EP0688028A1 - Coupleur électromagnétique - Google Patents

Coupleur électromagnétique Download PDF

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Publication number
EP0688028A1
EP0688028A1 EP95810366A EP95810366A EP0688028A1 EP 0688028 A1 EP0688028 A1 EP 0688028A1 EP 95810366 A EP95810366 A EP 95810366A EP 95810366 A EP95810366 A EP 95810366A EP 0688028 A1 EP0688028 A1 EP 0688028A1
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EP
European Patent Office
Prior art keywords
electromagnetic coupler
coupler according
legs
ring
sheets
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Withdrawn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
EP95810366A
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German (de)
English (en)
Inventor
Karl-Heinz Schmall
Michael Blessing
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0688028A1 publication Critical patent/EP0688028A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Definitions

  • the invention relates to an electromagnetic coupler for energy transmission with a primary and secondary circuit.
  • the primary circle and secondary circle rotate relative to each other.
  • the primary circuit induces current in the secondary circuit, so that the energy transfer is effected without contact and in particular without slip rings.
  • Couplers of this type are primarily used in the area of lathes and systems, where an electrical consumer is arranged on a rotating machine part.
  • Couplers with ferrite cores are known.
  • the performance achieved is low, the mechanical strength of ferrite cores is low and, moreover, the production is complex and expensive.
  • the invention is based on the object of providing an electromagnetic coupler which, with a simple structure, is suitable for the transmission of high powers (several kilowatts).
  • the primary circuit and the secondary circuit can be constructed in different lengths and designs from identical sheets.
  • the ring-shaped core arrangement also allows a structure in which the coupler can be arranged on a rotating shaft, making the special arrangement on the end face of a shaft or on a separate drive element superfluous.
  • the fact that the end faces of the legs limit the air gap means that the core arrangements of the primary circuit and the secondary circuit can be mechanically completed and assembled.
  • the gaps can be filled, which arise radially outwards due to the increase in diameter, so that the legs are packed tightly at least in the areas adjacent to the air gap and ensure high flow.
  • the front sides of the legs can then be ground to size so that the smallest air gaps can be achieved.
  • the layered core arrangements of transformer sheets allow a simple and inexpensive construction of the core arrangement, the use of sheets with a U-shaped recess on the one hand defining the recesses for receiving the toroidal coils and on the other hand the end faces of the legs the air gap between the primary -Circle and the secondary circle.
  • Such an arrangement can also be particularly advantageously poured out with casting compound in known manner, after which the end faces of the legs can be ground flat.
  • the primary circuit and secondary circuit are arranged next to one another and the air gap runs radially between the end faces of the legs.
  • the primary circuit and secondary circuit can also be formed as identical components, which improves economy and transmission properties.
  • the magnetic properties of the core arrangement are ensured in that at least one part of the sheets which delimit successive depressions has two the thighs lie side by side.
  • E-shaped blanks with three or four legs can be provided and the additional sheet metal sections can be simply rectangular and at least in the area of the inner core arrangement in such a number can be inserted between the legs of the E-blanks that the front of the legs is tightly packed throughout.
  • the respective coil lengths are the same on such an arrangement on the primary side and secondary side.
  • the packets in the area of the radially outer ring coils have a larger number of layered sheets than the packets in the area of the inner ring coil.
  • the entire core arrangement can be constructed economically from U-shaped metal sheets, which each overlap with one leg in the region of adjoining depressions, and the length differences can can be compensated for by L-shaped sheet metal blanks.
  • sheets are provided which have three legs and thus form two depressions for ring coils and / or if sheets are provided which have four legs and thus form three depressions for ring coils, the sheets also having the lower number of legs are used in each case in the outer region of the core arrangement to compensate for gaps by increasing the radial circumference.
  • the packets are designed as ring segments and are shortened in their radially outer region in such a way that they cover a smaller angular segment than in their inner region. This reduces the effective area of the elements in the outer area and compensates for the transmission / coupling of the different ring coils.
  • Spacers which are arranged between the ring segments have proven useful for mechanically strengthening the core arrangement, for holding the ring coils and also for separating the individual ring segments.
  • the shortening of the outer magnetic circuits described above can be ensured by the wedge-shaped design of the spacer elements.
  • the core arrangement is arranged in an annular housing with a U-shaped opening on the side. After the core arrangement has been introduced into the U-shaped opening, the overall arrangement can be cast and thereby connected to the housing. As material for the housing aluminum has proven particularly useful. The core arrangement and / or the spacer elements can be mechanically connected to the housing, which further improves the strength of the overall arrangement.
  • the primary circuit 1 and the identical secondary circuit 2 of an electromagnetic coupler 3, which is indicated schematically in FIG. 2, contains a core arrangement 4.
  • the core arrangement 4 has radially extending, layered sheets 5, which are connected by a casting compound and not by one holding device shown are held together.
  • the sheets 5 delimit recesses 6 which have a U-shaped cross section.
  • the recesses 6 are delimited by legs 7 of the sheets 5.
  • Annular coils 8, 9, 10 are provided in the recesses and are also fixed by a casting compound.
  • the primary circuit 1 is arranged in a stationary manner, while the secondary circuit 2 is fastened on a rotating shaft.
  • the ring coils 8, 9, 10 of the primary circuit 1 are fed with a three-phase three-phase current by a current source, not shown.
  • the frequency is approximately 500 to 8,000 Hz.
  • An air gap 11 is defined by the end faces of the legs 7 of primary circuit 1 and secondary circuit 2. Due to the alternating field generated in the primary circuit, alternating current of the same frequency with an output of approximately four kilowatts is transmitted to the three coils of the secondary circuit (2).
  • the inner diameter of the core arrangement 4 is approximately 30 cm.
  • the outside diameter is about 45 cm.
  • Each of the depressions 6 is about 1 cm wide and 4 deep.
  • Commercially available transformer sheets are used which are separated from one another by insulating layers (the insulating layers are omitted in the drawings for the sake of simplicity).
  • the stator absorbs a large part of the heat loss (approx. 10 to 20% of the transmission power).
  • the back of the stator can therefore be cooled by cooling fins (not shown) and suitable fans can be provided for air cooling.
  • the end face of the legs 7 is ground flat, so that a small air gap of 0.1 mm to 0.3 mm can be maintained between the primary circuit 1 and the secondary circuit 2, as a result of which the coupling factor can be kept relatively high.
  • the core arrangement 4 is subdivided into individual laminated cores 12, 13, 14 which are designed as ring segments 15. Spacer elements 16 are arranged between the ring segments 15 and, like the packages 12, 13, 14, are connected to a holder (not shown).
  • the spacer elements 16 cover the ring coils 8, 10 and fix them on the holder, not shown, as can be seen in particular from the sectional view in FIG. 4.
  • 5a and 5b show a U-shaped sheet metal blank 5a with two legs 7a and 7b, which delimit a U-shaped recess 6.
  • 5c and 5d show an L-shaped sheet metal blank 5b with a leg 7c.
  • the U-shaped sheet metal blanks 5a 1 are layered directly in the region of the inner radius r.
  • the legs 7b1 of the blanks 5a1 are laterally layered on the legs 7b2 of the U-shaped sheet metal blanks 5a2, which are arranged in the region of the central ring coil 9.
  • the sheet blanks 5a1 and 5a2 So they overlap in their thigh area and thus guarantee good flow properties of the overall arrangement. Since the circle length increases with increasing radius from the inner radius r to the outer radius R, L-shaped sheet metal blanks are layered between the U-shaped sheet metal blanks 5a 1 to 5 a 3 to fill the gaps in order to fill the packing density of the core arrangement 4 to optimize.
  • FIG. 7 shows modified sheet metal blanks 20a to 20d. Analogously to FIG. 6, these blanks can be layered in such a way that the blanks with the smaller number of legs 20b, 20c, 20d in the region of the outer radius R are used to fill gaps in the laminated cores 12, 13, 14 (FIG. 3) which are due to of the greater arc length in the area of the radius R.
  • FIG. 8 shows a modified exemplary embodiment in which a laminated core 12 (which exemplifies all laminated cores) is shortened in the area of the outer radius R, so that the covered angle ⁇ is smaller than the angle ⁇ in the area of the inner radius r.
  • the total length of the end faces 22 of the legs 7 is approximated, so that the induction in the area of the three ring coils 8, 9, 10 does not deviate too much due to an extended flux passage area in the area of the outer radius R.
  • FIG. 9 shows a further modified exemplary embodiment, in which the core arrangement 4, in addition to the ring coils 8, 9, 10, is provided with signal coils 24, 25 (or rings), by means of which control signals from the primary circuit 1 to the secondary circuit 2 or can be transferred inductively or capacitively from the secondary circuit 2 to the primary circuit 1.
  • both the exemplary embodiment 8 and the exemplary embodiment 9 can be realized by sheet metal blanks according to FIGS. 5a to 7. But there are also modified embodiments of sheet metal blanks are conceivable as long as gaps between the sheets can be filled by lateral overlapping of legs and by narrower blanks (analogous to FIGS. 5c and 7).
  • a housing 28 which has an outer reinforcing ring 26, an inner ring 27 and a bottom part 29.
  • the housing 28 is thus U-shaped in cross section and the core arrangement 4 is inserted and potted.
  • Aluminum is particularly suitable as the material for the housing 28 with regard to mechanical strength.
  • Spacer elements 16 according to FIG. 1 or 3 can be mechanically connected, in particular screwed, to the base part 29 and / or the reinforcement ring 26 or the ring 27.
  • FIG. 10 shows a coupler in partial section along the line A-A according to FIG. 11.
  • an external primary circuit 1a and an internal secondary circuit 2a are arranged in such a way that a cylindrical air gap 11a results.
  • Each of the two core arrangements 4a has four legs 7a and 7b.
  • the legs 7a and 7b are formed on transformer sheets 20e, 20f.
  • the inner radius r of the secondary circle 2a is evidently smaller than the outer radius R.
  • spaces are formed on the end face of the legs 20f, which are filled in by rectangular additional sheet metal sections 20g. This ensures a tight packing of the sheets in the area of the air gap 11a.
  • Primary circuit 1a and secondary circuit 2a are arranged analogously to the exemplary embodiment according to FIG. 9 in housings 28a and 28b made of cast aluminum.
  • clamping arrangements (not shown) can, for. B. provide in a ring shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Pens And Brushes (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Surgical Instruments (AREA)
EP95810366A 1994-06-17 1995-06-02 Coupleur électromagnétique Withdrawn EP0688028A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH192994 1994-06-17
CH1929/94 1994-06-17

Publications (1)

Publication Number Publication Date
EP0688028A1 true EP0688028A1 (fr) 1995-12-20

Family

ID=4221895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810366A Withdrawn EP0688028A1 (fr) 1994-06-17 1995-06-02 Coupleur électromagnétique

Country Status (2)

Country Link
EP (1) EP0688028A1 (fr)
DE (1) DE29503608U1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775383A1 (fr) * 1998-02-25 1999-08-27 Siraga Sa Transformateur tournant comportant un corps fixe et un corps rotatif disposes l'un en face de l'autre
WO2002067276A1 (fr) * 2001-02-17 2002-08-29 Robert Bosch Gmbh Transformateur rotatif
WO2003065389A1 (fr) * 2002-01-30 2003-08-07 Aloys Wobben Transformateur
EP1772940A2 (fr) * 2005-10-04 2007-04-11 Prüftechnik Dieter Busch Ag Coupleur rotatif pour la transmission d'énergie électrique ou information
WO2010105764A1 (fr) * 2009-03-19 2010-09-23 Sew-Eurodrive Gmbh & Co. Kg Transmetteur de rotation et machine synchrone à excitation indépendante
WO2013167830A1 (fr) * 2012-05-10 2013-11-14 Hispano-Suiza Transformateur tournant triphase cuirasse magnetiquement a trois noyaux magnetiques
WO2013167829A1 (fr) * 2012-05-10 2013-11-14 Hispano-Suiza Transformateur tournant triphase-diphase
RU2528615C2 (ru) * 2008-04-14 2014-09-20 Акер Энджиниринг Энд Текнолоджи Ас Вращающийся трансформатор
RU2529004C2 (ru) * 2011-08-03 2014-09-27 Ритталь Гмбх Унд Ко. Кг Адаптер сборных шин с несущей шиной для закрепления коммутационного аппарата
CN104584155A (zh) * 2012-08-23 2015-04-29 伊斯帕诺-絮扎公司 包括斯科特接线的三相/两相旋转变压器
RU2562064C1 (ru) * 2014-05-07 2015-09-10 Закрытое Акционерное Общество "Научно-Производственное Объединение Всероссийский Электротехнический Институт-Электроизоляция" Вращающийся трансформатор
RU2631832C1 (ru) * 2016-04-21 2017-09-27 Евгений Николаевич Коптяев Трансформатор частоты
RU185167U1 (ru) * 2018-09-28 2018-11-23 Общество с ограниченной ответственностью "Научно-производственное предприятие "ИНВЕНТОР" (ООО "НПП "ИНВЕНТОР") Умножитель частоты

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2953321B1 (fr) * 2009-11-30 2012-02-24 Hispano Suiza Sa Transformateur tournant a installation facilitee
EP3680921A1 (fr) 2010-09-15 2020-07-15 Schleifring GmbH Transformateur de puissance rotatif
US10034361B2 (en) * 2016-02-15 2018-07-24 Smiths Detection, Llc Line-frequency rotary transformer for computed tomography gantry

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269786A1 (en) * 1974-05-03 1975-11-28 Arjona Vallet F Ring core made from radial laminations - with more iron at the outer than at the inner diameter
DE2827386A1 (de) * 1978-06-22 1980-01-10 Garbe Lahmeyer & Co Ag Anordnung zur kontaktlosen uebertragung elektrischer wechselstromleistung auf ein umlaufendes maschinenteil
JPS60161603A (ja) * 1984-02-02 1985-08-23 Toshiba Corp 放射状鉄心
DE3537437A1 (de) * 1985-10-21 1987-04-23 Transformatoren Union Ag Drosselspule mit mindestens einem im querschnitt kreisfoermigen eisenkern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269786A1 (en) * 1974-05-03 1975-11-28 Arjona Vallet F Ring core made from radial laminations - with more iron at the outer than at the inner diameter
DE2827386A1 (de) * 1978-06-22 1980-01-10 Garbe Lahmeyer & Co Ag Anordnung zur kontaktlosen uebertragung elektrischer wechselstromleistung auf ein umlaufendes maschinenteil
JPS60161603A (ja) * 1984-02-02 1985-08-23 Toshiba Corp 放射状鉄心
DE3537437A1 (de) * 1985-10-21 1987-04-23 Transformatoren Union Ag Drosselspule mit mindestens einem im querschnitt kreisfoermigen eisenkern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 328 (E - 369) 24 December 1985 (1985-12-24) *

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775383A1 (fr) * 1998-02-25 1999-08-27 Siraga Sa Transformateur tournant comportant un corps fixe et un corps rotatif disposes l'un en face de l'autre
US6995485B2 (en) 2001-02-17 2006-02-07 Robert Bosch Gmbh Rotary transformer
WO2002067276A1 (fr) * 2001-02-17 2002-08-29 Robert Bosch Gmbh Transformateur rotatif
CN1320568C (zh) * 2002-01-30 2007-06-06 艾劳埃斯·乌本 变压器
AU2003202584B2 (en) * 2002-01-30 2006-06-15 Aloys Wobben Translator
KR100727294B1 (ko) * 2002-01-30 2007-06-12 알로이즈 우벤 변환기
US7605681B2 (en) 2002-01-30 2009-10-20 Aloys Wobben Transformer
WO2003065389A1 (fr) * 2002-01-30 2003-08-07 Aloys Wobben Transformateur
EP1772940A2 (fr) * 2005-10-04 2007-04-11 Prüftechnik Dieter Busch Ag Coupleur rotatif pour la transmission d'énergie électrique ou information
EP1772940A3 (fr) * 2005-10-04 2011-05-18 Prüftechnik Dieter Busch AG Coupleur rotatif pour la transmission d'énergie électrique ou information
RU2528615C2 (ru) * 2008-04-14 2014-09-20 Акер Энджиниринг Энд Текнолоджи Ас Вращающийся трансформатор
WO2010105764A1 (fr) * 2009-03-19 2010-09-23 Sew-Eurodrive Gmbh & Co. Kg Transmetteur de rotation et machine synchrone à excitation indépendante
RU2529004C2 (ru) * 2011-08-03 2014-09-27 Ритталь Гмбх Унд Ко. Кг Адаптер сборных шин с несущей шиной для закрепления коммутационного аппарата
WO2013167829A1 (fr) * 2012-05-10 2013-11-14 Hispano-Suiza Transformateur tournant triphase-diphase
US9178442B2 (en) 2012-05-10 2015-11-03 Labinal Power Systems Three-phase/two-phase rotary transformer
FR2990559A1 (fr) * 2012-05-10 2013-11-15 Hispano Suiza Sa Transformateur tournant triphase cuirasse magnetiquement a trois noyaux magnetiques
WO2013167830A1 (fr) * 2012-05-10 2013-11-14 Hispano-Suiza Transformateur tournant triphase cuirasse magnetiquement a trois noyaux magnetiques
CN104488047A (zh) * 2012-05-10 2015-04-01 雷比诺电力系统 三相/双相旋转变压器
RU2630477C2 (ru) * 2012-05-10 2017-09-11 Лабиналь Пауэр Системз Магнитно-экранированный трехфазный вращающийся трансформатор, имеющий три магнитных сердечника
RU2629962C2 (ru) * 2012-05-10 2017-09-05 Лабиналь Пауэр Системз Трехфазно-двухфазный вращающийся траснформатор
FR2990558A1 (fr) * 2012-05-10 2013-11-15 Hispano Suiza Sa Transformateur tournant triphase-diphase
US9424978B2 (en) 2012-05-10 2016-08-23 Labinal Power Systems Magnetically shielded three phase rotary transformer having three magnetic cores
CN104584155B (zh) * 2012-08-23 2017-05-03 雷比诺电力系统 包括斯科特接线的三相/两相旋转变压器
CN104584155A (zh) * 2012-08-23 2015-04-29 伊斯帕诺-絮扎公司 包括斯科特接线的三相/两相旋转变压器
RU2562064C1 (ru) * 2014-05-07 2015-09-10 Закрытое Акционерное Общество "Научно-Производственное Объединение Всероссийский Электротехнический Институт-Электроизоляция" Вращающийся трансформатор
RU2631832C1 (ru) * 2016-04-21 2017-09-27 Евгений Николаевич Коптяев Трансформатор частоты
RU185167U1 (ru) * 2018-09-28 2018-11-23 Общество с ограниченной ответственностью "Научно-производственное предприятие "ИНВЕНТОР" (ООО "НПП "ИНВЕНТОР") Умножитель частоты

Also Published As

Publication number Publication date
DE29503608U1 (de) 1995-09-14

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