Abstract:
The invention relates to a power supply circuit (1, 2) for a cooking device, in particular for an induction cooking device, more particularly for an induction hob (80), wherein the power supply circuit is comprising - a, in particular a single, frequency adapting unit (20), in particular filtering unit, for adapting at least one external supply signal (11, 12) into a single or at least one internal AC supply signal (15, 16; 17, 18), - and at least one, at least two, two, at least three or three DC signal generating units (25, 30, 35), each for converting the one or at least one internal AC supply signal (15, 16; 17, 18) into at least one signal component, in particular one or two signal components, of an internal DC supply signal (40, 41, 42, 43, 44; 45, 46) and - at least one, at least two, in particular two, at least three, three, at least four or four, heating frequency generating units (50, 55), each for converting one or at least one DC supply signal (40, 41; 42, 43; 44, 46; 45, 46) supplied by at least one DC signal generating unit (25, 30, 35) into a heating frequency signal (61, 62, 63, 64) for supplying at least one heating unit (70, 75) with electrical power.
Abstract:
The invention relates to a method for operating an induction hob (1), the induction hob (1) comprising a power circuit portion (2) with at least one switching element adapted to provide pulsed electric power to an induction coil (3) and a control entity (4) for controlling operating parameters of the switching element, the method comprising the steps of:, performing a control loop with control cycles in order to detect coupling changes between the induction coil (3) and a piece of cookware, said control cycles comprising the steps of: o receiving frequency information (f curr ) and power information (P curr ) at said control entity (4); o calculating at least one relation coefficient (Ds', Ds'') based on said frequency information (f curr ) and said power information (P curr ); and o comparing said relation coefficient (Ds', Ds'') with a relation coefficient boundary, thereby de- riving a comparison result;, deciding, based on the comparison result, whether to: o perform a new control cycle of said control loop or whether to o stop said control loop and said provision of pulsed electric power to the induction coil (3) and re- start said control loop after updating an operating parameter of the switching element.
Abstract:
An induction cooking hob comprises a plurality of heating units (50), a plurality of switching elements, and a plurality of temperature sensors, wherein each of the temperature sensors is connected to a leg of one of the switching elements. The temperature sensors are adapted to sense the temperature of the dedicated switching element.
Abstract:
The invention relates to a method for exchanging information between a household appliance (1) and a mobile device (2), the method comprising the steps of: providing optical information at a graphical user interface (3) of the household appliance (1) (S10); preferably, aligning the mobile device (2) with respect to the household appliance (1) based on one or more markers (4) displayed at a graphical user interface (5) of the mobile device (2) or based on a time-invariant portion of provided optical information (S11); receiving optical information at the mobile device (2) by capturing said optical information provided at the household appliance (1) by a camera (6) of the mobile device (2) (S12); processing said received optical information at the mobile device (1) in order to derive an information message included in said received optical information (S13); providing said information message or information associated with said information message at a user interface of the mobile device (2) (S14).
Abstract:
The invention relates to a method for calibrating one or at least two power control loops of an induction hob (1), the induction hob (1) comprising one or at least two power stages (10) including one or at least two induction elements (21) and one or at least two measurement units (12), the method comprising the steps of: − deriving one or at least two measurement values being indicative for the power transferred from the one or at 10 least two power stages (10) to one or at least two reference loads by means of said one or at least two measurement units (12); − storing one or at least two correction values in one or at least two storage entities in order to modify measurement values provided by the one or at least two measurement units (12) based on the one or at least two correction values when operating the induction hob (1).
Abstract:
The invention relates to a method for controlling an induction hob (1), the induction hob (1) comprising a plurality of induction coils (3) and two or more power units (4), each power unit (4) being coupled with one or more induction coils (3), wherein a cooking zone is formed by associating one or more induction coils (3) to a coil group (6.1 - 6.4), the method comprising the steps of: - defining one or more coil groups (6.1 - 6.4), each coil group (6.1 - 6.4) being associated with one or more induction coils (3); — calculating a relative power value or relative electrical parameter value of each coil group (6.1 - 6.4) based on a maximum power value or maximum electrical parameter value, the maximum power value being the power value of the coil group with the highest power request, respectively, the maximum electrical parameter value being an electrical parameter value of the coil group (6.1 - 6.4) with the highest power request; - calculating, for each coil group (6.1 - 6.4), a coil activation number based on the relative power value or relative electrical parameter value, the coil activation number being the number of induction coils (3) to be activated in subsequent steps of a coils activation sequence; - establishing a coils activation schedule based on the coil activation number; - operating the induction hob (1) according to the coils activation schedule. wherein the power units (4) are operated according to a master- slave configuration, wherein a master power unit is adapted to calculate the coil activation number, establish the coils activation schedule and operate the plurality of induction coils (3) of a master power unit and one or more slave power units according to the coils activation schedule.
Abstract:
The invention relates to an induction module for powering one or more induction coils (3) of an induction hob (1), the induction module (10) at least comprising: - an induction generator (11) for providing electrical power to an induction coil (3); - a controller (12) for controlling the induction generator (11); - a communication interface (13) for coupling the induction module (10) with a user interface (5); wherein the controller (12) is adapted to operate the induction module (10) at least according to a first and a second configuration mode, wherein in the first configuration mode, the induction module (10) is configured to directly communicate with the user interface (5), and wherein in said second configuration mode, the induction module (10) is adapted to be operated either according to master module or slave module configuration, wherein in master module configuration, the induction module (10) is configured to receive user interface information from the user interface (5) and provide operation information to one or more slave induction modules based on said user interface information and wherein in slave module configuration, the induction module (10) is configured to receive operation information from a master induction module and operate the induction generator (11) according to said operation information.
Abstract:
The invention relates to a method for calibrating a power control loop of an induction hob (1), the induction hob (1) comprising a power stage (10) including at least one induction element (21), a measurement unit (12) and a control unit (11), the method comprising the steps of: − coupling the at least one induction element (21) with a reference load; − powering the power stage (10) at predefined working conditions by means of said control unit (11); − deriving a measurement value being indicative for the power transferred from the power stage (10) to the reference load by means of said measurement unit (12); − providing the measurement value to the control unit (11); − calculating a correction value based on the measurement value and a reference value; − storing the correction value in a storage entity in order to modify measurement values provided by the measurement unit (12) based on the correction value when operating the induction hob (1).