plates 11, 12, 13 are arranged at a distance from each other.
  • electrically insulating spacers 37 are provided, for example mica flakes with a passage opening for the respective fastening element 33.
  • electrically conductive spacers 39 eg metal sleeves
  • connection means are provided on an end connection web 21 of the first resistance plate 11 and on an end connection web 21 of the third resistance plate 13, which serve to electrically contact the power resistor with the associated electrical system.
  • the respective connection means comprise a connection opening 41 (FIG. Fig. 2 and 4 ) into which a connecting bolt 43 is used ( Fig. 1 ).
  • a connecting bolt 43 is used ( Fig. 1 ).
  • a cable lug can be attached to the respective connecting bolt 43 (not shown).
  • Such connection means (connection opening 41 with connecting bolt 43) may also be provided on the middle connection web 23 of at least the third resistance plate 13 in order to be able to adapt the resistance of the power resistor shown even more flexibly and to be able to use the power resistor as a voltage divider.
  • connection means for fixing an insulator are further provided in order to attach the power resistor to an associated support structure (eg in a control cabinet) can.
  • These connection means comprise six connection openings 45 (FIG. Fig. 2 ) into which a respective connecting screw 47 is inserted, which is screwed to a respective insulator block 49 ( Fig. 1 ).
  • Fig. 5 shows a detailed view of the power resistor according to Fig. 1 in cross section. It can be seen that the fastening element 33, ie the hexagonal screw, is surrounded by a mica tube 51, which likewise penetrates the fastening openings 31 of the resistance plates 11, 12, 13 and thus electrically insulates the hexagonal screw from the resistance plates 11, 12, 13.
  • the fastening element 33 ie the hexagonal screw
  • the in the Fig. 1 to 5 shown power resistor has a simple 'chen structure and can be produced in a cost effective manner.
  • the resistance plates 11, 12, 13 can be cut from larger plates, wherein at the same time the gaps 17 can be introduced as incisions to form the transverse webs 15 of the respective meander-shaped structure.
  • the attachment openings 31, the connection openings 41 and the connection openings 45 can be designed in a simple manner as bores.
  • any desired ratio of width of the transverse webs 15 to the thickness of the respective resistance plate 11, 12, 13 can be realized, for example the ratio one (ie square cross-section). It is also possible to produce the resistance plates 11, 12, 13 by punching, in which case, however, larger ratios of web width to plate thickness are to be provided.
  • the power resistor can be flexibly adapted to different requirements, for example by changing the number of resistance plates 11, 12, 13 of the stack, or by selectively implementing a series connection or a parallel connection by changing the arrangement of the electrically insulating spacers 37 and the electrically conductive spacers 39 becomes.
  • the power resistor can be used as a voltage divider by the middle connection web 23 of the respective resistance plate 11, 12, 13. If the voltage drop across the power resistor or parts of the power resistor is measured, the power resistor can be used as a current sensor.
  • the resistance value of the power resistor can be easily adjusted by means of an electrically conductive bridge connecting, for example, two transverse webs 15 across a gap 17 (e.g., by clamping or welding).
  • the grid of the 3 x 3 mounting holes 31 of the three resistor plates 11, 12, 13 with respect to a rotation of the respective resistor plate 11, 12, 13 by 90 ° rotationally symmetric As a result, the power resistor can be reconfigured even easier for other applications, since thus several available types of resistance plates can be combined with each other in a particularly flexible manner. In particular, this also makes it possible to use identical parts for adjacent resistance plates of a stack, which reduces the manufacturing and storage costs.
  • a non-rotationally symmetrical arrangement of the mounting holes 31 may be provided to thereby realize directional coding and to ensure that the individual resistance plates 11, 12, 13 can be mounted relative to each other only in a single predetermined orientation. This can thus be ensured in a simple manner that the 90 ° to each other twisted orientation of the respective Extension direction of the meandering structure of adjacent resistance plates 11, 12, 13 is always maintained.
  • intermediate spaces 17 between adjacent transverse webs 15 can also be completely or partially filled with an electrically insulating material.
  • This filling material can serve as a spacer between adjacent transverse webs 15 and reliably prevent unwanted ignition of arcs that could arise if adjacent transverse webs 15 are too close due to magnetic interaction, thermal effects and / or external vibrations.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Resistors (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
EP20110796917 2010-12-03 2011-12-01 Elektrischer leistungswiderstand Active EP2619770B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11796917T PL2619770T3 (pl) 2010-12-03 2011-12-01 Elektryczny rezystor mocy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010053389A DE102010053389A1 (de) 2010-12-03 2010-12-03 Elektrischer Leistungswiderstand
PCT/EP2011/006050 WO2012072262A1 (de) 2010-12-03 2011-12-01 Elektrischer leistungswiderstand

Publications (2)

Publication Number Publication Date
EP2619770A1 EP2619770A1 (de) 2013-07-31
EP2619770B1 true EP2619770B1 (de) 2014-08-06

Family

ID=45349446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110796917 Active EP2619770B1 (de) 2010-12-03 2011-12-01 Elektrischer leistungswiderstand

Country Status (12)

Country Link
US (1) US9117575B2 (ja)
EP (1) EP2619770B1 (ja)
JP (1) JP5887356B2 (ja)
KR (1) KR101878422B1 (ja)
CN (1) CN103262181B (ja)
DE (1) DE102010053389A1 (ja)
DK (1) DK2619770T3 (ja)
ES (1) ES2502742T3 (ja)
IL (1) IL226661A (ja)
PL (1) PL2619770T3 (ja)
TW (1) TWI529752B (ja)
WO (1) WO2012072262A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016107931A1 (de) * 2016-04-28 2017-11-02 Epcos Ag Elektronisches Bauelement zur Einschaltstrombegrenzung und Verwendung eines elektronischen Bauelements
CN107393667A (zh) * 2017-05-27 2017-11-24 广东福德电子有限公司 一种结构稳定的电阻器
DE102017113600A1 (de) * 2017-06-20 2018-12-20 Vishay Electronic Gmbh Leistungswiderstand
WO2019175953A1 (ja) * 2018-03-13 2019-09-19 株式会社辰巳菱機 負荷試験装置
KR102134601B1 (ko) * 2018-08-17 2020-07-16 엘에스일렉트릭(주) 모듈형 한류 저항기
CN110136902B (zh) * 2019-05-08 2024-08-02 凌海科诚电气有限责任公司 一种高压无感电阻器及其制作方法
ES2905143T3 (es) * 2019-09-20 2022-04-07 Zahnradfabrik Friedrichshafen Tubo de paso eléctricamente aislado
CN218788734U (zh) 2019-12-18 2023-04-04 米沃奇电动工具公司 动力工具及用于动力工具的制动系统

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Also Published As

Publication number Publication date
JP2014504001A (ja) 2014-02-13
US9117575B2 (en) 2015-08-25
IL226661A (en) 2016-12-29
WO2012072262A1 (de) 2012-06-07
EP2619770A1 (de) 2013-07-31
TW201239913A (en) 2012-10-01
JP5887356B2 (ja) 2016-03-16
ES2502742T3 (es) 2014-10-06
PL2619770T3 (pl) 2015-01-30
KR101878422B1 (ko) 2018-07-13
KR20130128429A (ko) 2013-11-26
DE102010053389A1 (de) 2012-06-06
US20130328660A1 (en) 2013-12-12
CN103262181A (zh) 2013-08-21
CN103262181B (zh) 2016-01-27
TWI529752B (zh) 2016-04-11
DK2619770T3 (da) 2014-09-22

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