EP0711450B1 - Transducteur planaire - Google Patents

Transducteur planaire Download PDF

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Publication number
EP0711450B1
EP0711450B1 EP94916901A EP94916901A EP0711450B1 EP 0711450 B1 EP0711450 B1 EP 0711450B1 EP 94916901 A EP94916901 A EP 94916901A EP 94916901 A EP94916901 A EP 94916901A EP 0711450 B1 EP0711450 B1 EP 0711450B1
Authority
EP
European Patent Office
Prior art keywords
transductor
section
planar
winding
primary winding
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.)
Expired - Lifetime
Application number
EP94916901A
Other languages
German (de)
English (en)
Other versions
EP0711450A1 (fr
Inventor
Friedhelm RÖMER
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.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf International GmbH
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 Wincor Nixdorf International GmbH filed Critical Wincor Nixdorf International GmbH
Publication of EP0711450A1 publication Critical patent/EP0711450A1/fr
Application granted granted Critical
Publication of EP0711450B1 publication Critical patent/EP0711450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F29/146—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Definitions

  • the arrangement relates to current flow control with transducers, especially in switching power supplies.
  • Switched-mode power supplies are used extensively in tasks that require large output currents at low voltages, for example in power supplies for high-performance computers. This usually requires several voltages on the secondary side. For this, several output windings are used, which are rectified separately. A primary-side regulation cannot compensate for load differences at the different output voltages, so that an additional secondary regulation is necessary.
  • transducers i.e. coils controlled in magnetic saturation, has proven itself for this purpose.
  • the object of the invention is to provide arrangements which achieve transducers for currents up to 300 A in the low-voltage range with little effort, with low leakage inductance and easy manufacture.
  • control winding can be wound in layers.
  • FIG. 1 shows a section through a one-piece core 10 made of highly permeable material with low eddy current losses, for example a ferrite.
  • This core has the shape of a cuboid, which has a cuboid opening 12 and thus has a closed iron path with two legs 14a, 14b and the yokes 15a, 15b connecting them.
  • a primary winding 11a, 11b is placed around one leg 14a and a control winding 13 is applied to the other leg 14b.
  • the primary winding exists a metal profile which is as wide as the opening in the core and whose cross section is preferably approximately half the cross section of the opening.
  • the control winding 13 consists of one or more layers of insulated wire.
  • the primary winding 11a, 11b is a U-shaped bent or screwed flat profile made of copper or aluminum, over which a prepared core set, already provided with the control winding, is pushed during assembly.
  • the flat profile is then screwed directly onto the rectifier connections (not shown) and the control winding 13 is connected.
  • the core set is made beforehand from one or more cores, which are strung together so that their openings are aligned. After a temporary fixation, for example with adhesive tape, the control winding can be applied. The fixation can remain on the cores after assembly.
  • a band braided from copper braid can also be used, as is known, for example, for the electrical connection of the door and housing as a ground band.
  • the planar transducer is preferably used as a transducer for regulating the output voltage on the secondary side in the case of primary switched-mode switching power supplies according to FIG. 3.
  • These consist of a rectifier 30, a filter capacitor 31, a control circuit 32, an electronic switch 33 and a transformer 40 with primary winding 41 and secondary winding 42.
  • the primary winding 41 is supplied by the first control circuit 32 with a pulsed current which is rectified on the secondary side.
  • This form of switching power supplies preferably as a flow converter is generally known, which is why details of the execution, in particular also protective means, were dispensed with for the sake of clarity.
  • FIG. 3 A particularly advantageous arrangement for this case is shown in FIG. 3.
  • only one secondary winding is used on the part of the switching power supply, from which 5V and 3.3V are obtained simultaneously.
  • the secondary winding 42 consists of only one turn.
  • a second secondary winding would deteriorate the coefficient of performance due to the then considerably less favorable transformer 40.
  • the rectifier circuits for both output voltages are conventionally designed with rectifier diodes 43, 53, filter chokes 47, 57, diodes 44, 54 for taking over the filter choke current and filter capacitors 45, 55.
  • the planar transducer is in series with the secondary winding 42 and the rectifier diode 43.
  • the planar transducer is used in the self-saturating mode.
  • the current flowing through it builds up the magnetic field to saturation.
  • the inductance drops to a small value, which is referred to as stray or residual inductance. This value must be very small because with high load for the 3.3V output and with low load at the 5V output only a small voltage difference of less than 1V between points A and B is permissible.
  • control circuit 46 uses the output voltage to be regulated as a reference variable.
  • control via a control current for demagnetization is necessary, as described.
  • demagnetization can be achieved by idling the control winding. Both known forms of control can be used with the invention.
  • the necessary magnetic flux numbers can be achieved with a u-shaped winding made of a copper profile with low leakage inductance.
  • the use of the transducer according to the invention allows the use of a common winding in switched-mode power supplies despite the small voltage difference.
  • a prerequisite for this is a low leakage inductance of the transducer.
  • the leakage inductance is the residual inductance with a saturated core. For the specified range of 300A, this could not be achieved with conventional designs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)
  • Vehicle Body Suspensions (AREA)
  • Amplifiers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Liquid Crystal (AREA)
  • Photoreceptors In Electrophotography (AREA)

Claims (6)

  1. Transducteur planaire comportant un enroulement primaire (11a, 11b) et un enroulement secondaire (13) commandant celui-ci, comportant
    - un noyau (10) d'une seule pièce, qui est parallélépipédique avec un trou (12) rectangulaire en section transversale, par lequel passent l'enroulement primaire et l'enroulement secondaire,
    - l'enroulement primaire étant sous forme de profilé métallique de section transversale rectangulaire, et
    - le profilé métallique étant sensiblement aussi large qu'une longueur de bord du trou.
  2. Transducteur planaire suivant la revendication 1, dans lequel l'enroulement primaire (11a, 11b) est en forme de U, de telle sorte que le retour (11a) se trouvant à l'extérieur soit parallèle à la partie intérieure (llb) à une faible distance.
  3. Transducteur planaire suivant la revendication 1 ou 2, dans lequel le noyau est formé par mise en file de plusieurs des noyaux d'une seule pièce, de forme parallélépipédique et à trou rectangulaire, de telle sorte que les trous soient alignés.
  4. Utilisation d'un transducteur planaire suivant l'une des revendications 1 à 3 dans un convertisseur de commutation directe.
  5. Utilisation suivant la revendication 4, dans laquelle au moins deux tensions de sortie de peu différentes sont obtenues à partir d'une unique sortie commune du convertisseur de commutation et au moins l'une des deux tensions de sortie est réduite et est réglée par le transducteur.
  6. Utilisation suivant la revendication 5, dans laquelle la différence de tension nominale est plus petite que 2 V.
EP94916901A 1993-07-26 1994-06-10 Transducteur planaire Expired - Lifetime EP0711450B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4325056A DE4325056C1 (de) 1993-07-26 1993-07-26 Planar-Transduktor
DE4325056 1993-07-26
PCT/DE1994/000654 WO1995003617A1 (fr) 1993-07-26 1994-06-10 Transducteur planaire

Publications (2)

Publication Number Publication Date
EP0711450A1 EP0711450A1 (fr) 1996-05-15
EP0711450B1 true EP0711450B1 (fr) 1997-01-22

Family

ID=6493742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916901A Expired - Lifetime EP0711450B1 (fr) 1993-07-26 1994-06-10 Transducteur planaire

Country Status (6)

Country Link
US (1) US5726618A (fr)
EP (1) EP0711450B1 (fr)
AT (1) ATE148258T1 (fr)
DE (2) DE4325056C1 (fr)
DK (1) DK0711450T3 (fr)
WO (1) WO1995003617A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6598084B2 (ja) * 2017-02-22 2019-10-30 株式会社オートネットワーク技術研究所 コイル、及びリアクトル

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE285431C (fr) *
GB618398A (en) * 1946-11-04 1949-02-21 Gen Electric Co Ltd Improvements in or relating to variable impedance reactors
FR1008194A (fr) * 1950-01-10 1952-05-14 Procédé de variation de la réluctance d'un circuit magnétique, dispositifs permettant la mise en oeuvre de ce procédé et leurs applications
FR1068736A (fr) * 1951-08-01 1954-06-30 Int Standard Electric Corp Dispositifs magnétiques de commande de circuits électriques en courants alternatifs
US2690536A (en) * 1952-03-01 1954-09-28 Bendix Aviat Corp Saturable magnetic device
GB735304A (en) * 1952-05-13 1955-08-17 Raoul Willheim Improvements in or relating to saturable reactors
US3916286A (en) * 1974-09-19 1975-10-28 United Technologies Corp Switching power supply common output filter
DE2544574A1 (de) * 1975-10-04 1977-04-07 Bbc Brown Boveri & Cie Getaktetes netzgeraet mit mehreren ausgaengen
FR2468983A1 (fr) * 1979-09-27 1981-05-08 Sobiepanek Janusz Transformateur reglable a variation de flux
DE3312124A1 (de) * 1983-04-02 1984-10-04 Schuntermann und Benninghoven, 4010 Hilden Transduktorgeregelter spannungskonstanthalter
DE3433973A1 (de) * 1984-06-29 1986-03-20 Vogt electronic AG, 8391 Erlau Verwendung eines hochaussteuerbaren ferrits mit niedriger permeabilitaet
DE3508327A1 (de) * 1985-03-06 1986-09-11 Siemens AG, 1000 Berlin und 8000 München Stromwandler mit einem rechteckigen eisenkern
DE3843183A1 (de) * 1988-12-22 1990-07-05 Philips Patentverwaltung Getaktete stromversorgungseinrichtung
DD285431A5 (de) * 1989-06-28 1990-12-12 Akad Wissenschaften Ddr Anordnung mit steuerbarem magnetischem fluss
DE4118918A1 (de) * 1991-06-08 1992-12-10 Philips Patentverwaltung Gleichspannungswandler

Also Published As

Publication number Publication date
DK0711450T3 (da) 1997-07-28
US5726618A (en) 1998-03-10
WO1995003617A1 (fr) 1995-02-02
DE4325056C1 (de) 1995-01-12
EP0711450A1 (fr) 1996-05-15
DE59401671D1 (de) 1997-03-06
ATE148258T1 (de) 1997-02-15

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