EP0354151A1 - Induction cooking plate having an indication device showing the power effectively supplied to the utensil - Google Patents

Induction cooking plate having an indication device showing the power effectively supplied to the utensil Download PDF

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Publication number
EP0354151A1
EP0354151A1 EP89440079A EP89440079A EP0354151A1 EP 0354151 A1 EP0354151 A1 EP 0354151A1 EP 89440079 A EP89440079 A EP 89440079A EP 89440079 A EP89440079 A EP 89440079A EP 0354151 A1 EP0354151 A1 EP 0354151A1
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EP
European Patent Office
Prior art keywords
display
utensil
induction hob
hob according
power
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
EP89440079A
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German (de)
French (fr)
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EP0354151B1 (en
Inventor
Jean-Michel Loger
Paul Muller
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Compagnie Europeenne pour lEquipement Menager SA
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Compagnie Europeenne pour lEquipement Menager SA
De Dietrich et Cie SA
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Publication of EP0354151A1 publication Critical patent/EP0354151A1/en
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    • 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
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Definitions

  • the present invention relates to a power display device for an induction hob.
  • an induction cooking appliance is constructed according to the block diagram in FIG. 1 and mainly comprises, in a box (a), a support (b) in the form of a non-metallic plate, preferably made of ceramic-ceramic material. , a heating inductor (c) mounted in the immediate vicinity of the support plate (b) and creating an alternating magnetic field closing in a utensil (h) placed on the support plate (b), and a set of electrical components and electronic components constituting a supply circuit (d), a control circuit (e), a power circuit (f) for supplying the coil (c).
  • control member for example a slider or an adjustment button, for varying the power.
  • the power actually transmitted to the cookware is not directly related to the position of the adjustment knob (g).
  • the power transmitted to the cookware varies greatly depending on: - the diameter of the utensil, - the eccentricity of the utensil relative to the center of the induction coil, - the nature of the utensil material.
  • the same position 7 of the control member (g) can correspond to 1,500 w actually transmitted to a cast iron pan and to 800 w transmitted to a stainless steel pan .
  • the induction hob according to the invention includes a device for displaying the power actually transmitted to the load.
  • the display device is composed of at least: - a current acquisition block whose input signal is the alternating current consumed on the mains and whose continuous output signal is a direct image of the input signal, - a shaping device attacked by the output signal of the previous block and transforming the analog value of this signal into a signal usable by a display, - a display receiving the signals from the shaping device.
  • the acquisition unit comprises a current transformer whose primary is a current loop placed immediately before the input of the rectifier of the supply circuit.
  • the hob may include a servo block receiving the output signals from the acquisition block, to provide the control electronics with a signal enabling the utensil to be restored to a power corresponding to the command instruction.
  • FIG. 2 shows in the form of a block diagram, the main functions of an electronic circuit for an induction hob comprising a display device according to the invention.
  • a set of electronic components comprising a supply circuit (51), a control circuit (52), a power circuit (53), - a heating device (60) comprising at least one induction coil (61) placed immediately under a non-metallic support (63), - a utensil (62) placed on the support (63), - a control member (40).
  • the originality of the circuit lies in the addition of a display device (10, 20, 30) composed of an acquisition block (10), a shaping block (20), a display (30); the function of the display device is to indicate on the display (30) a quantity directly related to the power absorbed by the utensil (62).
  • the applicant proposes a preferred embodiment of the invention in FIG. 3 and described below.
  • the input of the acquisition block (10) is constituted by a current loop forming the primary of a current transformer (11) (see Figures 2 and 3).
  • the input signal of the acquisition block (10) is therefore the current consumed on the sector.
  • the secondary of the current transformer (11) is followed by a calibration assembly (12) and a detection assembly (13) mainly consisting of a divider bridge (14), a diode (15) and a capacitor (16).
  • the output signal (V) of the transformer is therefore calibrated and then detected to provide a continuous output signal (Vi) from the acquisition block (10).
  • the output signal (Vi) of the block (10) drives a shaping block (20) which has the function of transforming the analog value of the current into an exploitable value for the display (30).
  • the block (20) can mainly comprise an analog-digital converter associated with a seven-segment converter.
  • the block (20) may include a divider bridge associated with a network of comparators and drivers of LED (light emitting diode)
  • the integrated circuit ensuring the formatting is of logarithmic type (manufacturer reference LM 3915 for example) so that the number of lit points is a logarithmic function of the signal (Vi), because it is more useful to have a plus large number of display points in the low power range.
  • the discrete components performing the formatting function can be replaced by a microprocessor.
  • the circuit may include a servo block (70) whose function is to supply the control electronics with a signal (Va) making it possible to restore to the utensil a power corresponding to the set point supplied by the member.
  • a servo block 70
  • Va a signal
  • the servo cannot adjust the power in the utensil to the setpoint (for example diameter too small), the power components being at their limits, the power restored to the utensil is reduced.
  • the presence of the display device (10, 20, 30) to display the power actually supplied to the utensil takes on its full meaning.
  • the block (70) is composed of a comparator (71), the two inputs of which are respectively attacked on the one hand by the continuous signal (Vi) output from the block d acquisition (10), image of the power in the utensil, and on the other hand by a setpoint signal (c) from the control member (40).
  • the output signal (Va) of the comparator (71) constitutes the input signal of the control electronics (52), the details of which have not been shown, since they do not have any particular construction.
  • the electronic power supply (51) and power (53) circuits are of conventional types, and the variations of the power can be obtained in known manner by cutting the power by wave train and / or by modulation of the conduction time. .
  • the best choice for detecting this current in the load consists in placing the input of the intensity transformer where the current constitutes the most faithful image of the power actually supplied to the utensil, therefore immediately upstream from the power supply (51), and downstream of an input filter (81) and from the low voltage power supply (82) of the device. Direct detection of the current in the device (60) would be more difficult to achieve due to the high values of the intensities and frequencies in this part of the circuit, and would not give the image of the power supplied to the utensil.
  • the output signal (Vi) from the acquisition block (10), intended to drive the shaping signal (20), is also used to perform the In this case, the acquisition block plays two roles: in the production of the display and in the production of the control.
  • the input signal of the servo could be detected by a block distinct from the block (10).
  • Another variant would also consist in performing the functions of one or more of the functional blocks (10, 20, 70, 52, ...) by a microprocessor.
  • the protection is not limited to the LED display mode (light-emitting diode), any other display mode, for example LCD (liquid crystal display) or VFD (fluorescent display) can be used, and is not limited to induction hobs with a single hearth.
  • LED display mode light-emitting diode
  • LCD liquid crystal display
  • VFD fluorescent display

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

The invention relates to an induction cooking plate comprising at least: - one control unit (40), - an assembly of electronic components (50) forming a power supply circuit (51), a control circuit (52), and a power circuit (53) in order to supply, - an inductive coil (61) for heating a utensil (62), characterised in that it furthermore comprises an indication device showing the power effectively supplied to the utensil, and possibly a device for regulating (70) the power effectively supplied to the utensil, under instruction from the control unit (40). Application: induction heating equipment. <IMAGE>

Description

La présente invention concerne un dispositif de visua­lisation de puissance pour plaque de cuisson à induction.The present invention relates to a power display device for an induction hob.

L'application du chauffage par induction à la cuisson des aliments contenus dans un ustensile de cuisine, du genre casserole, est connu.The application of induction heating to the cooking of food contained in a kitchen utensil, such as a pan, is known.

En général, un appareil de cuisson par induction est construit selon le schéma de principe de la figure 1 et comporte principalement, dans un caisson (a), un support (b) en forme de plaque non métallique, de préférence en matériau vitro-céramique, une bobine inductrice (c) de chauffage montée au voisinage immédiat de la plaque support (b) et créant un champ magnétique alternatif se fermant dans un ustensile (h) placé sur la plaque support (b), et un ensemble de composants électriques et électroniques constituants un circuit d'alimentation (d), un circuit de commande (e), un circuit de puissance (f) pour l'alimen­tation de la bobine (c).In general, an induction cooking appliance is constructed according to the block diagram in FIG. 1 and mainly comprises, in a box (a), a support (b) in the form of a non-metallic plate, preferably made of ceramic-ceramic material. , a heating inductor (c) mounted in the immediate vicinity of the support plate (b) and creating an alternating magnetic field closing in a utensil (h) placed on the support plate (b), and a set of electrical components and electronic components constituting a supply circuit (d), a control circuit (e), a power circuit (f) for supplying the coil (c).

De plus, comme sur tous les appareils de cuisson, plaques ou enceintes, l'utilisateur a à sa disposition un organe de commande (g), par exemple un curseur ou un bouton de réglage, pour faire varier la puissance.In addition, as with all cooking appliances, plates or enclosures, the user has at his disposal a control member (g), for example a slider or an adjustment button, for varying the power.

Des appareils du type décrit ci-dessus sont déjà décrits dans les demandes de brevets FR 72 27 277 et FR 76 20 285.Devices of the type described above are already described in patent applications FR 72 27 277 and FR 76 20 285.

Dans tous les appareils connus à ce jour le bouton de réglage agit sur le courant absorbé par le circuit de puissance (f).In all the devices known to date the adjustment button acts on the current absorbed by the power circuit (f).

Malheureusement, dans une plaque à induction, la puissance effectivement transmise à l'ustensile n'est pas en rapport direct avec la position du bouton de réglage (g). Pour une même position du bouton de réglage la puissance transmise à l'ustensile varie beaucoup selon :
- le diamètre de l'ustensile,
- l'excentration de l'ustensile par rapport au centre de la bobine inductrice,
- la nature du matériau de l'ustensile.Unfortunately, in an induction hob, the power actually transmitted to the cookware is not directly related to the position of the adjustment knob (g). For the same position of the adjustment knob, the power transmitted to the cookware varies greatly depending on:
- the diameter of the utensil,
- the eccentricity of the utensil relative to the center of the induction coil,
- the nature of the utensil material.

A titre d'illustration de ce phénomène, une même position 7 de l'organe de commande (g) (voir figure 1) peut correspondre à 1 500 w effectivement transmis à une casserole en fonte et à 800 w transmis à une casserole en inox.As an illustration of this phenomenon, the same position 7 of the control member (g) (see FIG. 1) can correspond to 1,500 w actually transmitted to a cast iron pan and to 800 w transmitted to a stainless steel pan .

L'utilisateur d'une plaque à induction ne peut donc pas, comme il le ferait avec une autre plaque de cuisson, se baser sur l'indication de l'organe de commande pour connaître la puissance effectivement transmise à l'usten­sile.The user of an induction hob cannot therefore, as he would with another hob, rely on the indication of the control member to know the power actually transmitted to the cookware.

L'utilisateur doit apprendre par tâtonnements à corriger l'indication de l'organe de commande pour chacun de ses ustensiles personnels, il n'existe ni méthode, ni dispositif de visualisation adapté.The user must learn by trial and error to correct the indication of the control unit for each of his personal utensils, there is no suitable method or display device.

Pour pallier cet inconvénient, la plaque de cuisson à induction conforme à l'invention comporte un dispositif de visualisation de la puissance effectivement transmise à la charge.To overcome this drawback, the induction hob according to the invention includes a device for displaying the power actually transmitted to the load.

Selon le mode de réalisation préféré décrit ci-après, le dispositif de visualisation est composé au moins de :
- un bloc d'acquisition du courant dont le signal d'entrée est le courant alternatif consommé sur le secteur et dont le signal continu de sortie est une image directe du signal d'entrée,
- un dispositif de mise en forme attaqué par le signal de sortie du bloc précédent et transformant la valeur ana­logique de ce signal en un signal exploitable par un afficheur,
- un afficheur recevant les signaux du dispositif de mise en forme.According to the preferred embodiment described below, the display device is composed of at least:
- a current acquisition block whose input signal is the alternating current consumed on the mains and whose continuous output signal is a direct image of the input signal,
- a shaping device attacked by the output signal of the previous block and transforming the analog value of this signal into a signal usable by a display,
- a display receiving the signals from the shaping device.

Plus précisément, le bloc d'acquisition comporte un transformateur d'intensité dont le primaire est une boucle de courant placée immédiatement avant l'entrée du redresseur du circuit d'alimentation.More specifically, the acquisition unit comprises a current transformer whose primary is a current loop placed immediately before the input of the rectifier of the supply circuit.

En plus du dispositif de visualisation, la plaque de cuisson peut comporter un bloc d'asservissement recevant les signaux de sortie du bloc d'acquisition, pour fournir à l'électronique de commande un signal permettant de resti­tuer à l'ustensile une puissance correspondant à la consigne de commande.In addition to the display device, the hob may include a servo block receiving the output signals from the acquisition block, to provide the control electronics with a signal enabling the utensil to be restored to a power corresponding to the command instruction.

L'invention sera mieux comprise à l'aide de la des­cription ci-après et des figures annexées suivantes :

  • - figure 1 : schéma de principe d'un appareil de type connu.
  • - figure 2 : synoptique d'un circuit électronique comportant un dispositif de visualisation conforme à l'invention.
  • - figure 3 : schéma électronique montrant les prin­cipaux composants du dispositif de visualisation de la figure 2.
The invention will be better understood using the description below and the following appended figures:
  • - Figure 1: block diagram of a known type of device.
  • - Figure 2: block diagram of an electronic circuit comprising a display device according to the invention.
  • - Figure 3: electronic diagram showing the main components of the display device of Figure 2.

On se reportera d'abord à la figure 2 qui montre sous forme d'un synoptique, les principales fonctions d'un circuit électronique pour plaque à induction compor­tant un dispositif de visualisation conforme à l'invention.Reference will first be made to FIG. 2 which shows in the form of a block diagram, the main functions of an electronic circuit for an induction hob comprising a display device according to the invention.

Tout d'abord on retrouve l'agencement classique de la figure 1 avec :
- un ensemble de composants électroniques (50) comportant un circuit d'alimentation (51), un circuit de commande (52), un circuit de puissance (53),
- un dispositif de chauffage (60) comportant au moins une bobine inductrice (61) placée immédiatement sous un support non métallique (63),
- un ustensile (62) placé sur le support (63),
- un organe de commande (40).First we find the classic arrangement of Figure 1 with:
a set of electronic components (50) comprising a supply circuit (51), a control circuit (52), a power circuit (53),
- a heating device (60) comprising at least one induction coil (61) placed immediately under a non-metallic support (63),
- a utensil (62) placed on the support (63),
- a control member (40).

L'originalité du circuit réside dans l'adjonction d'un dispositif de visualisation (10, 20, 30) composé d'un bloc d'acquisition (10), d'un bloc de mise en forme (20), d'un affichage (30) ; le dispositif de visualisation a pour fonction d'indiquer sur l'affichage (30) une grandeur en rapport direct avec la puissance absorbée par l'ustensile (62).The originality of the circuit lies in the addition of a display device (10, 20, 30) composed of an acquisition block (10), a shaping block (20), a display (30); the function of the display device is to indicate on the display (30) a quantity directly related to the power absorbed by the utensil (62).

A titre d'exemple non limitatif, la demanderesse propose un mode de réalisation préféré à l'invention en figure 3 et décrit ci-après.By way of nonlimiting example, the applicant proposes a preferred embodiment of the invention in FIG. 3 and described below.

L'entrée du bloc d'acquisition (10) est constituée par une boucle de courant formant le primaire d'un trans­formateur d'intensité (11) (voir figures 2 et 3). Le signal d'entrée du bloc d'acquisition (10) est donc le courant consommé sur le secteur.The input of the acquisition block (10) is constituted by a current loop forming the primary of a current transformer (11) (see Figures 2 and 3). The input signal of the acquisition block (10) is therefore the current consumed on the sector.

Le secondaire du transformateur d'intensité (11) est suivi d'un ensemble de calibrage (12) et d'un ensemble de détection (13) constitués principalement d'un pont diviseur (14), d'une diode (15) et d'un condensateur (16). Le signal de sortie (V) du transformateur est donc calibré puis détecté pour fournir un signal continu de sortie (Vi) du bloc d'acquisition (10).The secondary of the current transformer (11) is followed by a calibration assembly (12) and a detection assembly (13) mainly consisting of a divider bridge (14), a diode (15) and a capacitor (16). The output signal (V) of the transformer is therefore calibrated and then detected to provide a continuous output signal (Vi) from the acquisition block (10).

Le signal (Vi) de sortie du bloc (10) attaque un bloc (20) de mise en forme qui a pour fonction de trans­former la valeur analogique du courant en une valeur exploitable pour l'affichage (30).The output signal (Vi) of the block (10) drives a shaping block (20) which has the function of transforming the analog value of the current into an exploitable value for the display (30).

Dans le cas d'un affichage par afficheurs à sept segments, non représenté, le bloc (20) peut comporter principalement un convertisseur analogique-numérique associé à un convertisseur-sept segments.In the case of a display by seven-segment displays, not shown, the block (20) can mainly comprise an analog-digital converter associated with a seven-segment converter.

Dans le cas d'un affichage à rampe comme sur la figure 3, le bloc (20) peut comporter un pont diviseur asso­cié à un réseau de comparateurs et de drivers de LED (diode électroluminescente)In the case of a ramp display as in Figure 3, the block (20) may include a divider bridge associated with a network of comparators and drivers of LED (light emitting diode)

De préférence le circuit intégré assurant la mise en forme est de type logarithmique (référence constructeur LM 3915 par exemple) pour que le nombre de points allumés soit une fonction logarithmique du signal (Vi), car il est plus utile de disposer d'un plus grand nombre de points d'affichage dans la plage des faibles puissances.Preferably the integrated circuit ensuring the formatting is of logarithmic type (manufacturer reference LM 3915 for example) so that the number of lit points is a logarithmic function of the signal (Vi), because it is more useful to have a plus large number of display points in the low power range.

Dans tous les cas de figure, les composants dis­crets réalisant la fonction de mise en forme peuvent être remplacés par un micro-processeur.In all cases, the discrete components performing the formatting function can be replaced by a microprocessor.

En outre, le circuit peut comporter un bloc d'asser­vissement (70) dont la fonction est de fournir à l'élec­tronique de commande un signal (Va) permettant de restituer à l'ustensile une puissance correspondant à la consigne fournie par l'organe de commande indépendamment de la position, du diamètre et de la nature du matériau de l'ustensile et ce, dans les limites de caractéristiques des composants de puissance. Lorsque l'asservissement n'arrive pas à ajuster la puissance dans l'ustensile à la consigne (par exemple diamètre trop petit), les composants de puissance étant à leurs limites, la puissance restituée à l'ustensile est réduite. Dans ce cas, la présence du dispositif de visualisation (10, 20, 30), pour afficher la puissance réellement fournie à l'ustensile prend tout son sens.In addition, the circuit may include a servo block (70) whose function is to supply the control electronics with a signal (Va) making it possible to restore to the utensil a power corresponding to the set point supplied by the member. regardless of the position, diameter and nature of the cookware material, within the limits of the characteristics of the power components. When the servo cannot adjust the power in the utensil to the setpoint (for example diameter too small), the power components being at their limits, the power restored to the utensil is reduced. In this case, the presence of the display device (10, 20, 30), to display the power actually supplied to the utensil takes on its full meaning.

Selon le mode de réalisation préféré non limitatif représenté en figure 3, le bloc (70) est composé d'un comparateur (71) dont les deux entrées sont respectivement attaquées d'une part par le signal continu (Vi) de sortie du bloc d'acquisition (10), image de la puissance dans l'ustensile, et d'autre part par un signal de consigne (c) de l'organe de commande (40).According to the preferred nonlimiting embodiment shown in FIG. 3, the block (70) is composed of a comparator (71), the two inputs of which are respectively attacked on the one hand by the continuous signal (Vi) output from the block d acquisition (10), image of the power in the utensil, and on the other hand by a setpoint signal (c) from the control member (40).

Le signal de sortie (Va) du comparateur (71) cons­titue le signal d'entrée de l'électronique de commande (52) dont le détail n'a pas été représenté, car il ne présente pas de particularité de construction.The output signal (Va) of the comparator (71) constitutes the input signal of the control electronics (52), the details of which have not been shown, since they do not have any particular construction.

Les circuits électroniques d'alimentation (51) et de puissance (53) sont de types classiques, et les variations de la puissance peuvent être obtenues de façon connue par découpage de puissance par train d'onde et/ou par modulation du temps de conduction.The electronic power supply (51) and power (53) circuits are of conventional types, and the variations of the power can be obtained in known manner by cutting the power by wave train and / or by modulation of the conduction time. .

Bien entendu, des variantes d'exécution existent, elles peuvent porter par exemple sur le choix des compo­sants, la réalisation des circuits des différents blocs fonctionnels (10, 20,...), l'endroit où l'on mesure l'image de la puissance fournie à l'ustensile.Of course, variants exist, they can relate for example to the choice of the components, the realization of the circuits of the various functional blocks (10, 20, ...), the place where the image is measured of the power supplied to the utensil.

Selon la demanderesse, le meilleur choix pour la détection de ce courant dans la charge consiste à placer l'entrée du transformateur d'intensité là où le courant constitue la plus fidèle image de la puissance effectivement fournie à l'ustensile, donc immédiatement en amont de l'alimentation (51), et en aval d'un filtre d'entrée (81) et de l'alimentation en basse tension (82) de l'appareil. Une détection directe du courant dans le dispositif (60) serait plus difficilement réalisable en raison des fortes valeurs des intensités et des fréquences dans cette partie du circuit, et ne donnerait pas l'image de la puissance fournie à l'ustensile.According to the applicant, the best choice for detecting this current in the load consists in placing the input of the intensity transformer where the current constitutes the most faithful image of the power actually supplied to the utensil, therefore immediately upstream from the power supply (51), and downstream of an input filter (81) and from the low voltage power supply (82) of the device. Direct detection of the current in the device (60) would be more difficult to achieve due to the high values of the intensities and frequencies in this part of the circuit, and would not give the image of the power supplied to the utensil.

En outre, selon le mode de réalisation préféré de la figure 3, le signal de sortie (Vi) du bloc d'acquisition (10), prévu pour attaquer le signal de mise en forme (20), est également utilisé pour réaliser l'asservissement, le bloc d'acquisition joue dans ce cas deux rôles : dans la réalisation de l'affichage et dans la réalisation de l'as­servissement.In addition, according to the preferred embodiment of FIG. 3, the output signal (Vi) from the acquisition block (10), intended to drive the shaping signal (20), is also used to perform the In this case, the acquisition block plays two roles: in the production of the display and in the production of the control.

En variante le signal d'entrée de l'asservissement pourrait être détecté par un bloc distinct du bloc (10).As a variant, the input signal of the servo could be detected by a block distinct from the block (10).

Une autre variante consisterait encore à réaliser les fonctions d'un ou plusieurs des blocs fonctionnels (10, 20, 70, 52,...) par un micro-processeur.Another variant would also consist in performing the functions of one or more of the functional blocks (10, 20, 70, 52, ...) by a microprocessor.

De même la protection n'est pas limitée au mode d'affichage à LED (diode électroluminescente), tout autre mode d'affichage, par exemple à LCD (afficheur à cristaux liquides) ou à VFD (afficheur fluorescent) peut être utilisé, et n'est pas limitée aux plaques à induction comportant un seul foyer.Similarly, the protection is not limited to the LED display mode (light-emitting diode), any other display mode, for example LCD (liquid crystal display) or VFD (fluorescent display) can be used, and is not limited to induction hobs with a single hearth.

Claims (10)

1. Plaque de cuisson à induction comportant au moins :
- un organe de commande (40),
- un ensemble de composants électroniques (50) for­mant un circuit d'alimentation (51), un circuit de commande (52), un circuit de puissance (53) pour alimenter,
- une bobine inductrice (61) de chauffage d'un ustensile (62),
caractérisée en ce qu'elle comporte en outre un dispositif de visualisation de la puissance effectivement transmise à l'ustensile.1. Induction hob comprising at least:
- a control member (40),
a set of electronic components (50) forming a supply circuit (51), a control circuit (52), a power circuit (53) for supplying,
- an induction coil (61) for heating a utensil (62),
characterized in that it further comprises a device for displaying the power actually transmitted to the utensil. 2. Plaque de cuisson à induction selon la reven­dication précédente, caractérisée en ce que le dispositif de visualisation est composé au moins d'un bloc d'acqui­sition (10), d'un dispositif de mise en forme (20), d'un affichage (30) en série ; le bloc d'acquisition (10) comportant un transformateur d'intensité dont le primaire est une boucle de courant traversée par le courant (i) du secteur et placée immédiatement avant l'entrée du redresseur du circuit d'alimentation (51), et dont le secondaire est suivi d'un ensemble de calibrage et de détection transfor­mant le signal de sortie (V) du transformateur en un signal continu (Vi) attaquant l'entrée du dispositif de mise en forme (20).2. Induction hob according to the preceding claim, characterized in that the display device is composed at least of an acquisition block (10), a shaping device (20), a display (30) in series; the acquisition unit (10) comprising a current transformer whose primary is a current loop crossed by the current (i) from the sector and placed immediately before the input of the rectifier of the supply circuit (51), and the secondary of which is followed by a calibration and detection assembly transforming the output signal (V) of the transformer into a continuous signal (Vi) attacking the input of the shaping device (20). 3. Plaque de cuisson à induction selon la revendi­cation précédente, caractérisée en ce que l'ensemble de calibrage et de détection est constitué principalement d'un pont diviseur (14), d'une diode (15) et d'un condensateur (16).3. Induction hob according to the preceding claim, characterized in that the calibration and detection assembly consists mainly of a divider bridge (14), a diode (15) and a capacitor (16 ). 4. Plaque de cuisson à induction selon l'une quel­conque des revendications précédentes, caractérisée en ce qu'elle comporte en outre un dispositif d'asservissement (70) de la puissance effectivement transmise à l'ustensile, à la consigne de l'organe de commande (40).4. Induction hob according to any one of the preceding claims, characterized in that it further comprises a servo device (70) of the power actually transmitted to the utensil, at the instruction of the organ control (40). 5. Plaque de cuisson à induction selon les reven­dications 2,3,4, caractérisée en ce que le dispositif d'asservissement (70) est attaqué directement par le signal continu (Vi) fourni à la sortie du bloc d'acqui­sition (10).5. Induction hob according to claims 2,3,4, characterized in that the control device (70) is directly attacked by the continuous signal (Vi) supplied at the output of the acquisition unit (10) . 6. Plaque de cuisson à induction selon la revendi­cation précédente, caractérisée en ce que le dispositif d'asservissement (70) est composé d'un comparateur dont les entrées sont respectivement attaquées par le signal (Vi) et par le signal de consigne (c) de l'organe de commande, et dont le signal de sortie (Va) est envoyé à l'électronique de commande.6. Induction hob according to the preceding claim, characterized in that the servo device (70) is composed of a comparator whose inputs are respectively attacked by the signal (Vi) and by the setpoint signal (c ) of the control unit, and whose output signal (Va) is sent to the control electronics. 7. Plaque de cuisson à induction selon l'une quel­conque des revendications précédentes, caractérisée en ce que l'affichage (30) est un affichage de type LED (diodes électroluminescentes) et en ce que le dispositif de mise en forme (20) comporte un convertisseur driver de type logarithmique.7. Induction hob according to any one of the preceding claims, characterized in that the display (30) is an LED type display (light-emitting diodes) and in that the shaping device (20) comprises a logarithmic driver converter. 8. Plaque de cuisson à induction selon l'une quel­conque des revendications 1 à 6, caractérisée en ce que l'affichage (30) est un affichage du type LCD (cristaux liquides) et en ce que le dispositif de mise en forme (20) comporte un convertisseur driver de type logarithmique.8. Induction hob according to any one of claims 1 to 6, characterized in that the display (30) is an LCD type display (liquid crystal) and in that the shaping device (20 ) includes a logarithmic driver converter. 9. Plaque de cuisson à induction selon l'une quel­conque des revendications 1 à 6, caractérisée en ce que l'affichage (30) est un affichage du type VFD (fluo- rescent) et en ce que le dispositif de mise en forme (20) comporte un convertisseur driver de type logarithmique.9. Induction hob according to any one of claims 1 to 6, characterized in that the display (30) is a display of the VFD (fluorescent) type and in that the shaping device ( 20) comprises a driver converter of logarithmic type. 10. Plaque de cuisson à induction selon l'une quel­conque des revendications précédentes, caractérisée en ce que la fonction de l'un au moins des blocs fonctionnels (10, 20, 70, 52,...) est réalisée par un micro-processeur.10. Induction hob according to any one of the preceding claims, characterized in that the function of at least one of the functional blocks (10, 20, 70, 52, ...) is carried out by a micro- processor.
EP19890440079 1988-07-25 1989-07-24 Induction cooking plate having an indication device showing the power effectively supplied to the utensil Expired - Lifetime EP0354151B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810169 1988-07-25
FR8810169A FR2634615B1 (en) 1988-07-25 1988-07-25 INDUCTION COOKING PLATE COMPRISING A DEVICE FOR DISPLAYING THE POWER ACTUALLY TRANSMITTED TO THE UTILITY

Publications (2)

Publication Number Publication Date
EP0354151A1 true EP0354151A1 (en) 1990-02-07
EP0354151B1 EP0354151B1 (en) 1995-01-04

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EP19890440079 Expired - Lifetime EP0354151B1 (en) 1988-07-25 1989-07-24 Induction cooking plate having an indication device showing the power effectively supplied to the utensil

Country Status (4)

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EP (1) EP0354151B1 (en)
DE (1) DE68920376T2 (en)
ES (1) ES2066011T3 (en)
FR (1) FR2634615B1 (en)

Cited By (4)

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EP2453715A3 (en) * 2010-11-11 2012-07-25 BSH Bosch und Siemens Hausgeräte GmbH Household operating device and method for centring an attachment to a household operating device
EP2597929A1 (en) * 2011-11-28 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Cooking equipment device
EP3091817A1 (en) * 2015-05-07 2016-11-09 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob
WO2018077384A1 (en) * 2016-10-25 2018-05-03 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob

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AU6246196A (en) 1995-06-21 1997-01-22 Pereyaslavsky, Vasily Grigoryevich Induction electrical heater
US6953919B2 (en) 2003-01-30 2005-10-11 Thermal Solutions, Inc. RFID-controlled smart range and method of cooking and heating
DE102009029252A1 (en) 2009-09-08 2011-03-24 BSH Bosch und Siemens Hausgeräte GmbH Mounting device comprises secondary coil, and load connected with secondary coil, where measuring sensor is provided for sensing measured variable, and transmitter is provided for sending data
DE102009058271B4 (en) * 2009-12-14 2016-09-01 Ingolf Jasch Tempering system for matter, in particular for tempering food and stimulants
DE102012215744A1 (en) * 2012-09-05 2014-03-06 E.G.O. Elektro-Gerätebau GmbH Operating procedure for a hob and hob

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FR2397122A1 (en) * 1977-07-08 1979-02-02 Cunningham Ronald INDUCTION COOKER CONTROL UNIT
EP0042167A1 (en) * 1980-06-17 1981-12-23 Matsushita Electric Industrial Co., Ltd. Induction heating cooking apparatus
US4308443A (en) * 1979-05-01 1981-12-29 Rangaire Corporation Induction cook-top with improved touch control
US4438311A (en) * 1979-07-05 1984-03-20 Sanyo Electric Co., Ltd. Induction heating cooking apparatus

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FR2397122A1 (en) * 1977-07-08 1979-02-02 Cunningham Ronald INDUCTION COOKER CONTROL UNIT
US4308443A (en) * 1979-05-01 1981-12-29 Rangaire Corporation Induction cook-top with improved touch control
US4438311A (en) * 1979-07-05 1984-03-20 Sanyo Electric Co., Ltd. Induction heating cooking apparatus
EP0042167A1 (en) * 1980-06-17 1981-12-23 Matsushita Electric Industrial Co., Ltd. Induction heating cooking apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2453715A3 (en) * 2010-11-11 2012-07-25 BSH Bosch und Siemens Hausgeräte GmbH Household operating device and method for centring an attachment to a household operating device
EP2597929A1 (en) * 2011-11-28 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Cooking equipment device
EP3091817A1 (en) * 2015-05-07 2016-11-09 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob
WO2016177583A1 (en) * 2015-05-07 2016-11-10 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob
CN107535019A (en) * 2015-05-07 2018-01-02 伊莱克斯家用电器股份公司 For the method for the power control circuit for calibrating induced cooking utensils
US10716173B2 (en) 2015-05-07 2020-07-14 Electrolux Appliances Aktibolag Method for calibrating a power control loop of an induction hob
AU2016258767B2 (en) * 2015-05-07 2021-02-04 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob
WO2018077384A1 (en) * 2016-10-25 2018-05-03 Electrolux Appliances Aktiebolag Method for calibrating a power control loop of an induction hob
CN109804713A (en) * 2016-10-25 2019-05-24 伊莱克斯家用电器股份公司 Method for calibrating the power control circuit of induced cooking utensils

Also Published As

Publication number Publication date
ES2066011T3 (en) 1995-03-01
DE68920376D1 (en) 1995-02-16
FR2634615A1 (en) 1990-01-26
EP0354151B1 (en) 1995-01-04
FR2634615B1 (en) 1996-04-12
DE68920376T2 (en) 1995-06-29

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