EP0705528B1 - Hochspannungsgenerator - Google Patents

Hochspannungsgenerator Download PDF

Info

Publication number
EP0705528B1
EP0705528B1 EP94920496A EP94920496A EP0705528B1 EP 0705528 B1 EP0705528 B1 EP 0705528B1 EP 94920496 A EP94920496 A EP 94920496A EP 94920496 A EP94920496 A EP 94920496A EP 0705528 B1 EP0705528 B1 EP 0705528B1
Authority
EP
European Patent Office
Prior art keywords
circuit
primary
transformer
voltage generator
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.)
Expired - Lifetime
Application number
EP94920496A
Other languages
English (en)
French (fr)
Other versions
EP0705528A1 (de
Inventor
Gilbert Dauge
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.)
Moulinex SA
Original Assignee
Moulinex SA
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 Moulinex SA filed Critical Moulinex SA
Publication of EP0705528A1 publication Critical patent/EP0705528A1/de
Application granted granted Critical
Publication of EP0705528B1 publication Critical patent/EP0705528B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/666—Safety circuits

Definitions

  • the present invention relates to a generator high voltage intended to supply at least a payload of the unidirectional type such that, for example, a magnetron or an electron tube and comprising a step-up transformer comprising a primary stage connected to a primary circuit, and a secondary stage having a winding connected to a secondary circuit comprising the load of use, said primary circuit being connected to an energy source electric and comprising electronic switching means so as to supply said transformer with high frequency current.
  • the primary stage of the transformer comprises first and second windings, mounted in a serial link having an intermediate socket and two end sockets, the primary circuit being connected directly to the intermediate socket.
  • the object of the present invention is the realization of a transformer of a reduced price, which is perfectly suited for use in a generator high voltage for microwave oven and susceptible mass production.
  • the primary circuit is connected to one of the two end taps via said switching means, a capacity connecting the two end sockets so as to produce, with the first and second windings, an oscillating circuit.
  • the generator uses a transformer series resonance whose operation is particularly suitable for a primary circuit comprising means switches consisting of IGBT type switches (Anglo-Saxon initials set for "Insulated Gate Bipolar Transistor ”) or MCT (Anglo-Saxon initials set for "Multiple Collector Transistor).
  • IGBT type switches Anglo-Saxon initials set for "Insulated Gate Bipolar Transistor ”
  • MCT Anglo-Saxon initials set for "Multiple Collector Transistor
  • the high-voltage generator is intended for supplying one or possibly several loads of the unidirectional type such as, for example, a microwave oven magnetron or an electronic tube, and comprises a step-up transformer comprising, as we can see in Figure 1, a primary stage E 1 connected to a primary circuit CP and a secondary stage E 2 having a winding L 3 connected to a secondary circuit S 0 , S 1 comprising the load of use, said circuit primary CP connecting the primary stage E 1 of the transformer T to a source of electrical energy B 0 , B i and comprising switching means K so as to supply the transformer T with high frequency current.
  • a step-up transformer comprising, as we can see in Figure 1, a primary stage E 1 connected to a primary circuit CP and a secondary stage E 2 having a winding L 3 connected to a secondary circuit S 0 , S 1 comprising the load of use, said circuit primary CP connecting the primary stage E 1 of the transformer T to a source of electrical energy B 0 , B i and comprising switching
  • a series resonance transformer i.e. a transformer with self leakage inductance on a capacity, generally presents itself as an element of type inductive for low frequencies and resonant type when the frequency rises.
  • Such an element results from the association of a perfect transformer TP, with a self-inductance L and a capacity C.
  • the primary stage E 1 of the transformer T comprises a first and a second winding L 1 , L 2 , the primary circuit being connected on the one hand to the first winding L 1 and, on the other hand, by l intermediary of a capacity C, at the second winding L 2 , said second winding L 2 being mounted in series with the first winding L 1 at the terminals of the capacity C, so as to produce an oscillating circuit.
  • a transformer having a primary winding provided with an intermediate socket PI and a socket at each end.
  • the primary circuit connects an end socket and the intermediate socket PI to the energy source B 0 , B 1 and the two end sockets are connected together by the capacitor C.
  • the inductances of the two windings L 1 and L 2 constituted respectively by the winding on either side of the intermediate tap, are in series in the oscillating circuit which includes the capacity C.
  • the high frequency resonant transformer series incorporates the self L and the transformer TP on the same magnetic circuit and thanks to a particular geometrical arrangement of the windings on the magnetic circuit is carried out between the windings couplings adapted to the operation of the load of use likely to be powered.
  • Such a transformer consists of three coil carcasses assembled and remains particularly expensive, especially in a mass production application.
  • FIGS. 2 and 3 which are embodiments of transformers according to the invention show a transformer T consisting of a ferrite 1, a carcass 2 comprising coils 3, 4 and 5 carrying the so-called primary windings L 1 and L 2 and a secondary winding L 3 .
  • An arrangement of the windings L 1 and L 2 in an embodiment as shown schematically in Figure 2 results in a relatively weak coupling between the windings L 1 and L 2 .
  • the two windings of the primary stage have a mutual coupling coefficient, or degree of coupling, between 0.5 and 0.7 and have values of substantially equal self-inductance. With such values of the coupling coefficient, we reach a coefficient effective coupling of the order of 0.9.
  • the secondary circuit including a load of use can be realized according to several variants. Two particularly interesting versions for feeding a magnetron are illustrated in Figures 5 and 6.
  • the secondary circuit comprises rectifying means.
  • the use load U has two supply terminals M 1 , M 2 connected, on the one hand, to a first terminal N 1 of the secondary winding L 3 , respectively by two diodes D 1 and D 2 polarized so opposite to each other, and, on the other hand, to a second terminal N 2 of the secondary winding L 3 respectively by two capacitors C 1 and C 2 .
  • the circuit comprises a magnetron M directly connected to the terminals of the secondary winding L 3 and a filtering capacity connected in parallel to the terminals of the magnetron.
  • the capacitor Cf represented in FIG. 6 and which is connected in parallel to the magnetron M in fact represents the association of several capacitors, in particular of filtering capacitors and of capacitors internal to the magnetron.

Claims (7)

  1. Hochspannungsgenerator, der zur Versorgung wenigstens einer Nutzlast vom unidirektionalen Typ wie beispielsweise eines Magnetrons oder einer Elektronenröhre bestimmt ist und einen Aufwärtstransformator (T) mit einer mit einem Primärkreis (CP) verbundenen Primärstufe (E1) und einer Sekundärstufe (E2) aufweist, die eine Wicklung (L3) umfaßt, die mit einem Sekundärkreis (S0, S1) verbunden ist, der die Nutzlast aufweist, wobei der Primärkreis (CP) die Primärstufe (E1) des Transformators (T) mit einer elektrischen Energiequelle (B0, B1) verbindet und Umschaltmittel (K) aufweist, so daß der Transformator mit einem hochfrequenten Strom versorgt wird, wobei die Primärstufe (E1) des Transformators (T) eine erste und eine zweite Wicklung (L1, L2) aufweist, die in Reihe geschaltet sind und einen Zwischenabgriff (Pl) und zwei Endabgriffe aufweisen, wobei der Primärkreis (CP) direkt mit dem Zwischenabgriff verbunden ist, dadurch gekennzeichnet, daß der Primärkreis andererseits über die Umschaltmittel (K) mit einem der beiden Endabgriffe verbunden ist, und daß eine Kapazität (C) die beiden Endabgriffe derart verbindet, daß mit der ersten und der zweiten Wicklung ein Schwingkreis gebildet wird.
  2. Hochspannungsgenerator nach Anspruch 1,
    dadurch gekennzeichnet, daß die beiden Wicklungen der Primärstufe einen Kopplungskoeffizienten zwischen 0,5 und 0,7 besitzen und im wesentlichen gleiche Selbstinduktionswerte aufweisen.
  3. Hochspannungsgenerator nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß die beiden Wicklungen der Primärstufe und der Sekundärstufe auf einem einzigen Gestell hergestellt sind.
  4. Hochspannungsgenerator nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß der Sekundärkreis außerdem Gleichrichtungsmittel aufweist.
  5. Hochspannungsgenerator nach Anspruch 4,
    dadurch gekennzeichnet, daß die Nutzlast (U) zwei Versorgungsanschlüsse (M1, M2) aufweist, die einerseits über zwei Gleichrichterdioden (D1, D2), die einander entgegengesetzt polarisiert sind, mit einem ersten Anschluß (N1) der Sekundärwicklung (L3) und andererseits über zwei Kapazitäten (C1, C2) mit einem zweiten Anschluß (N2) der Sekundärwicklung (L3) verbunden sind.
  6. Hochspannungsgenerator nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, daß der Sekundärkreis eine Filterkapazität aufweist, die parallel zu den Anschlüssen eines Magnetrons angeschlossen ist.
  7. Hochspannungsgenerator nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß die Umschaltmittel Umschalter vom Typ IGBT oder MCT sind.
EP94920496A 1993-06-22 1994-06-21 Hochspannungsgenerator Expired - Lifetime EP0705528B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9307565 1993-06-22
FR9307565A FR2707052B1 (de) 1993-06-22 1993-06-22
PCT/FR1994/000748 WO1995001083A1 (fr) 1993-06-22 1994-06-21 Generateur de haute tension

Publications (2)

Publication Number Publication Date
EP0705528A1 EP0705528A1 (de) 1996-04-10
EP0705528B1 true EP0705528B1 (de) 1998-02-11

Family

ID=9448419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94920496A Expired - Lifetime EP0705528B1 (de) 1993-06-22 1994-06-21 Hochspannungsgenerator

Country Status (4)

Country Link
EP (1) EP0705528B1 (de)
DE (1) DE69408535T2 (de)
FR (1) FR2707052B1 (de)
WO (1) WO1995001083A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020071126A (ko) * 2001-03-03 2002-09-12 주식회사 테크노.티 인터넷상에서 전송된 영상을 입체로 볼 수 있도록 한 시스템

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2180442A1 (de) * 1972-04-17 1973-11-30 Tibbs Christopher
JPS6049554A (ja) * 1983-08-30 1985-03-18 Mitsubishi Electric Corp マイクロ波放電光源装置用電源装置
JPS61259488A (ja) * 1985-05-14 1986-11-17 松下電器産業株式会社 高周波加熱装置
EP0280100B1 (de) * 1987-02-10 1995-05-10 Matsushita Electric Industrial Co., Ltd. Hochfrequenz-Heizapparat
US4747034A (en) * 1987-03-05 1988-05-24 David V. Dickey High efficiency battery adapter
JPH01313884A (ja) * 1988-06-13 1989-12-19 Sharp Corp 高周波加熱装置
US4882666A (en) * 1989-03-23 1989-11-21 North American Philips Corporation High frequency high voltage power supply with controlled output power
JPH03295189A (ja) * 1990-03-28 1991-12-26 Sharp Corp インバータ電子レンジの駆動回路

Also Published As

Publication number Publication date
EP0705528A1 (de) 1996-04-10
DE69408535T2 (de) 1998-07-30
FR2707052B1 (de) 1996-10-11
FR2707052A1 (de) 1994-12-30
WO1995001083A1 (fr) 1995-01-05
DE69408535D1 (de) 1998-03-19

Similar Documents

Publication Publication Date Title
FR2839189A1 (fr) Transformateur de faible encombrement
EP0267822A1 (de) Hochfrequenztransformator mit gedruckter Schaltungswicklung, insbesondere für sehr hohe Spannungsquelle
FR2627644A1 (fr) Convertisseur continu-continu, sans pertes de commutation, notamment pour alimentation continue haute frequence ou pour amplificateur a tube a ondes progressives
EP0705528B1 (de) Hochspannungsgenerator
EP1929630B1 (de) Strikte steuerung elektrischer stromumsetzer
US3701055A (en) Ka-band solid-state switching circuit
FR2858911A1 (fr) Circuit d'eclairage a lampe a decharge a detection de courant ou de tension
EP1063870B1 (de) Fortbildung von Zündübertragern für Entladungslampen in Kraftfahrzeugscheinwerfern
RU2072623C1 (ru) Умножитель частоты
WO2020115402A1 (fr) Dispositif d'induction electromagnetique
FR3050069A1 (fr) Composant magnetique, circuit electrique resonant, convertisseur electrique et systeme electrique
FR3009885A3 (de)
FR2730108A1 (fr) Dispositif de commutation d'un circuit de haute tension a transformateur d'impulsion
FR2607618A1 (fr) Transformateur de retour de spot perfectionne et dispositif de visualisation a tube a rayons cathodiques muni d'un tel transformateur
WO2017140674A1 (fr) Composant magnétique, circuit electrique resonant, convertisseur electrique et systeme electrique
EP0645886B1 (de) Hochenergiezündgenerator insbesondere für eine Gasturbine
FR2858910A1 (fr) Circuit d'eclairage a lampe a decharge a convertisseur continu-alternatif
US20230343504A1 (en) Improved performance of converter
FR2565399A1 (fr) Transformateur a fort couplage primaire-secondaire
FR2730342A1 (fr) Transformateur electrique, en particulier pour circuit d'alimentation a resonance, et circuit equipe d'un tel transformateur
FR3112886A1 (fr) Ensemble comprenant au moins une première et une deuxième inductance
FR2688356A1 (fr) Limiteur de courant par inductance serie a circuit magnetique muni d'une gaine supraconductrice.
FR2858907A1 (fr) Circuit d'eclairage a lampe a decharge
EP0576356B1 (de) Schaltung für Fehlerstromschutzschalter
FR3105637A1 (fr) Filtrage d'une charge dans une architecture electrique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19951213

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE GB IT NL

17Q First examination report despatched

Effective date: 19960530

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE GB IT NL

ITF It: translation for a ep patent filed

Owner name: FUMERO BREVETTI S.N.C.

REF Corresponds to:

Ref document number: 69408535

Country of ref document: DE

Date of ref document: 19980319

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980511

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010618

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010630

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010816

Year of fee payment: 8

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020621

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020625

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020630

BERE Be: lapsed

Owner name: S.A. *MOULINEX

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020621

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050621