EP0382307A2 - Dispositif d'alimentation de puissance à commutation - Google Patents

Dispositif d'alimentation de puissance à commutation Download PDF

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Publication number
EP0382307A2
EP0382307A2 EP90200258A EP90200258A EP0382307A2 EP 0382307 A2 EP0382307 A2 EP 0382307A2 EP 90200258 A EP90200258 A EP 90200258A EP 90200258 A EP90200258 A EP 90200258A EP 0382307 A2 EP0382307 A2 EP 0382307A2
Authority
EP
European Patent Office
Prior art keywords
power supply
supply device
winding
choke
transducer
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Withdrawn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
EP90200258A
Other languages
German (de)
English (en)
Other versions
EP0382307A3 (fr
Inventor
Burghard Dipl.-Ing. Krahl
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0382307A2 publication Critical patent/EP0382307A2/fr
Publication of EP0382307A3 publication Critical patent/EP0382307A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
    • G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/38—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only

Definitions

  • the invention relates to a clocked power supply device with a controllable switch in series with a primary winding of a transformer and with at least one secondary circuit with a transducer choke connected to a regulator.
  • a clocked power supply device is known with a switching element which is arranged in series with a primary winding, one Saturation choke is connected in series with a secondary winding of the transformer.
  • a control circuit controls a current of the saturation choke to keep a DC voltage occurring at the output terminals constant.
  • the saturation choke has a wound core made of amorphous metallic magnetic material, the band thickness of which is in the range from four to sixty micrometers.
  • the invention has for its object to provide a clocked power supply device of the type mentioned, which has a high stability of the output voltage and a precise and fast control behavior with respect to the magnetization of the transducer choke, especially at high switching frequency of the controllable switch (e.g. 100 kHz to 1 MHz).
  • transducer choke has a core made of ferrite material and in that the controller delivers a positive or negative control current for magnetizing the transducer choke.
  • FIG. 1 shows a clocked power supply device with a transformer Tr, which has a primary winding N0 and a secondary winding N1.
  • the transformer Tr translates voltage and current and galvanically isolates input and output.
  • In series with the primary winding N0 is e.g. arranged as a transistor, designed controllable switch S.
  • a capacitor C0 is connected in parallel with the input terminals at which the voltage U0 is present.
  • a power winding W1 of a transducer choke L0 and a rectifier diode D1 are arranged in series with the secondary winding N1.
  • a freewheeling diode D2 is connected in parallel with the series circuit comprising the secondary winding N1, power winding W1 and rectifier diode D1.
  • a series reactor L1 is arranged in series with the arrangement of secondary winding N1, power winding W1, rectifier diode D1 and free-wheeling diode D2.
  • a capacitor C1 is connected in parallel with the output terminals at which a voltage U1 occurs.
  • the control winding W2 of the transducer choke L0 is connected to the secondary winding N1 and to a regulator R, which supplies a regulating signal for regulating the voltage U1.
  • the rectifier diode D1 is conductive, the current flows after the transducer inductor L0 has been switched through to the load (not shown) and the storage inductor L1 absorbs energy, the freewheeling diode D2 being blocked.
  • the current flows from the storage inductor L1 through the freewheeling diode D2 into the load.
  • the regulator R is connected on the input side to the output terminals at which the voltage U1 is present. In this way, a control criterion is obtained, which is a corresponding control signal in the form of a control current with IS at the output of controller R.
  • the control current IS flowing to the control winding W2 of the transducer inductor L0 causes a change in the time in which the power winding W1 of the transducer inductor L0 blocks and thus regulates or stabilizes the voltage U1.
  • the transducer choke L0 has a power winding W1 and a control winding W2, which is connected to the regulator R and to the secondary winding N1.
  • the control winding W2 is advantageously connected to one side of the secondary winding N1.
  • the control winding W2 can lead both a positive control current IS for magnetization and a negative control current IS for demagnetization of the transducer choke L0 (FIG. 2).
  • the control winding W2 of the transducer choke advantageously has a higher number of turns than the power winding W1, since this leads to smaller control currents IS.
  • the transducer choke has further control windings and possibly further power windings.
  • the transducer choke L0 has only one winding which works both as a power winding and as a control winding.
  • the forward converter circuit in parallel with the series connection of the rectifier diode D1 and the storage inductor L1, has a dashed series connection comprising a further rectifier diode D3 and a resistor R.
  • This causes a current IN which demagnetizes the transducer choke.
  • the regulation then only takes place via the change in the positive control current IS.
  • Transductors chokes with cores made of amorphous material which have been used up to now, are suitable for switching frequencies of the controllable switch up to approximately 150 kHz, since the losses increase sharply at switching frequencies above 150 kHz.
  • ferrite cores are well suited for high switching frequencies above 150 kHz and are also considerably cheaper than amorphous cores.
  • FIG. 2 schematically shows a hysteresis curve of a transducer choke with a core made of ferrite material.
  • the magnetic induction B initially increases in accordance with the slope of the characteristic curve until saturation is reached. If the current through the transducer choke and thus the magnetic field strength H is again reduced to the value 0, the remanence point Br of the magnetic induction is set as the operating point.
  • the remanence point Br of a transducer choke with a core made of ferrite material is very low compared to a transducer choke with a core made of amorphous material. As a result, the transducer choke blocks a voltage time area corresponding to the induction stroke BR.
  • the control current IS of the controller R connected to the transducer choke, in particular via the control winding W2 makes it possible to set further operating points on the hysteresis curve in such a way that they have a desired, usually smaller, induction stroke and thus block a smaller voltage time area.
  • a positive control current IS for magnetizing the transducer choke L0 can set an operating point 1 which has a smaller induction stroke BI and blocks a correspondingly smaller voltage time area.
  • an operating point 2 with a correspondingly larger induction stroke by means of a negative control current IS for demagnetizing the transducer choke L0.
  • a negative control current IS for demagnetizing the transducer choke L0.
  • the voltage U1 is then regulated only via a positive control current IS.
  • the clocked power supply device has at least one flyback converter circuit, a flyback converter circuit or a forward converter circuit being able to contain a controller designed as a main control loop for regulating the pulse width of the controllable switch S.
  • the controllable switch S is controlled by pulses, the width of which is modulated as a function of load fluctuations in one of the output voltages.
  • the measures described above make it possible to set any points on the hysteresis curve, in particular between the remanence point Br and the saturation induction, in particular in the case of single-ended converters but also in push-pull converters by the magnetization and / or demagnetization of the ferrite core of the transducer choke. Even at high switching frequencies of the controllable switch, for example above 150 kHz, this leads to a precise and fast control behavior of the magnetization of the transducer choke and thus to a high stability of the output voltage.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Dc-Dc Converters (AREA)
  • Control Of Electrical Variables (AREA)
  • Soft Magnetic Materials (AREA)
EP19900200258 1989-02-09 1990-02-05 Dispositif d'alimentation de puissance à commutation Withdrawn EP0382307A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3903763A DE3903763A1 (de) 1989-02-09 1989-02-09 Getaktete stromversorgungseinrichtung
DE3903763 1989-02-09

Publications (2)

Publication Number Publication Date
EP0382307A2 true EP0382307A2 (fr) 1990-08-16
EP0382307A3 EP0382307A3 (fr) 1990-11-14

Family

ID=6373669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900200258 Withdrawn EP0382307A3 (fr) 1989-02-09 1990-02-05 Dispositif d'alimentation de puissance à commutation

Country Status (3)

Country Link
EP (1) EP0382307A3 (fr)
JP (1) JPH02235118A (fr)
DE (1) DE3903763A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001921A1 (fr) * 1992-07-14 1994-01-20 Valor Electronics Inc. Convertisseur continu-continu
WO1995015609A1 (fr) * 1993-12-01 1995-06-08 Melcher Ag Convertisseur continu-continu pour basses tensions de sortie
WO2006087402A2 (fr) * 2005-02-15 2006-08-24 Universidad De Sevilla Procede de reglage en continu du rapport de tensions dans des transformateurs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443763A1 (fr) * 1978-12-08 1980-07-04 Philips Nv Alimentation a decoupage comportant plusieurs sorties
DE3221839A1 (de) * 1981-06-19 1983-03-17 Hitachi Metals, Ltd., Tokyo Sperrwandler
DE3209975A1 (de) * 1982-03-18 1983-09-29 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung zur steuerung der hoehe einer abzugebenden pulsierenden spannung, insbesondere in einem gleichspannungswandler
EP0255844A1 (fr) * 1986-08-08 1988-02-17 International Business Machines Corporation Sources d'alimentation comportant un amplificateur magnétique de régulation de la tension

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443763A1 (fr) * 1978-12-08 1980-07-04 Philips Nv Alimentation a decoupage comportant plusieurs sorties
DE3221839A1 (de) * 1981-06-19 1983-03-17 Hitachi Metals, Ltd., Tokyo Sperrwandler
DE3209975A1 (de) * 1982-03-18 1983-09-29 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung zur steuerung der hoehe einer abzugebenden pulsierenden spannung, insbesondere in einem gleichspannungswandler
EP0255844A1 (fr) * 1986-08-08 1988-02-17 International Business Machines Corporation Sources d'alimentation comportant un amplificateur magnétique de régulation de la tension

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001921A1 (fr) * 1992-07-14 1994-01-20 Valor Electronics Inc. Convertisseur continu-continu
WO1995015609A1 (fr) * 1993-12-01 1995-06-08 Melcher Ag Convertisseur continu-continu pour basses tensions de sortie
US5673183A (en) * 1993-12-01 1997-09-30 Melcher, Ag DC/DC converter for low output voltages
WO2006087402A2 (fr) * 2005-02-15 2006-08-24 Universidad De Sevilla Procede de reglage en continu du rapport de tensions dans des transformateurs
WO2006087402A3 (fr) * 2005-02-15 2006-11-02 Univ Sevilla Procede de reglage en continu du rapport de tensions dans des transformateurs
ES2277500A1 (es) * 2005-02-15 2007-07-01 Universidad De Sevilla Procedimiento de regulacion continua de la relacion de tensiones en transformadores.

Also Published As

Publication number Publication date
EP0382307A3 (fr) 1990-11-14
DE3903763A1 (de) 1990-08-16
JPH02235118A (ja) 1990-09-18

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