公开(公告)号：US20220151035A1

公开(公告)日：2022-05-12

申请号：US17433635

申请日：2020-02-20

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Massimo ZANGOLI ,  Massimo NOSTRO ,  Alex VIROLI ,  Andrea ROSSI ,  Enrico VALENTINI ,  Emanuel URGESE

IPC: H05B6/06 ,  H05B6/12 ,  H05B6/04

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, 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.

公开(公告)号：US20200022227A1

公开(公告)日：2020-01-16

申请号：US16335722

申请日：2017-08-16

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Nicola TERRACCIANO ,  Laurent JEANNETEAU ,  Alex VIROLI ,  Massimo NOSTRO ,  Svend Erik CHRISTIANSEN

IPC: H05B6/06 ,  H05B1/02 ,  F24C15/10 ,  H05B6/12

Abstract: The invention relates to a method for boil detection at a heating zone of an induction hob (1), the method comprising the steps of: —disabling (S110) a power control mechanism of the induction hob by setting the frequency of the AC-current provided to an induction coil of the induction hob to a fixed value; —measuring (S120) values of an electrical parameter provided within the induction hob (1); —interpolating (S130) the measured electrical parameter values by gathering a plurality of values of the electrical parameter within a time window and calculating the average value of said gathered plurality of values thereby obtaining interpolated electrical parameter values. —calculating (S140) a gradient measure indicative for the differential change of the interpolated electrical parameter values over time; —determining (S150) the boil point based on the calculated gradient measure.

公开(公告)号：US20240251485A1

公开(公告)日：2024-07-25

申请号：US18290327

申请日：2022-04-28

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Alex VIROLI ,  Massimo NOSTRO ,  Adriano SCOTTO D'APOLLONIA ,  Filippo MILANESI ,  Emanuel URGESE ,  Claudio PAOLINI

IPC: H05B6/12 ,  F24C7/06

CPC classification number: H05B6/1281 ,  F24C7/067

Abstract: There is described an induction coil device (4) for an induction cooking hob (1) having a hob plate (2) and a support structure (3). The induction coil device (4) is designed to be interposed between the hob plate (2) and the support structure (3) and comprises at least one induction coil (10), a support frame (11) carrying the induction coil (10), a spring assembly (12) having one or more spring elements (13) configured to interact with the support structure (3) and the support frame (11) and to force the support frame (11) towards the hob plate (2); and a plurality of spacer elements (14) mounted to and protruding from the support frame (11) and designed to abut against the hob plate (2).

公开(公告)号：US20230380022A1

公开(公告)日：2023-11-23

申请号：US18031278

申请日：2021-09-29

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Alex VIROLI ,  Massimo NOSTRO ,  Giacomo CORSI ,  Emanuel URGESE ,  Alan MENGOZZI ,  Fabio ANGELI ,  Massimo ZANGOLI

IPC: H05B6/06 ,  H05B6/12 ,  H03K17/567

CPC classification number: H05B6/065 ,  H05B6/1236 ,  H03K17/567

Abstract: The invention relates to an oscillation unit, in particular oscillation circuit (2), more in particular quasi-resonant oscillation circuit, for generating heating power for an induction cooking appliance (1), in particular for a domestic induction cooking appliance and/or an induction hob, the oscillation unit comprising a resonant tank (30), in particular a resonant circuit, for generating an electrical and/or magnetic field and/or heating power, the resonant tank (30) in particular connected to a first node (21), an, in particular single, switching element (35) connected to the resonant tank (30), in particular by the first node (21), and driven with switching signals for oscillating the resonant tank (30), a measuring unit (40) for measuring a first electrical parameter of the resonant tank (30), in particular for measuring a voltage (VCE)t more in particular for measuring a node voltage (VCE) of the first node (21), and an estimating unit (45) for estimating a second electrical parameter, in particular an electrical power, of the resonant tank (30) based on the first electrical parameter, an induction cooking appliance and a method for operating an oscillation unit.

公开(公告)号：US20220353959A1

公开(公告)日：2022-11-03

申请号：US17764271

申请日：2020-09-22

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Alex VIROLI ,  Laurent JEANNETEAU ,  Massimo NOSTRO ,  Massimo ZANGOLI ,  Svend Erik CHRISTIANSEN

IPC: H05B6/12 ,  H05B6/68

Abstract: The invention relates to a method for determining properties of the electrical current provided to an induction heating element (2) of an induction cooking appliance (1), the induction cooking appliance (1) comprising a heating power energy unit (3) including a heating power generator (4) with at least one switching element (5) adapted to provide pulsed electric power to said induction heating element (2), the induction cooking appliance (1) further comprising an oscillating circuit (6) comprising at least one resonance capacitor (6.1, 6.2), said induction heating element (2) being electrically coupled with said heating power generator (4) and said oscillating circuit (6), the induction cooking appliance (1) further comprising a control entity (8), wherein an input of a measurement circuit (9) is coupled with a node of the heating power energy unit (3).

公开(公告)号：US20210212176A1

公开(公告)日：2021-07-08

申请号：US17059938

申请日：2019-06-03

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Frederico BALEST ,  Laurent JEANNETEAU ,  Alex VIROLI ,  Massimo NOSTRO

IPC: H05B6/12 ,  H05B6/06

Abstract: The present invention relates to a method for controlling a cooking zone (16) of an induction cooking hob, wherein said cooking zone (16) comprises at least one induction coil (16) and is supplied by a generator (14) including a power switch. The method is performed by controlling the power switch by a gate driving signal (18) including a deactivation pulse length (Toff) and an activation pulse length (Ton). A switching period (T) of the gate driving signal (18) is given by the sum of the activation pulse length (Ton) and deactivation pulse length (Toff). A driving frequency (f) of the power switch is the reciprocal value of said switching period (T). The deactivation pulse length (Toff) depends on the resistance (28) and the inductance (30) of the induction coil (16). The activation pulse length (Ton) is varied according to a requested power for the cooking zone (16). A series of constant activation pulse length (Ton) is activated in order to determine the optimal deactivation pulse length (Toff).

公开(公告)号：US20200178357A1

公开(公告)日：2020-06-04

申请号：US16620497

申请日：2018-05-25

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Svend Erik CHRISTIANSEN ,  Gianluca VENTURINI ,  Massimo NOSTRO ,  Laurent JEANNETEAU ,  Alex VIROLI

IPC: H05B1/02 ,  H05B6/06 ,  F24C7/08 ,  F24C3/12

Abstract: The present invention relates to a method for controlling a cooking process by using a liquid in a cooking vessel, for example a cooking pot, upon a cooking hob (20). Said method comprises a step of determining a cooking parameter of the liquid in the cooking vessel at a predetermined time (tB; tBP); a step of adjusting a heating power density (P) of a cooking zone of the cooking hob (20) for transferring a heating power (P) to the cooking vessel placed on said cooking zone; and a step of reducing the heating power density (P) transferred to the cooking vessel from an initial power (iP) to a simmering power (PS). Further, the present invention relates to a cooking vessel for the cooking hob (20). Moreover, the present invention relates to a cooking appliance for performing the cooking process.

公开(公告)号：US20190268978A1

公开(公告)日：2019-08-29

申请号：US16343487

申请日：2016-10-25

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Laurent JEANNETEAU ,  Massimo NOSTRO ,  Massimo ZANGOLI ,  Alex VIROLI

IPC: H05B6/06 ,  H02M7/219 ,  G05F1/445

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).

公开(公告)号：US20190200420A1

公开(公告)日：2019-06-27

申请号：US16322339

申请日：2017-07-28

Applicant: ELECTROLUX APPLIANCES AKTIEBOLAG

Inventor： Laurent JEANNETEAU ,  Alex VIROLI ,  Svend Erik CHRISTIANSEN ,  Massimo NOSTRO ,  Fabio ANGELI

IPC: H05B6/06 ,  H05B6/44

CPC classification number: H05B6/065 ,  H05B6/44 ,  H05B2213/03

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.

公开(公告)号：US20180116014A1

公开(公告)日：2018-04-26

申请号：US15558710

申请日：2016-04-21

Applicant: Electrolux Appliances Aktiebolag

Inventor： Laurent JEANNETEAU ,  Massimo NOSTRO ,  Massimo ZANGOLI ,  Alex VIROLI

IPC: H05B6/06 ,  H05B1/02 ,  F24C7/06

CPC classification number: H05B6/062 ,  F24C7/06 ,  H05B1/0202 ,  H05B2213/07

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).