US 2024/0196482 A1 · Induction Cooktop and Method for Controlling an Induction Cooktop

Abstract

An induction cooktop is provided that includes a first induction heater and a second induction heater; a control unit; a first switching converter and a second switching converter, operable, preferably cyclically, by the control unit in a control period to energize the first induction heater and the second induction heater, respectively; wherein the control unit is configured to operate, preferably in a first working mode, and wherein: (i) during at least a first fraction of the control period operate simultaneously the first switching converter with a first switching frequency value and the second switching converter with a second switching frequency value, wherein a frequency switching difference between the two switching frequencies values is equal to a value comprised between a first frequency threshold and a second frequency threshold or is above a third frequency threshold.

Claims20

Dependent claims

An induction cooktop comprising:

a first induction heater (3) and a second induction heater (4);
a control unit (15;
115);
a first switching converter (17;
117) and a second switching converter (18;
118), operable by the control unit (15;
115) in a control period (T) to energize the first induction heater (3) and the second induction heater (4), respectively;
wherein the control unit (15;
115) is configured to operate in a first working mode, wherein:
during at least a first fraction (T1) of the control period (T) operate simultaneously the first switching converter (17;
117) with a first switching frequency value (fSW1) and the second switching converter (18;
118) with a second switching frequency value (fSW2);
wherein a switching frequency difference (Δf) between the two switching frequencies values (fSW1, fSW2) is greater than zero and is equal to a value comprised between a first frequency threshold (Δf1) and a second frequency threshold (Δf2) or is above a third frequency threshold (Δf3).

10 more elements

A control method for controlling an induction cooktop comprising a first induction heater (3), a second induction heater (4), a first switching converter (17;

117) and a second switching converter (18;
118);
the first switching converter (17;
117) and a second switching converter (18;
118) being operable in a control periods (T) to energize the first induction heater (3) and the second induction heater (4), respectively;
wherein the control method comprises, in a first mode, steps of:
during at least a first fraction (T1) of the control period operating simultaneously the first switching converter (17;
117) with a first switching frequency value (fSW1) and the second switching converter (18;
118) with a second switching frequency value (fSW2), wherein a switching frequency difference (Δf) between the two switching frequencies values (fSW1, fSW2) is greater than zero and is equal to a value comprised between a first frequency threshold (Δf1) and a second frequency threshold (Δf2) or is above a third frequency threshold (Δf3).

6 more elements

Dependencies are inferred from the claim text.

Induction Cooktop and Method for Controlling an Induction Cooktop

Life of this patent

Induction Cooktop and Method for Controlling an Induction Cooktop

Life of this patent

Abstract

Claims20