US Patent No. 10,772,161

METHOD FOR CONTROLLING AN INDUCTION COOKING HOB INCLUDING A NUMBER OF INDUCTION COILS


Patent No. 10,772,161
Issue Date September 08, 2020
Title Method For Controlling An Induction Cooking Hob Including A Number Of Induction Coils
Inventorship Laurent Jeanneteau, Forli (IT)
Massimo Nostro, Forli (IT)
Alex Viroli, Forli (IT)
Nicola Terracciano, Forli (IT)
Assignee Electrolux Appliances Aktiebolag, Stockholm (SE)

Claim of US Patent No. 10,772,161

1. A method for controlling an induction cooking hob (10) including a number of induction coils (12, 14, 16, 18; 38, 40), wherein a heating process includes a plurality of subsequent fixed time cycles subdivided into one or more flexible time slots (ts), and wherein each induction coil (12, 14, 16, 18; 38, 40) is driven by at least one dedicated induction generator (22, 24, 26, 28), and wherein the method comprises the following steps:setting a requested power (rPj) for each induction coil (12, 14, 16, 18; 38, 40) to be activated by a user,
defining at least one group of one or more induction coils (12, 14, 16, 18; 38, 40), wherein the induction coils (12, 14, 16, 18; 38, 40) of one group have the same requested power (rPj),
determining a number of time slots (Nts) for each time cycle, wherein the number of time slots (Nts) is given by the number of groups of induction coils (12, 14, 16, 18; 38, 40) having the same requested power (rPj),
activating all groups of induction coils (12, 14, 16, 18; 38, 40) to be activated during a first time slot (ts1) at a same current power (cP(1)) for a calculated duration (T(1)), and
activating a part of groups of induction coils (12, 14, 16, 18; 38, 40) to be activated during at least one further time slot (ts2, ts3, ts4) at the same current powers (cP(2), cP(3), cP(4)) in each time slot (ts2, ts3, ts4) for a calculated duration (T(2), T(3), T(4)), if more than one group of induction coils (12, 14, 16, 18; 38, 40) are defined,
so that an average current power (aPj) of each induction coil (12, 14, 16, 18; 38, 40) within the time cycle corresponds with the requested power (rPj) for said induction coil (12, 14, 16, 18; 38, 40).