EP2852250B1 - Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension - Google Patents

Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension Download PDF

Info

Publication number
EP2852250B1
EP2852250B1 EP14001471.3A EP14001471A EP2852250B1 EP 2852250 B1 EP2852250 B1 EP 2852250B1 EP 14001471 A EP14001471 A EP 14001471A EP 2852250 B1 EP2852250 B1 EP 2852250B1
Authority
EP
European Patent Office
Prior art keywords
push
switching element
pull amplifier
operating mode
microwave oven
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.)
Active
Application number
EP14001471.3A
Other languages
German (de)
English (en)
Other versions
EP2852250A1 (fr
Inventor
Alfred Betschart
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.)
V-Zug AG
Original Assignee
V-Zug AG
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 V-Zug AG filed Critical V-Zug AG
Priority to PL14001471T priority Critical patent/PL2852250T3/pl
Priority to DK14001471.3T priority patent/DK2852250T3/en
Priority to SI201430270T priority patent/SI2852250T1/sl
Priority to EP14001471.3A priority patent/EP2852250B1/fr
Publication of EP2852250A1 publication Critical patent/EP2852250A1/fr
Application granted granted Critical
Publication of EP2852250B1 publication Critical patent/EP2852250B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H05B6/68—Circuits for monitoring or control
    • H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron
    • 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 invention relates to a microwave oven with a magnetron and with a drive circuit for the magnetron.
  • the invention also relates to a method for operating such a microwave oven.
  • a microwave oven has a high voltage transformer which is driven by a half or full bridge circuit.
  • the drive circuit of the magnetron in a conventional manner has a high voltage generator for generating the high voltage for the operation of the magnetron.
  • a controller is provided which controls the high voltage generator.
  • the high voltage generator has a high voltage transformer and a full bridge.
  • the full bridge has a first and a second push-pull final stage.
  • the push-pull output stages are connected in parallel with each other, and each push-pull output stage has a first switching element in series with a second switching element.
  • the primary winding of the high-voltage transformer is arranged between the two push-pull output stages.
  • controller is configured to switch between the operating modes A and A '.
  • This embodiment is based on the finding that the main losses occur in that switching element which is turned off first, and that it is possible to switch between the aforementioned operating modes A and A 'in order to reduce the losses between the first switching element of the first push-pull final stage and the second Balancing switching element of the second push-pull final stage.
  • the controller is configured to switch back and forth between the operation modes B and B '.
  • the switching back and forth between the operating modes is preferably carried out periodically.
  • the said operating modes A, A ', B and B' can be linked together by the controller being designed to combine the operating mode A with the operating mode B 'and to combine the operating mode A' with the operating mode B.
  • the control itself has only two different operating modes: In one of them, the switching elements are operated according to A and B, in the other according to A 'and B'.
  • control is advantageously designed to use the operating modes A and A 'alternately during the same period of time.
  • the invention also relates to a method for operating such a microwave oven, wherein in an operating mode A, the first switching element of the first push-pull output stage is turned off, while the second switching element of the second push-pull final stage is still turned on, and in an operating mode A 'the second switching element of the second push-pull output stage is switched off while the first switching element of the first push-pull final stage is still switched on, wherein between the operating modes A and A 'is changed.
  • high voltage is understood to mean a voltage which is required as anode-cathode voltage for operation of the magnetron. In practice, this voltage is in most cases at least 1 kV, usually several kilovolts.
  • a push-pull output stage is a series connection of two electronic components, which can be alternately switched continuously, so that at the center tap of the two components, a time-varying voltage.
  • a half-bridge circuit is a circuit with exactly one push-pull final stage.
  • a full-bridge circuit (H-circuit, H-bridge) is a circuit with two push-pull output stages connected in parallel, with the load between the center taps of the two push-pull final stages.
  • the invention relates to a microwave oven, as exemplified in Fig. 1 is shown.
  • the microwave oven has a cooking chamber 1 for receiving the food to be heated, which can be closed to the user by a user door 2.
  • a magnetron 3 is also arranged, which is connected via a Holleiter 4 with the cooking chamber 1 in combination.
  • a controller 5 controls the function of the device.
  • Fig. 2 shows the most important components of the controller 5 in the present context.
  • the mains voltage of e.g. 230 volts at 50 Hz is rectified in a rectifier 10.
  • the first intermediate voltage Uz thus produced is then slightly filtered via a first capacitor C1, the capacitor C1, however, being dimensioned so that, under load, the value of the first intermediate voltage Uz varies by at least 50% with twice the mains frequency.
  • the intermediate voltage Uz is also tapped via a diode D1 and further filtered via a second capacitor C2 to form a second intermediate voltage Uz '.
  • the first intermediate voltage Uz is supplied to a high voltage generator 11, with which, as described below, the high voltage for driving the magnetron 3 is generated.
  • the second intermediate voltage Uz ' is supplied to a heating current generator 12, with which, as described below, the heating current for the cathode heating of the magnetron 3 is generated.
  • control unit 13 e.g. in the form of a microprocessor, controlled.
  • An analog-to-digital converter of the control unit 13 is supplied via a voltage divider R5, R6 a proportional to the intermediate voltage Uz value so that it can determine the intermediate voltage Uz.
  • the high voltage generator 11 comprises a full bridge circuit with four electronic switching elements T3 - T6, in particular in the form of IGBT transistors. Over each switching element T3 - T6 a freewheeling diode 30 is arranged in each case. The freewheeling diode 30 is connected in parallel to the respective switching element and directed so that it only transmits current only when it flows in a direction reverse to the normal flow direction of the switching element.
  • the switching elements T3 - T6 are arranged in a known manner in two branches or push-pull output stages T3 and T4 or T5 and T6, wherein the switching elements of each branch are each arranged in series between the first intermediate voltage Uz and ground. Between the switching elements of each branch, a center tap is provided in each case, wherein the two center taps are connected to the two terminals of the primary winding of a high-voltage transformer 14.
  • the switching elements T3 - T6 form an inverter, which feeds an alternating voltage into the primary winding of the high-voltage transformer.
  • the high voltage transformer 14 has a secondary winding with a much higher number of turns than the primary winding for generating the high voltage.
  • the high voltage is rectified via two diodes D2 and D3, doubled and filtered by means of two capacitors C3 and C4.
  • the high voltage Uh thus generated is applied between the cathode K and the anode A of the magnetron 3.
  • a drive circuit 16 For driving the switching elements T3 - T6, a drive circuit 16 is provided, which is controlled by the control unit 13.
  • the drive circuit 16 generates the control voltages (gate or base voltages) UG3 - UG6 for the switching elements T3 - T6.
  • the control unit 13 is designed to switch the two branches of the full bridge circuit T3 - T6 alternately. The driving is done so that during a switching cycle, the primary winding of high voltage transformer 14 is not permanently between the first intermediate voltage Uz and ground, but that the primary winding is decoupled during a time to be selected by the control unit 13 from the intermediate voltage Uz, i. the circuit is clocked with pulse width modulation so that the value of the high voltage Uh can be controlled.
  • this can be divided by a voltage divider R10 - R13 and R14 and fed to an optocoupler 17 whose output signal is forwarded to the control unit 13. For example, a lack or non-ignition of the magnetron can be detected in this way.
  • a resistor R20 is provided between the two branches T3, T4 or T5, T6 and a fixed reference potential, in particular ground.
  • the initial increase in the voltage drop Ur across this resistor at the beginning of a current pulse is a measure of the anode current of the magnetron 3 and is supplied to the control unit 13 via an amplifier 18 for measurement purposes. In this way, the anode current can be monitored.
  • the Wienstromgenerator 12 is formed in the present embodiment of a half-bridge with two operated as push-pull final stage switching elements T1 and T2.
  • the switching elements T1 and T2 which in turn For example, can be configured as IGBT transistors and each equipped with a freewheeling diode 30 are arranged in series between the second intermediate voltage Uz 'and ground.
  • the center tap between the two switching elements T1, T2 is connected to one terminal of the primary winding of a heating transformer 15.
  • the second terminal of the primary winding of the heating transformer 15 is connected to the center tap of a capacitive voltage divider of two capacitors C5 and C6.
  • the two capacitors C5 and C6 are connected in series between the second intermediate voltage Uz 'and ground.
  • the diode D1 prevents current from being discharged from the capacitors C5, C6 when the high voltage generator 11 connected to the intermediate voltage Uz draws current.
  • the secondary winding of the heating transformer 15 is connected to the cathode heater, i. connected to the filament, the magnetron 3 and supplies them with electricity.
  • a drive circuit 20 For driving the switching elements T1 and T2, a drive circuit 20 is provided, which is controlled by the control unit 13.
  • the drive circuit 20 generates the control voltages (gate or base voltages) UG1, UG2 for the switching elements T1 and T2. The type of control will be described in detail below.
  • a resistor R21 is arranged, through which the current from the push-pull output stage T1, T2 through the heating transformer to ground (or. the reference potential).
  • the voltage drop across this resistor is a measure of the current flowing from the second intermediate voltage Uz 'through the primary coil of the high voltage transformer 15 to ground (or reference potential). It is tapped by an amplifier 21 and fed to an analog-to-digital converter of the control unit 13.
  • Fig. 3 describes how the control unit 13 controls the switching elements of the heating current generator 12.
  • the figure shows the course of the voltages UG1 and UG2, which are applied to the control inputs of the switching elements T1 and T2, as well as the course of the voltage Uih, which drops across the resistor R21.
  • the control unit 13 is designed to switch the two switching elements T1 and T2 cyclically alternately.
  • a typical cycle period Tz is advantageously in the range of 10 - 50 ⁇ s.
  • heating phases H1 and H2 The periods in which one of the switching elements T1 or T2 is turned on are referred to below as heating phases H1 and H2, respectively, and are shown in FIG Fig. 3 drawn, wherein in the heating phase H1, the first switching element T1 and H2 in the heating phase, the second switching element T2 is turned on. Between the heating phases H1 and H2 or H2 and H1 both switching elements T1, T2 are turned off.
  • the phases in which both switching elements T1 and T2 are turned off are referred to as resting phases R1 and R2 and are in Fig. 3 also marked.
  • the heating phases have a duration th, the rest periods a duration tr.
  • the time th can be selected identically for both switching elements T1 and T2 in a simple embodiment, as well tr.
  • an alternating current is generated in the primary winding of the heating transformer 15, which is supplied (except for losses in the components, in particular in the heating transformer 15) as heating power of the cathode heater of the magnetron 3.
  • the average magnitude of the heating power is a function of the duty cycle, i. of the quotient th / Tz.
  • Fig. 3 increases after switching one of the switching elements T1, T2 of the current through the primary winding of the heating transformer 15 and thus the voltage drop Uih via resistor R21 and can be measured by the control unit 13 via the amplifier 21.
  • the voltage drop Uih forms a parameter that depends on the resistance of the cathode heater of the magnetron 3. Assuming that no losses occur in the heating transformer 15, Uih towards the end of the heating pulse is inversely proportional to the resistance of the cathode heater.
  • resistor R21 together with amplifier 21 form a measuring circuit which is designed to determine a parameter dependent on the resistance of the cathode heating.
  • Fig. 3 is a time tm plotted, to which the controller 13 measures the voltage drop Uih.
  • This time tm is preferably just before the end tx of the respective heating phase H1 or H2, for example at most 1 ⁇ s before the end tx of the heating phase.
  • a measurement takes place in each heating phase.
  • the product P is at least approximately proportional to the power supplied to the cathode heater.
  • the value of the intermediate voltage Uz ' approximately the value of the intermediate voltage Uz can be used, as it is determined by the control unit via the voltage divider R5, R6.
  • Uz ' corresponds to the value of Uz except for the voltage drop across D1.
  • Uz ' is sometimes somewhat larger than Uz, the difference remains small if the components are dimensioned appropriately.
  • a second voltage divider may be provided in addition to or as an alternative to R5, R6, which supplies the second intermediate voltage Uz 'to the measurement of the control unit 13.
  • P is averaged over a filter time which is at least half a clock period of the line voltage, i. at least 10 ms.
  • An adaptation of the pulse width th occurs only after the filter time has expired.
  • the control unit 13 forms a power regulator, with which the power absorbed by the cathode heater power can be controlled to a desired value.
  • Fig. 4 describes how the control unit 13 controls the switching elements T3 - T6 of the high voltage generator 11.
  • the figure shows the course of the voltages UG3 - UG6, which are applied to the control inputs of the switching elements T3 - T6, and the course of the current Ip in the primary winding of the high voltage transformer and the voltage Ur, which drops across the resistor R20.
  • the control unit 13 is configured to cyclically operate the four switching elements T3-T6.
  • a typical cycle period tc is advantageously in the range of 10 - 50 ⁇ s.
  • the phases P1 and P3 are preferably the same length.
  • the phases P2 and P4 are preferably the same length.
  • the phases P1 and P3 are, however, usually shorter or at most the same length as the phases P2 and P4.
  • the controller 13 When the user activates the microwave oven, ie has given the command to supply energy to the food in the oven, the controller 13 first starts a preheating phase. In this preheating phase, the switching elements T3 - T6 all remain switched off, so that no high voltage is applied to the magnetron 3. The preheating phase is then followed by an operating phase in which the switching elements T3-T6 also operate alternately be taken to apply the high voltage to the magnetron and to produce the desired microwave radiation. The operating phase is described in more detail below.
  • the control unit 13 operates the device, for example, with the in Fig. 4 shown pulse sequence. Accordingly, the first switching element T3 of the first push-pull output stage T3, T4 is initially switched on (in phase P1) in the first two phases P1 and P2, as is the second switching element T6 of the second push-pull final stage T5, T6. The current thus flows from the intermediate voltage Uz through T3, the primary winding and T6 to ground. Now, the first switching element T3 of the first push-pull output stage T3, T4 is turned off while the second switching element T6 of the second push-pull final stage remains switched on. This takes place under load, so that a relatively large thermal loss occurs during the switching transient in the switching element T3.
  • the first switching element T5 of the second push-pull output stage T5, T6 is now switched on, while the second switching element T4 of the first push-pull final stage T3, T4 is already switched on.
  • the switching element T5 is turned off again while the switching element T4 remains switched on. This switching process is again under load, so that in the switching element T5 a relatively large thermal loss occurs.
  • control unit 13 is configured to not only judge the judge with the in Fig. 4 to control the pulse sequence shown.
  • Fig. 5 shows an alternative pulse train.
  • the switching elements T4 and T6 are turned off while still turned on by the switching elements T3 and T5. This results in the primary power losses in the switching elements T4 and T6, while the heating of the switching elements T3 and T5 remains low.
  • control unit 13 is now configured to at least two of the sequences according to Fig. 4-7 use.
  • control unit 13 In order to balance the power between the switching elements T3 and T6, the control unit 13 should thus switch between the operating modes A and A '. In order to balance the power between the switching elements T4 and T5, it should switch between the operating modes B and B '.
  • the switching between different modes of operation can basically be e.g. after every cycle tc take place.
  • the control unit 13 is configured to switch the operating modes synchronously with twice the mains frequency.
  • the switching between operating modes is thus preferably every 10 ms, or every 20 ms, 30ms, etc. In this way, the power loss over a half period of the mains voltage is averaged - since the intermediate voltage Uz has a high residual ripple, can in this way the power fluctuation occurring during a half period is averaged.
  • control unit 13 is configured to combine the operation mode A with the operation mode B, and the operation mode A 'with the operation mode B'.
  • A is switched from A to A 'when switching from B to B', and from B 'to B when switching from A' to A, so that the operation between the two similar pulse sequences in FIG 4 and 5 is changed back and forth.
  • the circuit complexity can be reduced.
  • control unit 13 is configured to combine the operating modes A and B ', as well as the operating modes A' and B, ie between the two similar pulse trains according to 6 and 7 back and forth, in particular periodically toggling. Again, the circuit complexity can be reduced thereby.
  • the described pulse sequence for the full bridge can also be used in a device in which only one transformer with two secondary windings (for heating and high voltage) is provided, the primary winding is fed by the full bridge.
  • a control circuit for a microwave oven which has a full bridge T3 - T6 for supplying the high voltage transformer 14 with AC pulses.
  • the control unit 13 of the device is designed to vary the sequence of control pulses for the switching elements of the full bridge T3-T6 so as to distribute the switching losses as uniformly as possible to the various switching elements.
  • sequence control of the described method steps can be implemented as hardware and / or software in the control unit 13.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Claims (11)

  1. Four à micro-ondes avec un magnétron (3) et avec un circuit d'attaque pour le magnétron (3), le circuit d'attaque ayant :
    un générateur de haute tension (11) pour générer une haute tension pour le magnétron (3), le générateur de haute tension (11) ayant un transformateur de haute tension (14) et un pont complet (T3 - T6) avec un premier et un deuxième amplificateur push-pull, les amplificateurs push-pull étant connectés en parallèle et chaque amplificateur push-pull ayant un premier élément de commutation (T3, T5) en série avec un deuxième élément de commutation (T4, T6), et un bobinage primaire du transformateur de haute tension (14) étant arrangé entre les deux amplificateurs push-pull, et
    une commande (13),
    la commande (13) étant adaptée, de manière alternante dans des cycles de commutations (tc),
    - à activer le premier élément de commutation (T3) du premier amplificateur push-pull (T3, T4) et le deuxième élément de commutation (T6) du deuxième amplificateur push-pull (T5, T6) et
    - à activer le deuxième élément de commutation (T4) du premier amplificateur push-pull (T3, T4) et le premier élément de commutation (T5) du deuxième amplificateur push-pull (T5, T6),
    caractérisé en ce que la commande (13) est adaptée
    - pendant un mode d'opération A à désactiver le premier élément de commutation (T3) du premier amplificateur push-pull, pendant que le deuxième élément de commutation (T6) du deuxième amplificateur push-pull est encore activé, et
    - pendant un mode d'opération A' à désactiver le deuxième élément de commutation (T6) du deuxième amplificateur push-pull, pendant que le premier élément de commutation (T3) du premier amplificateur push-pull est encore activé,
    la commande étant adaptée à commuter entre les deux modes d'opération A et A'.
  2. Four à micro-ondes selon la revendication 1, la commande (13) étant adaptée
    - pendant un mode d'opération B à désactiver le premier élément de commutation (T5) du deuxième amplificateur push-pull, pendant que le deuxième élément de commutation (T4) du premier amplificateur push-pull est encore activé, et
    - pendant un mode d'opération B' à désactiver le deuxième élément de commutation (T4) du premier amplificateur push-pull, pendant que le premier élément de commutation (T5) du deuxième amplificateur push-pull est encore activé,
    la commande étant adaptée à commuter entre les deux modes d'opération B et B'.
  3. Four à micro-ondes selon la revendication 2, la commande étant adaptée à combiner le mode d'opération A avec le mode d'opération B et à combiner le mode d'opération A' avec le mode d'opération B'.
  4. Four à micro-ondes selon la revendication 2, la commande étant adaptée à combiner le mode d'opération A avec le mode d'opération B' et à combiner le mode d'opération A' avec le mode d'opération B.
  5. Four à micro-ondes selon l'une des revendications 2 à 4, la commande étant adaptée à utiliser les modes d'opération B et B' de manière alternante, chaque pendant le même intervalle de temps.
  6. Four à micro-ondes selon l'une des revendications précédentes, la commande étant adaptée à utiliser les modes d'opération A et A' de manière alternante, chaque pendant le même intervalle de temps.
  7. Four à micro-ondes selon l'une des revendications précédentes, le pont complet étant alimenté par une tension secteur redressée qui varie avec la double fréquence secteur, et la commande étant adaptée à commuter les modes d'opération de manière synchrone avec la double fréquence secteur.
  8. Four à micro-ondes selon l'une des revendications précédentes, une diode de roue libre (30) étant arrangée sur chaque élément de commutation.
  9. Four à micro-ondes selon l'une des revendications précédentes, le premier élément de commutation (T3) du premier amplificateur push-pull connectant une tension intermédiaire redressée (Uz) avec une prise centrale du premier amplificateur push-pull, le premier élément de commutation (T5) du deuxième amplificateur push-pull connectant la tension intermédiaire redressée (Uz) avec une prise centrale du deuxième amplificateur push-pull, le deuxième élément de commutation (T4) du premier amplificateur push-pull connectant la prise centrale du premier amplificateur push-pull avec un potentiel de référence et le deuxième élément de commutation (T6) du deuxième amplificateur push-pull connectant la prise centrale du deuxième amplificateur push-pull avec le potentiel de référence, et un bobinage primaire du transformateur de haute tension (14) étant arrangé entre les prises centrales.
  10. Procédé d'opération d'un four à micro-ondes selon l'une des revendications précédentes,
    - pendant un mode d'opération A le premier élément de commutation (T3) du premier amplificateur push-pull étant désactivé, pendant que le deuxième élément de commutation (T6) du deuxième amplificateur push-pull est encore activé, et
    - pendant un mode d'opération A' le deuxième élément de commutation (T6) du deuxième amplificateur push-pull étant désactivé, pendant que le premier élément de commutation (T3) du premier amplificateur push-pull est encore activé,
    il étant commuté entre les deux modes d'opération A et A'.
  11. Procédé selon la revendication 10,
    - pendant un mode d'opération B le premier élément de commutation (T5) du deuxième amplificateur push-pull étant désactivé, pendant que le deuxième élément de commutation (T4) du premier amplificateur push-pull est encore activé, et
    - pendant un mode d'opération B' le deuxième élément de commutation (T4) du premier amplificateur push-pull étant désactivé, pendant que le premier élément de commutation (T5) du deuxième amplificateur push-pull est encore activé,
    il étant commuté entre les deux modes d'opération B et B'.
EP14001471.3A 2014-04-24 2014-04-24 Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension Active EP2852250B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL14001471T PL2852250T3 (pl) 2014-04-24 2014-04-24 Kuchenka mikrofalowa z wyrównaniem obciążenia w generatorze wysokiego napięcia
DK14001471.3T DK2852250T3 (en) 2014-04-24 2014-04-24 Microwave with load equalization in the high voltage generator
SI201430270T SI2852250T1 (sl) 2014-04-24 2014-04-24 Mikrovalovna pečica z izravnavo bremen v visokonapetostnem generatorju
EP14001471.3A EP2852250B1 (fr) 2014-04-24 2014-04-24 Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14001471.3A EP2852250B1 (fr) 2014-04-24 2014-04-24 Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension

Publications (2)

Publication Number Publication Date
EP2852250A1 EP2852250A1 (fr) 2015-03-25
EP2852250B1 true EP2852250B1 (fr) 2017-04-26

Family

ID=50628608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14001471.3A Active EP2852250B1 (fr) 2014-04-24 2014-04-24 Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension

Country Status (4)

Country Link
EP (1) EP2852250B1 (fr)
DK (1) DK2852250T3 (fr)
PL (1) PL2852250T3 (fr)
SI (1) SI2852250T1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742442A (en) 1986-06-17 1988-05-03 Nilssen Ole K Controlled magnetron power supply including dual-mode inverter
FR2625400A1 (fr) * 1987-12-28 1989-06-30 Gen Electric Systeme de generation d'energie micro-onde

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2852250A1 (fr) 2015-03-25
DK2852250T3 (en) 2017-07-10
SI2852250T1 (sl) 2017-08-31
PL2852250T3 (pl) 2017-10-31

Similar Documents

Publication Publication Date Title
DE3879558T2 (de) Resonanzwechselrichtereinrichtung und schaltung zur steuerung der resonanzwechselrichtereinrichtung.
DE112015002279T5 (de) Energie-umsetzungsvorrichtung
CH690891A5 (de) Heizleistungsregulierung für Induktionskochherd.
WO2007003474A2 (fr) Procede de commande pour convertisseur a deux etages
EP2854480B1 (fr) Four à micro-ondes avec contrôle du chauffage dependant aux fluctuations
DE10221450A1 (de) Schaltungsanordnung für einen resonanten Konverter und Verfahren zu dessen Betrieb
DE19925490A1 (de) Konverter mit Resonanzkreiselelementen
EP2852250B1 (fr) Four à micro-ondes doté d'une répartition de charge dans le générateur haute tension
EP3043461B1 (fr) Circuit d'alimentation d'un appareil de soudage
DE102016107578B4 (de) Betriebsschaltung und Verfahren zum Betreiben wenigstens eines Leuchtmittels
EP3857696B1 (fr) Procédé de commande d'un convertisseur à résonance série
DE29622825U1 (de) Bestrahlungsgerät
CH688066A5 (de) Wechselstrom/Gleichstrom-Wandler nach dem Buck-/Boost-Prinzip.
EP3662724B1 (fr) Appareil de commande pour une charge électrique et procédé
EP2854479B1 (fr) Four à micro-ondes doté d'une mise en circuit retardée de la haute tension
DE102008034989B4 (de) Schaltungsanordnung und Verfahren zur Steuerung der Leistungsaufnahme von Beleuchtungsanlagen mit Wechselspannungsspeisung
DE102010063933A1 (de) Betriebsgerät und Verfahren zum Betrieb von Gasentladungslampen
DE102013103145B4 (de) Betriebsvorrichtung und Verfahren mit einer Übergangsphase zwischen Zündung und Betriebsphase zum Betreiben einer Entladungslampe
WO2013135464A1 (fr) Dispositif électronique de puissance comportant une symétrisation d'un nœud de tension dans le circuit intermédiaire
EP3662570B1 (fr) Convertisseur à découpage à régulation de courant et procédé
AT505431B1 (de) Getaktete stromversorgung
DE102016208227B4 (de) Getaktete Stromversorgungseinheit mit galvanischer Trennung
EP2667687B1 (fr) Dispositif de commande de fonctionnement et procédé de fonctionnement d'un agencement de moyen d'éclairage
DE19961228A1 (de) Konverter mit Resonanzkreiselementen
DE102008052532B4 (de) Schaltungsanordnung und Verfahren zur Steuerung der Leistungsaufnahme von Beleuchtungsanlagen mit Wechselspannungsspeisung

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: 20140424

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20150814

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20160222

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20161219

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM AND CO. AG PATENT- UND MARKENANWAELTE , CH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 888889

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502014003515

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20170705

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170426

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170727

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170726

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170726

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170826

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014003515

Country of ref document: DE

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

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Effective date: 20180129

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

REG Reference to a national code

Ref country code: SI

Ref legal event code: SP73

Owner name: V-ZUG AG; CH

Effective date: 20180629

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180430

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: LU

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

Effective date: 20180424

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: 20180430

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

Ref country code: IE

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

Effective date: 20180424

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

Ref country code: PL

Payment date: 20190321

Year of fee payment: 6

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

Ref country code: FR

Payment date: 20190510

Year of fee payment: 7

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

Ref country code: GB

Payment date: 20190418

Year of fee payment: 6

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140424

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

Ref country code: MK

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

Effective date: 20170426

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

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170426

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 888889

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190424

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20200430

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

Ref country code: AT

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

Effective date: 20190424

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

Ref country code: FR

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

Effective date: 20200430

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

Effective date: 20200424

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

Ref country code: DK

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

Effective date: 20200430

Ref country code: GB

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

Effective date: 20200424

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

Ref country code: PL

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

Effective date: 20200424

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230426

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

Ref country code: DE

Payment date: 20240418

Year of fee payment: 11

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

Ref country code: CH

Payment date: 20240501

Year of fee payment: 11

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

Ref country code: SI

Payment date: 20240411

Year of fee payment: 11

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

Ref country code: SE

Payment date: 20240418

Year of fee payment: 11