EP3288046B1 - Dispositif de bobines - Google Patents

Dispositif de bobines Download PDF

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Publication number
EP3288046B1
EP3288046B1 EP16185586.1A EP16185586A EP3288046B1 EP 3288046 B1 EP3288046 B1 EP 3288046B1 EP 16185586 A EP16185586 A EP 16185586A EP 3288046 B1 EP3288046 B1 EP 3288046B1
Authority
EP
European Patent Office
Prior art keywords
coil device
coil
cooling plate
cooling
windings
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
EP16185586.1A
Other languages
German (de)
English (en)
Other versions
EP3288046A1 (fr
Inventor
Ingolf Hoffmann
Stephan Ippisch
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP16185586.1A priority Critical patent/EP3288046B1/fr
Priority to PCT/EP2017/070011 priority patent/WO2018036805A1/fr
Priority to EP17752092.1A priority patent/EP3455863A1/fr
Priority to US16/327,096 priority patent/US11443882B2/en
Priority to CN201780051258.6A priority patent/CN109643600B/zh
Publication of EP3288046A1 publication Critical patent/EP3288046A1/fr
Application granted granted Critical
Publication of EP3288046B1 publication Critical patent/EP3288046B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • the invention relates to a coil device according to the preamble of claim 1.
  • a plurality of coil devices for example choke coils, which are wound from several layers of an insulated conductor, are known from the prior art. Due to the electrical stress on a coil device, thermal losses occur, for example within the windings of the coil device or in its coil core, which is formed, for example, from iron. Typically, the individual windings of the coil device are electrically insulated from one another by the introduction of an insulating material. Sufficiently good heat dissipation from the coil device must be ensured here. A preferred cooling or cooling of the coil device or its winding layers is contact-dimensioned so that the specified installation space can be used as optimally as possible.
  • a cooling plate is introduced into the coil device, for example, which must be electrically insulated from a yoke of a winding of the coil device in particular.
  • a cooling plate in particular a metallic cooling plate, within the coil device has the disadvantage that, due to the magnetic fields that occur, electrical currents are induced in it, which lead to losses (ohmic losses due to eddy currents).
  • water cooling systems are known from the prior art, which are used in particular for choke coils and are based on the introduction of metallic heat sinks into the coil device.
  • Waveguides which are used for the windings of the coil device are known from the prior art.
  • a coolant can be passed through the hollow conductor, which cools the coil device.
  • Cooling bags made of plastic with a Y-structure are known, which can be introduced into the coil device or one of its windings.
  • these are at least partially embedded in a resin, so that air inclusions can be reduced or, at best, prevented.
  • a liquid-cooled electromagnetic component such as a choke or a transformer, which consists of several disc-shaped coils with one or more turns and flat coolers in between, with at least two disk coils being assigned to a flat cooler and in which all winding elements or turns of the coil are direct have thermal contact with the surfaces of the flat cooler.
  • the present invention is based on the object of providing a coil device with improved cooling.
  • the coil device according to the invention for a power converter comprises a cooling plate and a plurality N 3 3 of coil windings, the cooling plate being thermally coupled to at least one end face of one of the coil windings.
  • the coil device has at least three coil windings.
  • the cooling channel extends around each of the three coil windings. This advantageously ensures improved heat dissipation from the coil windings.
  • the end face of the coil winding is particularly preferred here, since it typically has a sufficiently large area and is therefore particularly suitable for cooling the coil windings.
  • the inventive symmetrical structure of the coil device which is given by the spatial arrangement of the coil windings at an angle of 2 ⁇ / N , results in an electromagnetically advantageous arrangement which is particularly preferred for cooling the coil device.
  • the cooling plate and its cooling channel can be manufactured, for example, by means of a regenerative method, in particular 3D printing. Furthermore, the cooling channel is suitable for receiving a coolant, for example water, in particular a fluoroketone, for cooling or cooling the coil device.
  • the coolant provided for cooling is particularly preferably electrically non-conductive. As a result, eddy currents within the cooling plate can advantageously be reduced.
  • Another advantage of the present invention is that all coil windings of the coil device are cooled by means of a common cooling channel.
  • the cooling channel extends at least partially around each of the coil windings.
  • the mechanical stability of the coil device is improved by the cooling plate.
  • the coil device can be pressed by means of the cooling plate or by means of a plurality of cooling plates, so that the weight of the coil device according to the invention is reduced and installation space can also be saved.
  • the coil device comprises exactly three coil windings.
  • the three coil windings correspond to the three known phases of the three-phase alternating current.
  • a coil device is provided for each phase of the three-phase alternating current.
  • the coil device according to the invention can thus be provided for a power converter, in particular a converter.
  • the extension of the cooling channel takes place in such a way that it extends as long as possible and as close as possible around the coil windings. This advantageously improves the cooling of the coil device by means of the cooling plate.
  • the cross section of the cooling channel is enlarged in the area of the coil winding.
  • the cooling plate is triangular or triangular.
  • the cooling plate has three side edges, the cooling channel extending along two side edges of the three side edges.
  • the heat is advantageously given off to the surroundings of the cooling plate via at least two of the side edges.
  • the flow and return for the cooling channel and / or further mechanical, electrical, thermal and / or fluidic connections for the coil device can advantageously be provided.
  • the cooling plate has at least one recess, in particular a slot.
  • the occurrence of eddy currents and their effects can thereby advantageously be reduced. This advantageously improves the cooling of the coil device and the cooling plate. Furthermore, the efficiency of an electrical machine, which comprises the coil device, for example, is improved.
  • the recess is star-shaped or star-shaped.
  • the recess is formed from a plurality of slots, the slots extending in a star-like manner in different directions, starting from a common center.
  • the cooling channel extends in a tab-like manner between the slots.
  • the cooling plate is arranged on winding cores of the coil windings, a side surface of the cooling plate facing the winding cores having an electrically insulating layer or coating.
  • the cooling plate is constructed in at least two parts.
  • the first part of the cooling plate, which includes the cooling channel, is made, for example, of aluminum and / or copper, that is, made of a metallic and highly thermally conductive material.
  • a second part of the cooling plate is formed by means of the electrically insulating layer or coating.
  • an electrically insulating thermal interface material can be provided for the electrically insulating layer.
  • TIM electrically insulating thermal interface material
  • the guide of a coolant is arranged in the metallic part of the cooling plate (first part) and the electrically insulating components of the cooling plate, i.e. the electrically insulating layer, are formed by simple end plates without contacting and contouring are.
  • a side surface of the cooling plate facing away from the winding core has an electrically insulating layer or coating.
  • the winding cores and the coil windings of the coil device can be isolated from a yoke, in particular an iron yoke.
  • the cooling plate is formed from aluminum, copper, stainless steel or cupronickel ferrite or a mixture thereof.
  • the cooling plate can comprise further materials or substances, for example plastics, in particular PPS or a ceramic, for example aluminum nitride.
  • plastics in particular PPS or a ceramic, for example aluminum nitride.
  • the mentioned Metallic materials that is to say aluminum, copper, stainless steel or copper-nickel ferrite advantageously have a high thermal conductivity, so that the thermal cooling of the coil device or the cooling plate is improved.
  • each of the coil windings has a contacting element for electrical contacting, each of the contacting elements being at least partially surrounded by the cooling channel.
  • the contacting elements are also at least partially cooled by the cooling channel which at least partially surrounds them.
  • the contacting elements are preferably designed as copper tabs, in particular as curved copper tabs.
  • the coil device 1 comprises a cooling plate 2 which has a cooling channel 24.
  • the cooling channel 24 is designed and provided for guiding a coolant, for example water or a fluid, which in particular comprises a fluoroketone.
  • the cooling channel 24 has a flow 61 and a return 62.
  • the cooling plate 2 of the coil device 1 is triangular.
  • the cooling plate 2 has three side edges 21, 22, 23 which form the sides of an imaginary isosceles triangle.
  • the corners of the imaginary isosceles triangle are rounded off so that installation space is saved.
  • eddy currents within the cooling plate 2 can be reduced by the rounded corners.
  • a recess 8 which is designed as a slot, is provided.
  • the slot 8, which is elongated, extends from a center 800 of the cooling plate 2, in particular a center of symmetry of the cooling plate 2, to the third side edge 23 of the cooling plate 2. Furthermore, the recess 8 lies between two sections of the cooling channel 24.
  • the coil device 1 has three coil windings 4, which are circular in cross section in the figure shown are trained. Furthermore, the coil windings 4 have an end face 400 which is formed, for example, by an end face of a winding core that is assigned to the respective coil winding 4.
  • the coil windings 4 are arranged symmetrically to one another.
  • the coil windings 4 are spatially offset from one another by the angle 41 of 2 ⁇ / 3.
  • the angle 41 relates to the common center 800.
  • the coil windings 4 are arranged essentially in the area of the rounded corners of the triangular cooling plate 2.
  • the cooling channel 24 extends at least partially along the coil windings 4.
  • the cooling channel 24 preferably extends almost completely along the coil windings 4. In other words, the coil windings 4 are surrounded by the cooling channel 24 except for an angle 43.
  • the cooling channel 24 extends at least over an angle 42 of at least 5 ⁇ / 3 , in particular of at least 11 ⁇ / 3, particularly preferably of 2 ⁇ around the respective coil winding 4.
  • the angle 43 leads to a recess of an angular range of the Coil winding 4 which is not surrounded by the cooling channel 24 and which corresponds to the angle 43. In other words, an angle sum formed from angle 42 and angle 43 has the value 2 ⁇ .
  • the angular range which corresponds to the angle 43 can be provided for electrical contacting by means of contacting elements 10, in particular by means of a bent copper tab.
  • the course of the cooling channel 24 advantageously enables a preferred cooling of the coil devices 4 by means of the cooling plate 2.
  • the mechanical stability of the coil device 1 is increased and improved by the cooling plate 2.
  • installation space and weight can be saved. In other words a compression of the coil device 1 is made possible by the cooling plate 2.
  • the aforementioned pressing of the cooling plate 2 with the end faces 400 of the coil devices 4 is facilitated.
  • FIG. 2 shows a plan view of a coil device 1 according to the invention, which is comparable to that in FIG Figure 1 is illustrated coil device. In other words, this can be under Figure 1 Said on Figure 2 applied and transmitted.
  • the coil device 1 in Figure 2 has a T-shaped or T-shaped cooling plate 2. Also shows Figure 2 a more complex arrangement and extension of the cooling channel 24. This extends in a meandering manner within the cooling plate 2 around the coil devices 4.
  • An advantage of the meandering arrangement of the cooling channel 24 is that it improves the cooling of the cooling plate 2 and thus of the coil device 1.
  • the flow 61 and the return 62 of the cooling channel 24 can be arranged in a common area of the cooling plate 2, so that their fluidic contact is simplified.
  • FIG. 1 has the coil device in Figure 2 a recess 8 which extends radially outward from a center 800.
  • a circular recess is provided within the center 800. This enables the cooling plate 2 to be plugged onto a common axis which is provided for the arrangement of the coil devices 4. Furthermore, this makes it easier to press the cooling plate 2 with the end faces 400 of the coil devices 4.
  • FIG 3 a further plan view of a coil device 1 according to the invention is shown.
  • Figure 3 essentially the same items as before Figure 1 and or Figure 2 .
  • FIG. 3 points in contrast to the Figures 1 and / or 2 a star-shaped or star-shaped cooling plate 2. This advantageously saves additional installation space.
  • the cooling plate 2 in turn has a cooling channel 24 which extends at least partially around the coil windings 4 of the coil devices 1.
  • the flow 61 and return 62 of the cooling channel 24 are arranged within a common area, so that their fluidic contact is facilitated and improved.
  • the coil device 1 has a recess 8 which is star-like or star-shaped. For this purpose, it has a plurality of elongated slots 81 which extend from the common center 800 in different directions. This advantageously significantly reduces the formation of eddy currents.
  • One of the slots 81 is arranged between the flow 61 and the return 62 of the cooling channel 24. In other words, the feed 61 and the return 62 are spaced apart by one of the slots 81.
  • the dashed lines correspond to an alternative extension of the cooling channel 24.
  • the cooling channel 24 extends in a tab-like manner between two adjacent slots 81. This advantageously improves the cooling of the coil device.
  • the coil device 1 has contacting elements 10, in particular copper tabs, which are arranged between the coil devices 4 and the cooling channel 24.
  • the cooling channel 24 extends along the contacting elements 10, so that they are cooled by the cooling channel 24 or by a coolant which is arranged within the cooling channel 24 or flows through it.
  • Figure 4 is a side sectional view of part of a coil device 1 according to the invention.
  • an electrically insulating coating 14 is arranged or applied on a side of the cooling plate 2 facing the coil winding 4. This serves to electrically isolate the cooling plate 2 from the voltage-carrying components of the coil winding 4.
  • the electrically insulating material or the insulating coating 14 can be formed, for example, from a low-water absorbing plastic, in particular PPS, or a ceramic, for example aluminum nitrite.
  • an arrangement by means of a silicone layer is advantageous, since unevenness of the coil winding 4 and / or the cooling plate 2 can be compensated for.
  • a further electrically insulating layer or coating 16 is applied on a side of the cooling plate 2 facing away from the coil winding 4. Like the electrically insulating layer 14, it can be formed from a plastic that does not absorb much water, for example PPS, or a ceramic, for example aluminum nitrite. The further electrically insulating layer 16 is provided for electrical insulation from an iron yoke 12 of the coil device 1.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (15)

  1. Dispositif (1) de bobine d'un onduleur, comprenant une plaque (2) de refroidissement et une pluralité N≥ 3 d'enroulements (4) de bobine, la plaque (2) de refroidissement étant couplée thermiquement à au moins un côté (400) frontal de l'un des enroulements (4) de bobine, caractérisé en ce que les enroulements (4) de bobine sont disposés de manière décalés dans l'espace les uns par rapport aux autres d'un angle (41) de 2π/N et la plaque (2) de refroidissement a un conduit (24) de refroidissement, qui s'étend, au moins en partie, autour de chacun des N enroulements (4) de bobine.
  2. Dispositif (1) de bobine suivant la revendication 1, caractérisé en ce que celui-ci comprend exactement trois enroulements (4) de bobine.
  3. Dispositif (1) de bobine suivant la revendication 1 ou 2, caractérisé en ce que le conduit (24) de refroidissement s'étend autour de l'enroulement (4) de bobine respectif sur un angle d'au moins 5π/3, notamment d'au moins 11π/6, d'une manière particulièrement préférée de 2π.
  4. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que la section transversale du conduit (24) de refroidissement est agrandie dans la partie des enroulements (4) de bobine.
  5. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que la plaque (2) de refroidissement est constituée en étant de type en triangle ou en forme de triangle.
  6. Dispositif (1) de bobine suivant la revendication 5, caractérisé en ce que la plaque (2) de refroidissement a trois bords (21, 22, 23) latéraux, le conduit (24) de refroidissement s'étendant le long de deux bords (21, 22) latéraux parmi les trois bords (21, 22, 23) latéraux.
  7. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que la plaque (2) de refroidissement a au moins un évidement (8), notamment une fente.
  8. Dispositif (1) de bobine suivant la revendication 7, caractérisé en ce que l'évidement (8) est constitué en étant de type à étoile ou en étant de forme en étoile.
  9. Dispositif (1) de bobine suivant la revendication 8, caractérisé en ce que l'évidement (8) est formé d'une pluralité de fentes (81), les fentes (81) s'étendant dans des directions différentes à la façon d'une étoile à partir d'un centre (800) commun.
  10. Dispositif (1) de bobine suivant la revendication 9, caractérisé en ce que le conduit (24) de refroidissement s'étend à la manière d'une languette entre les fentes (81).
  11. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que la plaque (2) de refroidissement est montée sur des noyaux des enroulements (4) de bobine, une surface latérale, tournée vers les noyaux d'enroulement, de la plaque (2) de refroidissement ayant une couche (14) ou un revêtement isolant du point de vue électrique.
  12. Dispositif (1) de bobine suivant la revendication 11, caractérisé en ce que une surface latérale, loin des noyaux des enroulements, de la plaque (2) de refroidissement a une couche (16) ou un revêtement isolant du point de vue électrique.
  13. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que la plaque (2) de refroidissement est en aluminium, cuivre, acier fin, cuivre-nickel-ferrite ou en l'un de leurs mélanges.
  14. Dispositif (1) de bobine suivant l'une des revendications précédentes, caractérisé en ce que chacun des enroulements (4) de bobine a un élément (10) de mise en contact pour la mise en contact électrique, chacun des éléments (10) de mise en contact étant entouré, au moins en partie, du conduit (24) de refroidissement.
  15. Dispositif (1) de bobine suivant la revendication 14, caractérisé en ce que les éléments (10) de mise en contact sont constitués sous la forme de languettes de cuivre.
EP16185586.1A 2016-08-25 2016-08-25 Dispositif de bobines Active EP3288046B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16185586.1A EP3288046B1 (fr) 2016-08-25 2016-08-25 Dispositif de bobines
PCT/EP2017/070011 WO2018036805A1 (fr) 2016-08-25 2017-08-08 Dispositif de bobines
EP17752092.1A EP3455863A1 (fr) 2016-08-25 2017-08-08 Dispositif de bobines
US16/327,096 US11443882B2 (en) 2016-08-25 2017-08-08 Coil device
CN201780051258.6A CN109643600B (zh) 2016-08-25 2017-08-08 线圈装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16185586.1A EP3288046B1 (fr) 2016-08-25 2016-08-25 Dispositif de bobines

Publications (2)

Publication Number Publication Date
EP3288046A1 EP3288046A1 (fr) 2018-02-28
EP3288046B1 true EP3288046B1 (fr) 2021-04-14

Family

ID=56800207

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16185586.1A Active EP3288046B1 (fr) 2016-08-25 2016-08-25 Dispositif de bobines
EP17752092.1A Withdrawn EP3455863A1 (fr) 2016-08-25 2017-08-08 Dispositif de bobines

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17752092.1A Withdrawn EP3455863A1 (fr) 2016-08-25 2017-08-08 Dispositif de bobines

Country Status (4)

Country Link
US (1) US11443882B2 (fr)
EP (2) EP3288046B1 (fr)
CN (1) CN109643600B (fr)
WO (1) WO2018036805A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3288046B1 (fr) 2016-08-25 2021-04-14 Siemens Aktiengesellschaft Dispositif de bobines
US20210249182A1 (en) * 2018-11-12 2021-08-12 Carrier Corporation Cooled transformer for an energy storage device
DE102020200306A1 (de) * 2020-01-13 2021-07-15 Zf Friedrichshafen Ag Kühlkörper, Leistungsmodulzusammenstellung und Wechselrichter

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EP3288046B1 (fr) 2016-08-25 2021-04-14 Siemens Aktiengesellschaft Dispositif de bobines

Also Published As

Publication number Publication date
CN109643600A (zh) 2019-04-16
EP3288046A1 (fr) 2018-02-28
EP3455863A1 (fr) 2019-03-20
US20190180907A1 (en) 2019-06-13
CN109643600B (zh) 2021-06-25
US11443882B2 (en) 2022-09-13
WO2018036805A1 (fr) 2018-03-01

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