EP2171834A2 - Procédé et dispositif de scellement pour un circuit d'excitation présent à l'intérieur d'un corps de rotor - Google Patents

Procédé et dispositif de scellement pour un circuit d'excitation présent à l'intérieur d'un corps de rotor

Info

Publication number
EP2171834A2
EP2171834A2 EP08774586A EP08774586A EP2171834A2 EP 2171834 A2 EP2171834 A2 EP 2171834A2 EP 08774586 A EP08774586 A EP 08774586A EP 08774586 A EP08774586 A EP 08774586A EP 2171834 A2 EP2171834 A2 EP 2171834A2
Authority
EP
European Patent Office
Prior art keywords
potting
rotor body
electrical components
casting
contacts
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.)
Withdrawn
Application number
EP08774586A
Other languages
German (de)
English (en)
Inventor
Ralf Cordes
Walter Fischer
Jürgen Huber
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 EP2171834A2 publication Critical patent/EP2171834A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/042—Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts

Definitions

  • the invention relates to a potting method and potting device for an existing within a rotor body exciter circuit.
  • Superconducting machines have exciting windings made of a superconductive material.
  • superconducting machines can have excitation windings which are manufactured from high-temperature superconducting material.
  • An excitation circuit for energizing the windings of an electrical machine is typically placed inside the rotor of the electrical machine.
  • Such an excitation circuit has inter alia an AC transformer and a rectifier.
  • Such an excitation circuit is apparent, for example, from DE 10 2005 047 541 A1.
  • An exciter circuit arranged inside the rotor of an electric machine is in operation of the electrical
  • An excitation circuit has partly complex switching circles, which may in particular have power electronic components such as IGBTs, MOSFETs, thyristors, power diodes, etc.
  • power electronic components such as IGBTs, MOSFETs, thyristors, power diodes, etc.
  • Such power electronic components cause significant amounts of heat loss during operation, which must be dissipated from the field of the excitation circuit.
  • the object of the present invention is to provide a potting method and a potting device for a field circuit arranged within a rotor body.
  • the casting method according to the invention and the casting device according to the invention should be improved with respect to the existing technical problems in the prior art.
  • a potting method for an exciter circuit is to be specified, which allows a mechanically stable encapsulation of the exciter circuit within the rotor body, at the same time ensuring good thermal coupling of the exciter circuit to the rotor body.
  • a casting device for such a method should be specified.
  • an encapsulation method is specified for a field circuit arranged inside a potting area inside a rotor body.
  • the potting region is delimited at the radially outer edge by the inside of a jacket of the rotor body or components thermally coupled directly to the jacket of the rotor body.
  • the casting area is bounded on both sides in the axial direction by a cover plate oriented substantially perpendicular to an axis of the rotor body and a base plate.
  • the exciter circuit comprises at least one circuit board with electrical components present on the board and contacts arranged at the edge of the board.
  • the casting method according to the invention has at least the following steps: Locking the exciter circuit in the Verguss Scheme, so that the contacts are arranged in a tolerance range around a cylinder jacket surface, wherein the cylinder jacket surface is oriented coaxially with the rotor body.
  • the aforementioned measures allow a simple and cavity-free potting of a field circuit inside a rotor body. In this way, advantageously, a good mechanical support of the exciter circuit can be achieved within the rotor body. Furthermore, with the aforementioned measures according to the invention, a good thermal coupling of the exciter circuit to the potting compound can be achieved. In particular, the electrical components of the exciter circuit can be coupled to the potting compound. By arranging the potting area in the edge region of the rotor, it is furthermore advantageously possible to achieve good thermal coupling of the potting compound and thus of the electrical components of the excitation circuit to the rotor shell.
  • the casting method according to claim 1 in particular with the features of one or more subordinate Sayings are combined. Accordingly, the casting method may still have the following features:
  • a displacement body Before the potting space is poured, a displacement body can be introduced into the potting space. By introducing a displacement body in the Vergussraum potting compound can be saved. By means of a displacement body, the potting volume can be further reduced. A reduced potting volume and thus a reduced potting compound leads to a reduction of in the
  • the different materials used in a field circuit typically have different material characteristic values, for example coefficients of expansion.
  • An adaptation of the expansion coefficient of the potting compound to all existing in the excitation circuit materials and their expansion coefficient is almost impossible. Since the extent behaves proportional to the mass of the material in question, it is advantageous to save potting compound by means of a displacement body and thus to minimize the forces acting on the components of the excitation circuit by the potting compound due to thermal expansion.
  • the displacement body can be adapted to a shape of the board and a shape of the existing electrical components on the board prior to introduction into the Vergussraum. By adapting the shape of the displacement body to the shape of the board and the components present on the board, further potting compound can be saved, which leads to further cost advantages.
  • the potting space can be heated to cure the potting compound.
  • Thermal hardening of the potting compound offers the procedural advantage of rapid process control and is therefore suitable for potting circuit gene in a rotor particularly advantageous.
  • the potting step may be carried out by a process of the following group: - atmosphere casting,
  • the aforementioned methods are particularly advantageous for potting exciter circuits in rotors.
  • the encapsulation of the excitation circuit within the casting area inside a rotor body can be carried out with a hybrid system consisting of a potting compound and an adhesive.
  • the casting with a reaction resin system based on one or more materials can be selected from the following group:
  • the encapsulation of a field circuit with a reaction resin system of potting compound and adhesive, in particular on the basis of an aforementioned material is particularly advantageous since mechanical stresses can be absorbed in such a system. Mechanical stresses can be the result of thermal cycling, as they can occur in rotors. A casting with a reaction resin system also has a high mechanical strength. Centripetal accelerations occurring in a rotor and the resulting forces can also be absorbed by a corresponding system.
  • the potting compound can be mixed with at least one material of the following material group.
  • the material group includes fillers, fibers, fabrics, hollow glass spheres, flakes and scrims.
  • a potting device for a within a Verguss Kunststoffes inside a rotor body arranged exciter circuit is specified.
  • the potting region is delimited at the radially outer edge by the inside of a jacket of the rotor body or components that are directly thermally connected to the shell of the rotor body.
  • the casting area in the axial direction is bounded on both sides by a cover plate oriented substantially perpendicular to the axis of the rotor body and a base plate.
  • the excitation circuit comprises at least one circuit board with electrical components present on the circuit board. Contacts with which the exciter circuit can be contacted are on
  • the casting device further comprises:
  • the cylindrical surface is oriented coaxially with the rotor body.
  • the casting device furthermore has a toroidal elastic ring, which is pressed against those contact surfaces of the contacts whose surface normal is oriented substantially in the direction of the axis. Furthermore, the toroidal elastic ring is used least pressed against the bottom plate for liquid-tight completion of Vergussraumes. The toroidal elastic ring is further pressed in such a way that all contact surfaces lying in the tolerance range are at least partially in contact with the toroidal elastic ring.
  • the potting device according to the invention can be combined with the features of a subclaim, in particular with the features of several subclaims. Accordingly, the potting device may still have the following features:
  • the holder for the electrical components of the field circuit may extend in the circumferential direction of the rotor body on the inside. On its radially inner side, the holder can have recesses or flattenings for positive reception of the electrical components. On its radially outer side, the holder can be adapted to the shape of the inner wall of the rotor body.
  • the electronic components of a field circuit can be kept mechanically stable inside the rotor body.
  • the electronic components can be power semiconductors.
  • a mechanically stable holder is particularly advantageous for the power semiconductors of a field circuit.
  • the electrical components can have heat transfer surfaces and the heat transfer surfaces can be a large area in thermal contact with the recesses or flattenings.
  • the recesses or flattenings may be oriented such that their surface normals point substantially in the radial direction.
  • a holder for the electrical components of a field circuit, which flat in contact with the heat transfer surfaces of the electrical components, said heat transfer surfaces continue to have with their surface normal substantially in a radial direction, on the one hand ensures a good thermal coupling of the electrical components to the Hal- sion and on the other a good mechanical support, in particular with respect the inclusion of centrifugal forces for the electrical components.
  • the electrical components can be bolted to the bracket.
  • the electrical components may be connected by brackets to the holder.
  • a mounting of the electrical components to the bracket by means of a screw or by brackets allows easy and quick installation.
  • the holder can be made of good thermally conductive material, preferably copper.
  • a good thermally conductive material, in particular copper allows a good thermal coupling of the electrical components to the holder and thus to the rotor body.
  • the waste heat generated in the electrical components can be dissipated to the rotor body in this way.
  • the holder can connect positively in the circumferential direction of the rotor to the inside of the rotor.
  • the holder On its radially inner side, the holder may have recesses with wall and bottom surfaces for the positive reception of the electrical components of the exciter circuit. The surface normals of the floor surfaces can be found in
  • a holder as described above allows a mechanically particularly stable recording of the electrical components of a field circuit.
  • the holder may consist for the most part of a fiber-reinforced plastic, in particular of a glass fiber reinforced, carbon fiber reinforced or aramid fiber reinforced plastic. Furthermore, the holding tion consist of a foam or have a sandwich construction. The aforementioned materials have a high strength with a low weight, which is particularly advantageous for the coverage of electronic components of a field circuit within a rotor.
  • the toroidal elastic ring may consist predominantly of silicone.
  • An embodiment of the toroidal elastic ring of silicone has the advantage that it is elastic and also adheres to the
  • the contacts can be made of copper. Copper provides good electrical and thermal conductivity, allowing it to make electrically secure contacts.
  • the casting device may comprise at least one displacement body which is adapted to the shape of the board (s) and in particular to the shape of the electrical components present on the board (s).
  • This displacement body may continue to consist predominantly of glass fiber reinforced plastic.
  • a displacement body offers the advantage that potting compound can be saved.
  • a displacement body which consists for the most part of glass fiber reinforced plastic, also offers the possibility of a significant weight reduction.
  • FIG. 1 shows a cross-sectional view of a potting device for a field circuit inside a rotor body
  • FIG. 2 shows a detailed view of a casting device
  • FIG. 3 shows two boards of a field circuit in perspective view
  • Figures 4 and 5 a holder for the electrical components of a field circuit.
  • FIG. 1 shows a potting device 100 for an excitation circuit arranged inside a potting area 101 in the interior of a rotor body.
  • the rotor body can be configured essentially rotationally symmetrical with respect to an axis A.
  • the potting region 101 extends in the circumferential direction in the edge region of the rotor body.
  • the excitation circuit consists of at least one circuit board 102, preferably of a plurality of circuit boards 102, 102 'and further preferably of further not on the or the board (s) arranged further electrical components 104. In the following, by way of example, only the case, in which the exciter circuit comprises only one circuit board.
  • the excitation circuit comprises electrical components 104 arranged on the circuit board 102.
  • the electrical components 104 may preferably be power-electronic components, such as IGBTs, MOSFETs, thyristors, power diodes, etc.
  • the rotor body which has a cover plate 107 and a bottom plate 108, is held by means of clamping screws 105.
  • the casting area 101 is at its radially outer Edge of the shell of the rotor body or other thermally directly connected to the shell of the rotor body further components of the rotor 106, 106 ', 106''limited.
  • the board 102 can be locked within the Verguss Kunststoffes 101 with generally technical measures. Furthermore, the circuit board 102 or even individual electrical components 104 of the excitation circuit can be locked with a special holder.
  • the circuit board 102 is locked within the casting region 101 in such a way that the contacts 103 come to lie in a tolerance range 109 which extends around a cylinder jacket surface 110.
  • the cylinder jacket surface 110 is substantially coaxial with the rotor body, and thus arranged substantially coaxially with the axis A. Along the circumference of the cylinder jacket surface 110 extends in the radial direction on both sides of the cylinder jacket surface 110, a tolerance range 109.
  • the tolerance range 109 may in particular have a predetermined radial width.
  • a toroidal elastic ring 112 is inserted from inside into the potting device 100.
  • the mandrel 111 may be cylindrical or conical.
  • the tous-shaped elastic ring 112 may preferably have a substantially rectangular cross-section.
  • the toroidal elastic ring 112 is inserted into the molding apparatus 100 in such a manner that the toroidal elastic ring 112 is pressed by the mandrel 111 against the lid plate 107 and the bottom plate 108 so that the molding portion 101 is sealed liquid-tight.
  • the toroidal elastic ring 112 may be inserted into the molding apparatus 100 so as to close the molding area 101 at the contact surface between the bottom plate 108 and the toroidal elastic ring 112 in a liquid-tight manner.
  • the cover plate 107 can be placed on the rotor body after casting has taken place; the actual casting takes place as a so-called open seal. molding.
  • the toroidal elastic ring 112 is pressed in by means of the mandrel 111 in such a way that the contact surfaces of the contacts 103 whose surface normal points in the direction of the axis A are in contact with the toroidal elastic ring 112 within the tolerance range 109.
  • potting compound can be filled into the potting area 101.
  • the boards 102 and further electrical components 104 are so in the
  • Potting area 101 arranged that the potting compound can wet the board 102 and the electrical components 104 on all exposed surfaces.
  • the circuit board 102 may for this purpose have openings or bores or be arranged in the potting region 101 such that corresponding gaps for the passage of the potting compound are present.
  • edges of the components to be cast can be bevelled, chamfered or rounded. Further projecting into the Vergussraum 101 rotor parts can also be chamfered, beveled or rounded. Thus, when curing the potting compound increased stresses in these areas can be avoided.
  • FIG. 2 shows a partial view of a potting device 100.
  • the potting device substantially corresponds to the left-hand part of the one shown in FIG. 1 as viewed from the axis A Potting device 100.
  • the potting device 100 shown in Figure 2 has a displacement body 201 which is disposed within the Vergussraumes 101.
  • the displacement body 201 may in particular be made of glass fiber reinforced plastic.
  • the displacement body 201 can furthermore be adapted in particular to the shape of the circuit board 102.
  • the displacement body 201 can continue to the present on the board 102 components 104, and the
  • the displacement body 201 may be adapted to other electrical components 103 of the exciter circuit which are not mounted on the circuit board 102.
  • An adaptation of the displacement body 201 can be done by molding or by 3D scanning.
  • the displacement body 201 potting compound can be saved.
  • the displacement body 201 may have a similar or almost the same coefficient of expansion as the potting compound. In this way, due to temperature changes occurring stress cracks or wall detachments can be reduced.
  • FIG. 3 shows two boards 102, 102 "of a field circuit in perspective view. For reasons of clarity, the components present on the boards 102, 102 '' are not shown.
  • the boards 102, 102 '' are arranged substantially plane-parallel to each other.
  • the direction R indicated in FIG. 3 points in the direction of the axis A.
  • FIG. 4 shows a holder 401 for the electrical components 104 of a field circuit.
  • the holder 401 is adapted to the shape of the rotor body 105 on its radially outer side, ie the side which faces the rotor body 105.
  • the holder 401 can likewise essentially form-fittingly connect to parts 106, 106 'connected directly to the rotor body 105.
  • the components 106, 106 'directly adjoining the rotor body 105 may in particular be thermally connected to the rotor body.
  • the holder 401 flattening 402 or exceptions for receiving electrical components 104.
  • the electrical components 104 may in particular be power semiconductors, such as IGBTs, MOSFETs, thyristors, power diodes, etc.
  • the electrical components 104 may have heat transfer surfaces, with which they connect to the holder 401 over a large area. In particular, the heat transfer surfaces of the electrical components 104 can connect over a large area to the flattenings or recesses 402.
  • the electrical components 104 may be screwed to the holder 401 or connected by clips to the holder 401.
  • the holder 401 may in particular be made of a material which is readily thermally conductive, and the holder 401 is preferably made of copper.
  • the surface normals of the flattenings or recesses 402 may in particular point with their surface normals in the direction of the axis of the rotor body. Centripetal accelerations acting on the electrical components 104 can thus be absorbed by the holder over a large area.
  • the flattening or recesses 402 can furthermore be designed in particular such that they receive the electrical components 104 in a form-fitting manner.
  • FIG. 5 shows a further holder 501 for receiving electrical components 104 of a field circuit.
  • the components 104 may in particular be capacitors.
  • the holder 501 is adapted in a form-fitting manner to the rotor body 105 on its radially outer side.
  • the holder 501 can furthermore be adapted in a form-fitting manner to components 106, 106 'connected directly to the rotor body 105.
  • the holder 501 On its radially inner side, the holder 501 has recesses with wall and bottom surfaces (502, 503) for the positive reception of the electrical components 104.
  • the bottom surfaces (503) of the recesses may be oriented in such a way that their surface normal points in the direction of the axis of the rotor 105.
  • the holder 501 may in particular be made of a glass fiber reinforced plastic.
  • the toroidal elastic ring 112 may be made of silicone or a silicone-like material in particular.
  • the excitation circuit disposed within the rotor can be encapsulated with a device according to an embodiment of the drawings explained above.
  • the casting method according to the invention can be developed in accordance with the following explanations.
  • the potting space can be heated by means of suitable measures for curing the potting compound.
  • an atmosphere casting method an atmosphere casting method, a vacuum casting method, a pressure gelling method, an injection molding method or a hotmelt method may be used.
  • a material system for potting can continue to find a hybrid system of a potting compound and an adhesive use.
  • the casting can be carried out with a reaction resin system based on one or more of the following materials, epoxy resin, polyurethane, silicone, polyester resin, polyester imide resin and / or hydrocarbon resin.
  • a reaction resin system based on one or more of the following materials, epoxy resin, polyurethane, silicone, polyester resin, polyester imide resin and / or hydrocarbon resin.
  • it can be further added with fillers, fibers, hollow glass spheres, flakes, fabrics and / or layers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)

Abstract

L'invention concerne un procédé de scellement et un dispositif (100) pour sceller un circuit d'excitation présent à l'intérieur d'un corps de rotor. Le circuit d'excitation présente une platine (102, 103) comportant des contacts (103, 103') situés au bord de cette dernière. Les contacts (103, 103') sont placés dans une zone de tolérance autour d'une surface extérieure cylindrique (110) orientée concentriquement par rapport au corps de rotor. Le circuit d'excitation se trouve à l'intérieur d'une zone de scellement (101) qui est scellée de façon étanche aux fluides par une bague élastique (112) conique de sorte que, simultanément, les surfaces des contacts (103, 103'), qui se trouvent à l'intérieur de la zone de tolérance (109), soient en contact avec la bague élastique (112) conique.
EP08774586A 2007-07-04 2008-07-01 Procédé et dispositif de scellement pour un circuit d'excitation présent à l'intérieur d'un corps de rotor Withdrawn EP2171834A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007030963A DE102007030963A1 (de) 2007-07-04 2007-07-04 Vergussverfahren sowie Vergussvorrichtung für eine innerhalb eines Rotorkörpers vorhandene Erregerschaltung
PCT/EP2008/058440 WO2009004003A2 (fr) 2007-07-04 2008-07-01 Procédé et dispositif de scellement pour un circuit d'excitation présent à l'intérieur d'un corps de rotor

Publications (1)

Publication Number Publication Date
EP2171834A2 true EP2171834A2 (fr) 2010-04-07

Family

ID=40092364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08774586A Withdrawn EP2171834A2 (fr) 2007-07-04 2008-07-01 Procédé et dispositif de scellement pour un circuit d'excitation présent à l'intérieur d'un corps de rotor

Country Status (5)

Country Link
US (1) US20100264563A1 (fr)
EP (1) EP2171834A2 (fr)
CN (1) CN101689791B (fr)
DE (1) DE102007030963A1 (fr)
WO (1) WO2009004003A2 (fr)

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DE102009014960A1 (de) 2009-03-30 2010-10-07 Sew-Eurodrive Gmbh & Co. Kg Elektromaschine
EP3050193B1 (fr) * 2013-09-26 2021-12-29 Dominion Alternative Energy, LLC Générateur et moteur électrique supraconducteur
EP2874280A1 (fr) 2013-11-14 2015-05-20 Siemens Aktiengesellschaft Masse de fermeture à encoche, fermeture à encoche et procédé de fabrication d'une fermeture à encoche
DE102017214766B4 (de) * 2017-08-23 2023-02-02 Vitesco Technologies GmbH Elektrische Maschine mit einem Leistungsübertragungssystem zum Erzeugen eines Stroms in einer Erregerwicklung eines Rotors der elektrischen Maschine und Kraftfahrzeug
DE102018221887A1 (de) * 2018-12-17 2020-06-18 Audi Ag Verfahren zum Vollverguss eines mit Rotorwicklung ausgebildeten Rotors für eine elektrische Maschine
DE102020111333A1 (de) 2020-04-27 2021-10-28 Audi Aktiengesellschaft Verfahren zum Vergießen eines FSM-Rotors und FSM-Rotor mit Hybridrotorverguss
DE102020111815A1 (de) 2020-04-30 2021-11-04 Bayerische Motoren Werke Aktiengesellschaft Rotor sowie Verfahren zum Herstellen eines Rotors
RU2762289C1 (ru) * 2021-01-11 2021-12-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" Установка подсушки изоляции обмоток трехфазного асинхронного электродвигателя в технологической паузе
DE102021133129A1 (de) 2021-12-14 2023-06-15 Jungheinrich Aktiengesellschaft Antriebsachsenanordnung für ein elektrisch angetriebenes Flurförderzeug

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Also Published As

Publication number Publication date
CN101689791A (zh) 2010-03-31
CN101689791B (zh) 2012-07-25
WO2009004003A3 (fr) 2009-02-19
DE102007030963A1 (de) 2009-01-08
US20100264563A1 (en) 2010-10-21
WO2009004003A9 (fr) 2010-03-25
WO2009004003A2 (fr) 2009-01-08

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