WO2013134939A1 - Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance - Google Patents

Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance Download PDF

Info

Publication number
WO2013134939A1
WO2013134939A1 PCT/CN2012/072325 CN2012072325W WO2013134939A1 WO 2013134939 A1 WO2013134939 A1 WO 2013134939A1 CN 2012072325 W CN2012072325 W CN 2012072325W WO 2013134939 A1 WO2013134939 A1 WO 2013134939A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
clad aluminum
busbar
copper clad
aluminum
Prior art date
Application number
PCT/CN2012/072325
Other languages
English (en)
Inventor
JianFeng SHENG
Chun Li
Jihuan TIAN
Huigang Sun
Original Assignee
Abb Technology Ltd.
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 Abb Technology Ltd. filed Critical Abb Technology Ltd.
Priority to PCT/CN2012/072325 priority Critical patent/WO2013134939A1/fr
Publication of WO2013134939A1 publication Critical patent/WO2013134939A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/02—Single bars, rods, wires, or strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium

Definitions

  • the invention relates to the technical field of electric power products, particularly relates to a busbar used in power products subjecting to high current such as high voltage switchgears, drives, transformer, and rectifiers, etc.
  • a busbar is a strip of copper or aluminum that conducts electricity within a switchboard, distribution board, substation or other electrical apparatus.
  • the medium voltage power products like switchgear mainly use copper busbar due to the high electric conductivity and good thermal conductivity. Whereas, the price of copper is being increasing in recent years, to find an appropriate substitution for copper busbar is, therefore, pretty necessary.
  • WO2006114022A1 disclosed a processing method of a copper-clad aluminum busbar.
  • the copper-clad aluminum bus-bar combines the two defined conductive metals, copper and aluminum, into one conductor, thereby provides a lower cost and lighter weight conductor than fine copper conductor under the situation of guaranteeing its reliability. It is very considerable in saving of the material and labor cost. Its cost is lowest, saving 30% to 50%, and it is considered as an environmental conservation product because of saving a mass of copper resource.
  • the density of the fine copper bus-bar is 8.9g/cm 3 , which is 3.47 times higher than that of the copper-clad aluminum bus-bar, which is 3.63g/cm 3 .
  • the copper-clad aluminum bus-bar is 3.47 times longer than the fine copper bus-bar with same weight and width.
  • WO2009064060A1 disclosed a method of manufacturing a copper clad aluminum busbar, comprising: (a) processing an aluminum bar into a rod pre-treating the aluminum bar; (b) inserting the aluminum bar into a copper tube to prepare a composite bar having a predetermined structure, and drawing the composite bar such that the aluminum bar and the copper tube of the composite bar are brought into close contact with each other at an interface thereof; (c) pre-treating the composite bar in order to prevent a lubricant or machining oil from infiltrating between the aluminum layer and the copper layer of the composite bar; (d) processing a leading end of the composite bar at a predetermined angle, making the copper layer longer than the aluminum layer by a predetermined length, and then ejecting the copper layer using the ejecting unit; (e) drawing the ejected composite bar using the heat drawing unit such that the aluminum layer and the copper layer of the composite bar are brought into tight contact with each other at the interface thereof; and (f) processing the heated and drawn composite bar into
  • the above mentioned copper clad aluminum busbar comprises a copper layer 11 and an aluminum base 12. It has been applied in low voltage power products. However, this kind of copper clad aluminum busbar has not been used in high voltage power products due to the lower current-carrying capacity compared with copper busbar in identical dimension. If this kind copper clad aluminum busbar is used in high voltage switchgears, its dimension has to be enlarged compared with prior copper clad aluminum busbar to get the same performance. This makes the substitution using such kind of copper clad aluminum less feasible.
  • the intermediate layer between the copper outer layer and the aluminum base is always broken, because the layer consists of brittle Cu-AI compound can be easily broken during deformation process.
  • the poor adhesion between copper outer layer and the aluminum base leads to the delamination after machining such as bending, cutting, drilling, or chamfering.
  • the present invention provides a copper clad aluminum busbar with high current carrying capacity and good tenacity for machining
  • a copper clad aluminum busbar with high current carrying capacity comprises an aluminum base and a copper outer layer.
  • the copper outer layer comprises two flat copper layers and two copper round ends. And the copper round end is thicker than the flat copper layers.
  • the copper round end is a semi-cylinder. It can also be other shape. The important issue is keeping the thickness of copper at the round ends thicker than the copper layer at the flat sides. Thus, the copper at the two round ends reduces the AC resistance of dumb-bell copper clad aluminum busbar.
  • the copper is 15% -40% by volume of the copper clad aluminum busbar.
  • a copper clad aluminum busbar is provided. It comprises an aluminum base and a copper outer layer and an intermediate layer between the copper outer layer and the aluminum base.
  • the intermediate layer can be zinc or nickel.
  • the thickness of the intermediate layer is 5 ⁇ - 200 ⁇ .
  • the copper clad aluminum busbar comprises an aluminum base and a copper outer layer and an intermediate layer between the copper outer layer and the aluminum base.
  • the copper outer layer comprises two thin layers at both flat sides and two semi-cylinders at both side ends.
  • the busbar is plated with metals like copper, silver or nickel to protect the end surfaces from corrosion.
  • the above mentioned copper clad aluminum busbar can be used for rectifiers, circuit breakers, instrument transformers, power transformers, or switchgears.
  • Figure 1A shows the copper busbar
  • Figure 1 B shows the prior copper-clad aluminum busbar
  • Figure 2 is the dumb-bell copper-clad aluminum busbar according to one preferred embodiment of the present invention.
  • Figure 3 show the simulation results of the current density distributions along the horizontal central axis of different busbars; wherein the solid line shows the simulation results of the current density distributions in the copper busbar; the dashed line CCA1 shows the simulation results of the current density distributions in the prior copper clad aluminum busbar; and the dash-dotted line CCA2 shows the simulation results of the current density distributions in the dumb-bell copper clad aluminum busbar.
  • Figure 4 is the sandwich copper-clad aluminum busbar according to one preferred embodiment of the present invention.
  • Figure 5A is the phase diagram of All-Zn;
  • Fig. 5B is the phase diagram of Cu-Zn;
  • Figure 6 is the dumb-bell sandwich copper-clad aluminum busbar according to one preferred embodiment of the present invention.
  • a copper clad aluminum busbar which has a high current-carrying capacity is provided.
  • the high current-carrying capacity problem is solved with a called "dumb-bell" copper clad aluminum.
  • the dumb-bell copper clad aluminum busbar comprises an aluminum base 22 and a copper outer layer 21.
  • the copper outer layer 21 comprises two thin flat layers 211 at both flat sides and two semi-cylinders 212 at both round ends.
  • the outer dimension of the dumb-bell copper clad aluminum busbar is identical to previous one, for example, 10x80mm or 10x100mm busbars, whereas the thickness of the copper layer of the dumb-bell copper clad aluminum busbar is not uniform any more.
  • 10x80mm dumb-bell copper clad aluminum busbar as an example, the shape of previous copper layer at the round corner is changed from 1 mm-thick layer to semi-cylinder with the diameter of 5mm, the copper content, therefore, can increase up to around 28% in contrast with 20% of the traditional copper clad aluminum busbar as shown in Fig. 2.
  • the thickness of the flat copper layers is 5% -20% of that of the aluminum base.
  • Table 1 AC resistance values and the ratio to DC resistance of copper and different copper clad aluminum busbars
  • the dashed line CCA1 shows the simulation results of the current density distributions in the prior copper clad aluminum busbar; and the dash-dotted line CCA2 shows the simulation results of the current density distributions in the dumb-bell copper clad aluminum busbar.
  • the dumb-bell copper clad aluminum busbar enlarges the area where high current density distributes. Consequently, the resistance of dumb-bell copper clad aluminum busbar is to be lower than that of prior one, which has been demonstrated by simulation results in Table 1 .
  • a copper clad aluminum busbar with good tenacity for machining such as bending, cutting, drilling, or chamfering is provided.
  • the good tenacity is provided by a "sandwich" copper clad aluminum as shown in Fig. 4.
  • Fig. 4 is the sandwich copper-clad aluminum busbar according to one preferred embodiment of the present invention an intermediate layer 23 is introduced between the copper outer layer and the aluminum base in the sandwich copper clad aluminum.
  • the introduction of the intermediate layer 23 can avoid the formation of the brittle intermetallic CuAI2 layer.
  • the intermediate layer 23 can be either zinc or nickel. Taking zinc as an example, the zinc layer will form only solution with aluminum and will mainly form a-brass with copper because the layer of Zn-AI solution keeps the crystal structures of both zinc and aluminum and the well-known a-brass has good machining performance.
  • the soft intermediate layer will keep continuous during deformation by rolling process. The delamination, therefore, can be avoided even with the identical machining parameters to copper busbar.
  • the thickness of the intermediate layer 23 is 5 ⁇ - 200 ⁇ .
  • dumb-bell copper clad aluminum busbar and the sandwich copper clad aluminum busbar can solve the problems of poor current-carrying capacity and poor machining performance respectively.
  • a sandwiched dumb-bell copper clad aluminum busbar is provided to solve both problems of poor current-carrying capacity and poor machining performance.
  • the sandwiched dumb-bell copper clad aluminum busbar comprises a semi-cylinder shaped copper at the two round corners and two copper layers at both flat sides.
  • the sandwiched dumb-bell copper clad aluminum busbar further comprises a zinc layer between copper and aluminum with an intermediate layer of either zinc or nickel, which presents the advantages of both higher conductivity and better machining performance.
  • copper clad aluminum busbar To protect the end surfaces of copper clad aluminum busbar from corrosion, it can be plated with metals like copper, silver or nickel, which depends on the actual circumstances.
  • dumb-bell copper clad aluminum the copper tube with two extra-thick edges is to be first produced, and then the copper tube is to be put around the aluminum bar, or to be used for casting molten aluminum.
  • the intermediate layer can be first plated onto the surfaces (either the inner surface of the copper tube or the outer surface of the aluminum bar), then the sandwich copper clad aluminum busbar will be fabricated using existing methods (mechanical bonding and ingot-casting).
  • the plating protection for the copper clad aluminum busbar is proposed.
  • the plating materials are Ag, Ni, and Cu.
  • the plating has passed a series of test namely visual check, thermal shock, thermal aging, and 168-hour salt spray test.
  • the protection place is the end surfaces after cutting and chamfering.
  • the copper clad aluminum of present invention has the following advantages:
  • the copper clad aluminum of present invention can be used for at least one selected from the group comprising dry-type transformers, particularly vacuum cast dry distribution transformers, which within the resin structure contain electrical conductors; polemount transformers for outdoor insulation; instrument transformers for medium voltage; high voltage insulation for indoor use, like breakers or switchgear application; high voltage and medium voltage bushings; as long-rod, composite and cap-type insulators, and also for base insulators in the medium voltage sector, in the production of insulators associated with outdoor power switches, measuring transducers, leadthroughs, and overvoltage protectors, in switchgear constructions, in power switches, and electrical machines, as coating materials for transistors and other semiconductor elements and/or to impregnate electrical components.
  • dry-type transformers particularly vacuum cast dry distribution transformers, which within the resin structure contain electrical conductors
  • polemount transformers for outdoor insulation
  • instrument transformers for medium voltage
  • high voltage insulation for indoor use, like breakers or switchgear application
  • high voltage and medium voltage bushings as long-rod,

Landscapes

  • Non-Insulated Conductors (AREA)

Abstract

La présente invention concerne une barre omnibus en aluminium recouverte de cuivre comportant une base en aluminium (22) et une couche extérieure de cuivre (21). La couche extérieure de cuivre (21) comporte deux couches de cuivres plates (211) et deux couches d'extrémité de cuivre arrondies (212); et l'extrémité de cuivre arrondie (212) peut par exemple être un demi-cylindre. La barre omnibus en aluminium recouverte de cuivre peut également comporter une couche intermédiaire entre la couche extérieure de cuivre (21) et la base en aluminium (22). La couche intermédiaire (23) peut être du zinc ou du nickel et l'épaisseur de la couche intermédiaire (23) est comprise entre 5μm et 200 μm. La barre omnibus en aluminium recouverte de cuivre peut être utilisée pour transformateurs, disjoncteurs, redresseurs ou appareillages de commutation. L'aluminium recouvert de cuivre selon la présente invention peut passer un test de hausse de température d'appareillage de commutation de haute tension avec la barre omnibus en aluminium recouverte de cuivre en forme d'haltère, alors que l'aluminium recouvert de cuivre de l'art antérieur ne peut pas passer le test. L'invention améliore l'adhérence entre la couche extérieure de cuivre et la base en aluminium pour une meilleure performance d'usinage. L'économie de coûts pour la substitution de barre omnibus de cuivre est importante.
PCT/CN2012/072325 2012-03-14 2012-03-14 Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance WO2013134939A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/072325 WO2013134939A1 (fr) 2012-03-14 2012-03-14 Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/072325 WO2013134939A1 (fr) 2012-03-14 2012-03-14 Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance

Publications (1)

Publication Number Publication Date
WO2013134939A1 true WO2013134939A1 (fr) 2013-09-19

Family

ID=49160233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/072325 WO2013134939A1 (fr) 2012-03-14 2012-03-14 Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance

Country Status (1)

Country Link
WO (1) WO2013134939A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105679460A (zh) * 2016-04-01 2016-06-15 安徽鑫旭新材料股份有限公司 一种铜铝复合电工母线排及其生产方法
CN108878057A (zh) * 2018-06-12 2018-11-23 辽宁工业大学 含锌高韧性复合层铜包铝复合材料的制备方法
KR20190091502A (ko) * 2016-12-07 2019-08-06 옌 타이 피센드 바이메탈 코., 엘티디. 고 결합강도의 구리-알루미늄 복합 전도성 재료 및 그 제조 방법
US11145434B2 (en) 2019-05-08 2021-10-12 Erico International Corporation Low voltage power conductor and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000113730A (ja) * 1998-10-05 2000-04-21 Totoku Electric Co Ltd 複合軽量化リボン線、絶縁複合軽量化リボン線およびこれらの製造方法
CN2935390Y (zh) * 2006-07-20 2007-08-15 骆建华 母线槽导电铝排
CN201160012Y (zh) * 2008-01-25 2008-12-03 鲁春雷 一种铜覆铝母排
CN101447258A (zh) * 2008-12-17 2009-06-03 上海工程技术大学 一种铜包铝复合板带的制造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000113730A (ja) * 1998-10-05 2000-04-21 Totoku Electric Co Ltd 複合軽量化リボン線、絶縁複合軽量化リボン線およびこれらの製造方法
CN2935390Y (zh) * 2006-07-20 2007-08-15 骆建华 母线槽导电铝排
CN201160012Y (zh) * 2008-01-25 2008-12-03 鲁春雷 一种铜覆铝母排
CN101447258A (zh) * 2008-12-17 2009-06-03 上海工程技术大学 一种铜包铝复合板带的制造方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105679460A (zh) * 2016-04-01 2016-06-15 安徽鑫旭新材料股份有限公司 一种铜铝复合电工母线排及其生产方法
KR20190091502A (ko) * 2016-12-07 2019-08-06 옌 타이 피센드 바이메탈 코., 엘티디. 고 결합강도의 구리-알루미늄 복합 전도성 재료 및 그 제조 방법
KR102278579B1 (ko) * 2016-12-07 2021-07-16 옌 타이 피센드 바이메탈 코., 엘티디. 고 결합강도의 구리-알루미늄 복합 전도성 재료 및 그 제조 방법
CN108878057A (zh) * 2018-06-12 2018-11-23 辽宁工业大学 含锌高韧性复合层铜包铝复合材料的制备方法
US11145434B2 (en) 2019-05-08 2021-10-12 Erico International Corporation Low voltage power conductor and system

Similar Documents

Publication Publication Date Title
WO2013134939A1 (fr) Barre omnibus en aluminium recouverte de cuivre à haute conductivité et haute résistance
CN103117114B (zh) 一种铜与铝合金配合使用方法
CN1930640A (zh) 铜包铝母线的制作方法
CN101226819A (zh) 用铜铝复合材料导线绕制铁心变压器绕组的方法及其绕组
CN201478093U (zh) 多层膜铝箔变压器
CN102364581A (zh) 一种铝合金电缆
CN201160012Y (zh) 一种铜覆铝母排
CN103680685B (zh) 干式全屏蔽绝缘管状母线
KR100603021B1 (ko) 은 코팅층이 첨가된 동-알루미늄 클래드 부스바 및 그제조방법
CN202839029U (zh) 一种多金属线芯平行漆包线
CN201112083Y (zh) 铁心变压器绕组
CN110706841B (zh) 一种高强度高导电率的电工用铝合金导线及其制造方法
CN107749601A (zh) 一种树脂浇注终端母线
CN201359860Y (zh) 纸包铜银合金组合导线
CN203746561U (zh) 一种铝合金导体屏蔽电缆
CN201359867Y (zh) 纸包铜银合金扁线
CN204463863U (zh) 一种舰船用中频橡套软电缆
CN203260343U (zh) 大型高压电机绝缘漆包铜包铝线
CN1979696A (zh) 一种铜包铝纳米云母漆包线
CN217008808U (zh) 一种线材剥皮退皮机构装置
CN207909512U (zh) 一种抗干扰能力强的铜包铝线
CN204066855U (zh) 变频电机专用抗拉电缆
CN103413592B (zh) 一种大载流量低温升的矩形导体的制作方法
CN2914259Y (zh) 工业配电线路用异型线
KR20230026707A (ko) 산화피막 절연 도체 및 이를 포함하는 케이블

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12870991

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12870991

Country of ref document: EP

Kind code of ref document: A1