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EP0218142A2 - Dispositif transmetteur rotatif - Google Patents

Dispositif transmetteur rotatif Download PDF

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Publication number
EP0218142A2
EP0218142A2 EP86113105A EP86113105A EP0218142A2 EP 0218142 A2 EP0218142 A2 EP 0218142A2 EP 86113105 A EP86113105 A EP 86113105A EP 86113105 A EP86113105 A EP 86113105A EP 0218142 A2 EP0218142 A2 EP 0218142A2
Authority
EP
European Patent Office
Prior art keywords
stator
rotor
rotary transformer
rotary
poles
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.)
Granted
Application number
EP86113105A
Other languages
German (de)
English (en)
Other versions
EP0218142B1 (fr
EP0218142A3 (en
Inventor
Wolfgang Trautmann
Peter Häberlein
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.)
Institut Dr Friedrich Foerster Pruefgeraetebau GmbH and Co KG
Original Assignee
Institut Dr Friedrich Foerster Pruefgeraetebau GmbH and Co KG
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 Institut Dr Friedrich Foerster Pruefgeraetebau GmbH and Co KG filed Critical Institut Dr Friedrich Foerster Pruefgeraetebau GmbH and Co KG
Publication of EP0218142A2 publication Critical patent/EP0218142A2/fr
Publication of EP0218142A3 publication Critical patent/EP0218142A3/de
Application granted granted Critical
Publication of EP0218142B1 publication Critical patent/EP0218142B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices
    • 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

Definitions

  • the invention relates to a rotary transducer arrangement according to the preamble of claim 1.
  • Such an arrangement is used in particular in devices for non-destructive material testing in which the surface of rotationally symmetrical parts is scanned for errors by a rotating rotary head.
  • the rotary transducers of the arrangement establish the signal connection between the fixed and the rotating part of the rotating head.
  • an eddy current test device which contains a rotary transmitter arrangement with two rotary transmitters.
  • the stationary and the rotating parts are each arranged side by side in the axial direction.
  • Rotary transformers of this type have been in use for a long time and have proven themselves many times.
  • two disadvantages limit the possible uses of the known arrangements.
  • probes are often provided in one test head. Often, probes are used that each have an excitation and a receiver winding, i.e. they already require two rotary transmitters per probe. With only four such probes, eight rotary transmitters would already be necessary.
  • the invention has for its object to provide a rotary transformer arrangement of the type mentioned, which requires only a relatively small extension in the axial direction even with a larger number of rotary transmitters and which is also suitable for higher speeds.
  • a rotary transformer arrangement which is characterized in accordance with claim 1.
  • Such an arrangement is particularly advantageous for use in rotary head test devices in which a high test speed, that is to say a rapid throughput of the parts to be tested, is expected.
  • a high test speed is achieved on the one hand by the largest possible number of scanning probes, the spiral scanning paths of which are joined together, and on the other hand by the highest possible rotational speed of the rotating head.
  • the rotary transmitter arrangement according to the invention on the one hand the axial extension of the test device is not increased by a larger number of rotary transmitters used, on the other hand a higher rotational speed can be selected.
  • Advantageous embodiments of the invention can be found in the subclaims.
  • Figures 1 and 2 show two mutually perpendicular sections through a rotary transmitter arrangement 10 according to the invention with ten rotary transmitters 11, namely Figure 1 shows a section along a line II in Figure 2, Figure 2 shows a section along a line II-II in Figure 1.
  • the load-bearing Components of the rotary transducer arrangement 10 are a stator disk 12, which is fastened to a stator system 14, which is only indicated in a hint, and a rotor disk 16, which is fastened to a rotor system 18, which is also not shown in full.
  • the two systems are said to belong to a rotary head testing device, not shown here, in which the parts to be tested pass through the opening 20 in the middle of the two disks 12, 16.
  • stator and rotor disk 12, 16 are constructed identically in the present application example, so that one can be content with the description of the rotor disk 16.
  • Aluminum or another light metal is particularly suitable as a material for the panes.
  • Ten annular groove-shaped, concentric recesses 22 are embedded in the disks, the design of which can be better seen on an enlarged scale in FIG. 3.
  • the side walls of the recesses 22 run at an acute angle, so that the cross section of the recesses widens towards the groove base.
  • Rotor cores 24 and stator cores 26 with poles 28 are produced in the following way: Soft magnetic material is pressed into the recesses 22. That can e.g. B.
  • FIGS. 4 and 5 show a modified rotary transducer arrangement 110 with likewise ten rotary transducers 11.
  • a substantially enlarged passage opening results with the outer diameter remaining the same.
  • a reduction in the outer diameter could have been brought about even with the same passage opening.
  • 4 and 5 are again two mutually perpendicular cuts, namely in FIG. 4 a section along a line IV-IV in FIG. 5, in FIG. 5 a section along a line VV in FIG. 4.
  • a stator disk 112 is attached on one Stator system 114.
  • the stator disk 112 is opposed on each side by a rotor disk 116, each with five recesses 22.
  • the two rotor disks 116 are connected to one another by a tube 40 and are in a non-positive connection with a rotor system 118.
  • the rotary transducers 11 are constructed in the same way as that shown in FIG. 3: with the rotor core 24, stator core 26, poles 28 and winding 32 embedded between the latter.
  • the rotary transducers 11 can also be produced in the manner described above .
  • the disk 112 which is provided on both sides with recesses 22 and with rotary transmitter halves, can also be used as a rotor disk. In this case it would be connected to the rotor system, while the two disks 116 would be connected to the stator system.
  • FIGS. 8 and 9 again show a section of a stator or rotor disk 216, specifically in FIG. 8 in a top view of the surface 235 of the disk 216 and in FIG. 9 in a section along the line IX-IX.
  • soft magnetic material has been pressed into recesses 222 in the disc 216, so that magnetic cores 226 are formed in this way.
  • Flat annular grooves 230 are turned or milled out of these cores 226, the depth of which is shallow compared to the depth of a core 226 and each have circular bulges 218. Holes 219 are drilled through the washer 216 within the bulges 218 and are intended to serve for the passage of connecting wires.
  • Figures 6 and 7 show in plan view or in section along a line VII - VII two flat rings 232 made of insulating material, for. B. glass fiber reinforced epoxy resin, as is usually used for the production of printed circuit boards.
  • the underside (with reference to FIG. 6) of the rings 232 carries a spiral conductor line 234, which has been produced according to a known technique in the manner of the printed circuits and which can best be seen on the left ring 232 of FIG. 6.
  • the rings 232 serve as windings for the rotary transducers and for this purpose have connection ends 236 within widenings 238.
  • the rings 232 of the rotary transducers of the stator or rotor disk can each be produced from a printed circuit board according to a common layout, by using the latter separates the individual rings of different diameters.
  • the rings 232 are then inserted into the annular grooves 230 and glued there, as can be seen from FIG. 10.
  • the parts of the rear side of the rings 232 which protrude from the surface 235 of the stator or rotor disk 216 are finally removed by turning or milling, so that a smooth surface 235 is again formed, which can be attached very closely adjacent to a corresponding partner surface.
  • the groove 230 which contains the conductor track 234 representing the winding, can be designed to an extremely shallow depth according to the technique described.
  • windings can also be used in which a conductor track has been applied to a flexible thin film of insulating material.
  • the groove 230 in order to achieve the necessary mechanical strength, the groove 230 must be filled with synthetic resin and later turned off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
EP86113105A 1985-10-11 1986-09-24 Dispositif transmetteur rotatif Expired - Lifetime EP0218142B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3536292 1985-10-11
DE3536292 1985-10-11

Publications (3)

Publication Number Publication Date
EP0218142A2 true EP0218142A2 (fr) 1987-04-15
EP0218142A3 EP0218142A3 (en) 1989-04-12
EP0218142B1 EP0218142B1 (fr) 1991-01-09

Family

ID=6283348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113105A Expired - Lifetime EP0218142B1 (fr) 1985-10-11 1986-09-24 Dispositif transmetteur rotatif

Country Status (2)

Country Link
EP (1) EP0218142B1 (fr)
DE (1) DE3676772D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306791A (en) * 1995-10-30 1997-05-07 Daewoo Electronics Co Ltd Rotary transformer with flexible printed circuit boards
GB2398176A (en) * 2002-05-13 2004-08-11 Zap Wireless Technologies Ltd Electrical power transfer using inductive coupling
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
DE102005049924B4 (de) * 2004-10-28 2008-04-10 Pro-Micron Gmbh & Co. Kg Modular Systems Transpondersystem
US7525283B2 (en) 2002-05-13 2009-04-28 Access Business Group International Llc Contact-less power transfer
US7622891B2 (en) 2002-10-28 2009-11-24 Access Business Group International Llc Contact-less power transfer
EP1086898B2 (fr) † 1999-09-27 2010-03-10 G.D Societ Per Azioni Machine automatique munie d' une roue d' opreation a commande sans fil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA923207A (en) * 1971-01-04 1973-03-20 R. Gooch Beverley Interchannel shield for multichannel rotary transformer
US3900793A (en) * 1974-02-25 1975-08-19 Magnetic Analysis Corp Eddy current testing apparatus including a rotating head with probe and null circuit means mounted thereon including rotary transformer windings
DE2457670C3 (de) * 1974-12-06 1981-04-30 Institut Dr. Friedrich Förster Prüfgerätebau, 7410 Reutlingen Rotierkopf zum Abtasten einer Oberfläche mit mindestens einer Sonde zur zerstörungsfreien Werkstoffprüfung
DE2827386A1 (de) * 1978-06-22 1980-01-10 Garbe Lahmeyer & Co Ag Anordnung zur kontaktlosen uebertragung elektrischer wechselstromleistung auf ein umlaufendes maschinenteil
DE3465542D1 (en) * 1983-08-16 1987-09-24 Tdk Corp A rotary transformer

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306791A (en) * 1995-10-30 1997-05-07 Daewoo Electronics Co Ltd Rotary transformer with flexible printed circuit boards
US5764443A (en) * 1995-10-30 1998-06-09 Daewoo Electronics Co., Ltd. Rotary transformer with flexible printed circuit boards
EP1086898B2 (fr) † 1999-09-27 2010-03-10 G.D Societ Per Azioni Machine automatique munie d' une roue d' opreation a commande sans fil
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
GB2398176B (en) * 2002-05-13 2006-03-08 Zap Wireless Technologies Ltd Improvements relating to contact-less power transfer
US7525283B2 (en) 2002-05-13 2009-04-28 Access Business Group International Llc Contact-less power transfer
GB2398176A (en) * 2002-05-13 2004-08-11 Zap Wireless Technologies Ltd Electrical power transfer using inductive coupling
US7714537B2 (en) 2002-05-13 2010-05-11 Access Business Group International Llc Contact-less power transfer
US7863861B2 (en) 2002-05-13 2011-01-04 Access Business Group International Llc Contact-less power transfer
US7952324B2 (en) 2002-05-13 2011-05-31 Access Business Group International Llc Contact-less power transfer
US7622891B2 (en) 2002-10-28 2009-11-24 Access Business Group International Llc Contact-less power transfer
DE102005049924B4 (de) * 2004-10-28 2008-04-10 Pro-Micron Gmbh & Co. Kg Modular Systems Transpondersystem
DE102005049924B8 (de) * 2004-10-28 2008-07-24 Pro-Micron Gmbh & Co. Kg Modular Systems Transpondersystem

Also Published As

Publication number Publication date
EP0218142B1 (fr) 1991-01-09
DE3676772D1 (de) 1991-02-14
EP0218142A3 (en) 1989-04-12

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