EP4133122A1 - Convertisseur de puissance à barres omnibus en aluminium anodisées en couleur et procédé de fabrication d'un tel convertisseur de puissance - Google Patents

Convertisseur de puissance à barres omnibus en aluminium anodisées en couleur et procédé de fabrication d'un tel convertisseur de puissance

Info

Publication number
EP4133122A1
EP4133122A1 EP21728455.3A EP21728455A EP4133122A1 EP 4133122 A1 EP4133122 A1 EP 4133122A1 EP 21728455 A EP21728455 A EP 21728455A EP 4133122 A1 EP4133122 A1 EP 4133122A1
Authority
EP
European Patent Office
Prior art keywords
aluminum
power converter
color
busbars
busbar
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.)
Pending
Application number
EP21728455.3A
Other languages
German (de)
English (en)
Inventor
Philipp Kneißl
Stephan Neugebauer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP4133122A1 publication Critical patent/EP4133122A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/022—Anodisation on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/243—Chemical after-treatment using organic dyestuffs

Definitions

  • the invention relates to a method for producing a power converter with at least two aluminum busbars. Furthermore, the invention relates to an aluminum busbar for such a power converter. The invention further relates to such a power converter with at least two such aluminum busbars.
  • busbars In power converters, current has to be transmitted between the individual components at many points. Above a certain current level, circuit boards and cables are no longer suitable for this task and busbars, often referred to as discrete busbars, are used. Nickel-plated copper bars are often used to transmit electricity, in particular to protect against sulfur compounds. These have a high conductivity and have proven themselves in practice.
  • aluminum busbars are used, which are cheaper than copper busbars.
  • these require a surface coating in order to suppress the build-up of aluminum oxide at the contact point and thus achieve a reproducibly low contact resistance at the contact points.
  • This galvanic coating is more complex than with copper rails.
  • the color of the treated aluminum splints corresponds to the coating material and is usually silver.
  • Cold gas spray coatings also known as cold gas coatings
  • cold gas coatings have recently become known for reducing contact resistance at the contact point. These enable local treatment of the material and usually do not require a multi-layer structure as with galvanic solutions.
  • the rails previously for current-carrying purposes were used, could previously be used with high current densities only surface with galvanic nickel-plated surface. Alternatively, the surface was often just cleaned and greased.
  • Some spray processes, but especially the cold spray process penetrate the oxide layer of aluminum and therefore enable the use of otherwise untreated aluminum with high current densities or limited cooling.
  • the object of the invention is to improve a manufacturing process for a power converter and a power converter with aluminum busbars.
  • This object is achieved by a method for producing an aluminum busbar for a power converter, in a first step the surface or at least parts of the surface of the aluminum busbar being given one or more predeterminable colors by means of an anodizing treatment, in a second step at least on a first part a cold gas coating is applied to the surface to create a contact surface. Furthermore, the object is achieved by an aluminum busbar for a power converter which has been produced by such a manufacturing method, wherein the surface of the aluminum busbar has a predetermined color which has been applied to the surface by the anodizing treatment. The object is further achieved by a power converter with at least one such aluminum busbar, the color of at least two of the busbars of the power converter differing. The object is also achieved by a method with the features of claim 1 and by a power converter with the features of claim 3 .
  • the invention is based, among other things, on the knowledge that the combination of anodizing and subsequent A particularly advantageous aluminum busbar for power converters can be produced using cold gas coating. It has been shown that a cold gas coating can not only be carried out on an untreated aluminum busbar, but also that an anodised aluminum busbar can be processed using cold gas coating.
  • Anodizing is associated with a build-up of the aluminum oxide layer, which is a poor conductor of electricity. Anodizing is therefore normally unsuitable for busbars.
  • the anodised aluminum rails can only be used as busbars with cold gas coating, which can also be used on anodised aluminum rails.
  • the cold gas coating breaks through the anodized layer at the contact points and thus creates good contact resistance on the otherwise poorly conductive rail surface. The surface therefore does not have to be completely treated with the cold gas coating. It is sufficient to only process or treat the contact points accordingly.
  • the anodized surface of the aluminum busbar not only protects against corrosion better than a naturally formed oxide layer, it can also be used for optical purposes and can be colored as desired. In other words, a predetermined color can be given to the aluminum busbar by an anodizing treatment before the cold gas spraying treatment.
  • Colored busbars offer a multitude of advantages. Different rails can be color coded to reliably prevent mix-ups or incorrect installation. The function of the individual busbars can also be better visualized by highlighting them in color (e.g. differentiation between DC and AC busbars or polarity in the cabinet). Anodizing is cheaper than a galvanic coating of aluminum and still offers many advantages of an optical and anti-corrosive surface. that give the customer a correspondingly high-quality impression. In contrast to painting or shrinking, the colored surface cannot flake off.
  • a special feature is the coloring of the busbars with a color that deviates noticeably from the natural aluminum color and a color that serves a special purpose (functional color, e.g. polarity coding).
  • Another special feature is the breaking up of the paint layer at the contact points using the spraying process using cold gas coating.
  • a power converter can also have busbars both as aluminum busbars and also made of copper busbars.
  • the color of the aluminum busbar differs from the copper busbar.
  • a color for the aluminum busbar is assigned depending on the function and/or the hazard potential of the aluminum busbar of the power converter.
  • a color is specified for the respective aluminum busbar of the power converter.
  • busbars to which a low and therefore harmless voltage, also referred to as safety extra-low voltage, is applied can be marked with a specific color, for example green.
  • Low voltage up to 1000V can be marked with another color.
  • a specific color can also be provided for voltages over 1000V, often referred to as medium voltage or high voltage, since they pose a greater risk to maintenance personnel.
  • busbars for the transmission of direct current and/or which are charged with direct current.
  • the aluminum busbar can have a different color for busbars with AC voltage or for alternating current.
  • the aluminum busbar it is possible for the aluminum busbar to have different colors in order to signal both the function and the risk potential.
  • FIG. 2 shows a power converter with such an aluminum busbar.
  • 1 shows an aluminum busbar 1.
  • the surface 2 of the aluminum busbar 1 was subjected to an anodizing treatment as part of the manufacturing process.
  • a cold gas coating was then carried out on a first part 21 of the surface 2 .
  • This first surface represents the contact area at which electrical contact can be made with another component.
  • the first part 21 with the cold gas coating is often located at the end of the busbar, since this is usually provided for electrical contacting.
  • a second part 22 of the surface 2 has a predetermined color. This color can identify the function of the aluminum busbar, for example its use as a busbar for DC voltage or direct current or AC voltage or alternating current.
  • the second part 22 of the surface 2, which has a predetermined color, can, as shown, be located circumferentially around the aluminum busbar 1.
  • a flat or planar part, for example a side surface, of the aluminum flow surface has a color.
  • a flat rectangular part of a side surface of the aluminum bus bar 1 can have a predetermined color.
  • this conductor rail has another color on a third part 23 of its surface 2 .
  • This can be used, for example, to identify the risk potential, for example the voltage level such as safety extra-low voltage, low voltage or high voltage.
  • the different areas of the surface 2 are identified by different hatchings in FIG. The hatching runs all the way around, but it would be advantageous if only a mostly flat surface were coated.
  • the third part 23 of the surface can be colorless or the surface can only consist of a first part 21 and a second part 22 .
  • 2 shows a converter 10 with several aluminum busbars 1, which are arranged in a converter cabinet 31 of the converter 10.
  • the aluminum busbars 1 are used, among other things, to electrically connect electrical components 30, such as semiconductors, capacitors, coils, fuses or connections, to one another.
  • the aluminum busbars 1, which are arranged between the electrical components 30, can be busbars for the transmission of direct current, in which case a direct voltage is present between these two busbars. These are therefore marked with a fixed color.
  • the vertical ver in the converter 10 running groups of three aluminum busbars 1 can be used to transmit alternating current with an alternating voltage. Due to the different function, these have a different color than the specified color of the direct current busbar. This is marked in FIG. 2 by different hatching.
  • the surface 2 of the aluminum busbars 1 has only a first and a second part 21, 22 and thus only one color.
  • the invention relates to a method for producing an aluminum busbar for a converter or a converter with at least two aluminum busbars.
  • a first step the surface or at least parts of the surface of the aluminum busbar be given a predefinable color by means of an anodizing treatment, with a second step then being applied to at least a first part of the A cold gas coating is applied to the surface to create a contact surface.
  • the invention relates to an aluminum bus bar for a power converter manufactured by such a method, wherein the surface of the aluminum bus bar has a predetermined color which has been brought to the surface by means of the anodizing treatment.
  • the invention further relates to a power converter with such aluminum busbars, the color of at least two of the aluminum busbars of the power converter being different.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une barre omnibus en aluminium (1) pour un convertisseur de puissance (10). Afin d'améliorer l'installation et la maintenance d'un convertisseur de puissance doté d'une telle barre omnibus en aluminium, la surface (2) ou au moins des parties (21, 22, 23) de la surface (2) de la barre omnibus en aluminium (1) sont pourvues d'une ou plusieurs couleurs, qu'il est possible de spécifier, à l'aide d'un traitement d'anodisation lors d'une première étape. Lors d'une deuxième étape, un revêtement au gaz froid est utilisé au moins sur une première partie (21) de la surface pour produire une surface de contact. L'invention concerne en outre une barre omnibus en aluminium (1) pour un convertisseur de puissance (10), ladite barre omnibus étant produite à l'aide d'un tel procédé, la surface (2) de la barre omnibus en aluminium (1) ayant une couleur spécifiée qui a été appliquée sur la surface (2) à l'aide du traitement d'anodisation. L'invention concerne en outre un convertisseur de puissance (10) comprenant au moins une telle barre omnibus en aluminium (1), la couleur d'au moins deux des barres omnibus (1) du convertisseur de puissance (10) étant différente.
EP21728455.3A 2020-07-10 2021-05-10 Convertisseur de puissance à barres omnibus en aluminium anodisées en couleur et procédé de fabrication d'un tel convertisseur de puissance Pending EP4133122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20185313.2A EP3936640A1 (fr) 2020-07-10 2020-07-10 Barres omnibus anodisées colorées pourvu de revêtement par pulvérisation au gaz froid pour convertisseurs
PCT/EP2021/062335 WO2022008122A1 (fr) 2020-07-10 2021-05-10 Convertisseur de puissance à barres omnibus en aluminium anodisées en couleur et procédé de fabrication d'un tel convertisseur de puissance

Publications (1)

Publication Number Publication Date
EP4133122A1 true EP4133122A1 (fr) 2023-02-15

Family

ID=71575214

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20185313.2A Withdrawn EP3936640A1 (fr) 2020-07-10 2020-07-10 Barres omnibus anodisées colorées pourvu de revêtement par pulvérisation au gaz froid pour convertisseurs
EP21728455.3A Pending EP4133122A1 (fr) 2020-07-10 2021-05-10 Convertisseur de puissance à barres omnibus en aluminium anodisées en couleur et procédé de fabrication d'un tel convertisseur de puissance

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20185313.2A Withdrawn EP3936640A1 (fr) 2020-07-10 2020-07-10 Barres omnibus anodisées colorées pourvu de revêtement par pulvérisation au gaz froid pour convertisseurs

Country Status (4)

Country Link
US (1) US20230261584A1 (fr)
EP (2) EP3936640A1 (fr)
CN (1) CN115803482A (fr)
WO (1) WO2022008122A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100155251A1 (en) * 2008-12-23 2010-06-24 United Technologies Corporation Hard anodize of cold spray aluminum layer
US9663870B2 (en) * 2013-11-13 2017-05-30 Applied Materials, Inc. High purity metallic top coat for semiconductor manufacturing components
WO2015084331A1 (fr) * 2013-12-03 2015-06-11 Schneider Electric It Corporation Système d'isolation de barres omnibus à courant élevé

Also Published As

Publication number Publication date
CN115803482A (zh) 2023-03-14
EP3936640A1 (fr) 2022-01-12
US20230261584A1 (en) 2023-08-17
WO2022008122A1 (fr) 2022-01-13

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