US 2014/0151365 A1 · ELECTRONIC INDUCTION HEATING COOKER AND OUTPUT LEVEL CONTROL METHOD THEREOF

Abstract

An electronic induction heating cooker is provided. The electronic induction heating cooker may include a rectifier that rectifies an input voltage into a direct current (DC) voltage and output the DC voltage, an inverter including first, second and third switches connected in series between a positive power source terminal and a negative power source terminal to generate an alternating current (AC) voltage by switching the DC voltage, a first heater driven by the AC voltage so as to heat a first cooking container, a second heater connected in parallel to the first heater and driven by the AC voltage so as to heat a second cooking container, and a switching controller that generates a switching signal for controlling the first and second heaters in accordance with a set of operating conditions input thereto and adjusts a duty cycle of the switching signal.

Claims20

Dependent claims

An electronic induction heating cooker, comprising:

a rectifier configured to rectify an input voltage into a direct current (DC) voltage and output the DC voltage;
an inverter including first, second and third switches connected in series between a positive power source terminal and a negative power source terminal and configured to generate an alternating current (AC) voltage by switching the DC voltage;
a first heater driven by the AC voltage to generate heat for heating a first cooking container;
a second heater connected in parallel to the first heater and driven by the AC voltage to generate heat for heating a second cooking container;
and
a switching controller configured to generate a switching signal for controlling the first and second heaters in accordance with a set of operating conditions input thereto, and to adjust a duty cycle of the switching signal in response to an adjustment in the operating conditions.

3 more elements

A method of adjusting the output power of an electronic induction heating cooker, the electronic induction heating cooker comprising a resonant circuit including first and second heaters and an inverter, the inverter including first, second and third switches connected in series, the method comprising:

receiving a first operating condition and determining an operation mode from the received first operating condition;
determining a switching signal corresponding to the first operating condition;
receiving a second operating condition;
determining ON and OFF periods of the switching signal in accordance with the second operating condition;
and
outputting the switching signal during the ON period.

3 more elements

A method of controlling an electronic induction heating cooker comprising a resonant circuit including first and second heaters and an inverter including first, second and third switches connected in series, the method comprising:

receiving a first operating command and designating one of a plurality of operation modes for the first and second heaters based on the received first operating command;
determining a switching signal corresponding to the designated one of the plurality of operating modes;
receiving a second operating command;
determining ON and OFF periods of the switching signal in accordance with the second operating command;
and
operating the first and second heaters in accordance with the switching signal.

3 more elements

Dependencies are inferred from the claim text.

Electronic induction heating cooker and output level control method thereof

Life of this patent

Electronic induction heating cooker and output level control method thereof

Life of this patent

Abstract

Claims20