Abstract: The present disclosure relates to an induction heating apparatus and a method of controlling the same. A controller of the induction heating apparatus according to the present disclosure may set an operation mode of an inverter circuit to a half bridge mode when a required power value of a working coil is set to a value less than a reference power value such that a driving frequency of the working coil decreases while an actual power value of the working coil is kept the same as the required power value. Additionally, the controller of the induction heating apparatus may adjust a duty ratio of a switching signal input to a switching element included in the inverter circuit, thereby adjusting the actual power value of the working coil.

Abstract: A method for controlling an induction heating apparatus according to one embodiment includes receiving a heating start command; determining whether or not to perform a temperature correction operation based on a difference between a current driving start time point of a working coil and a previous driving end time point of the working coil; obtaining an equivalent resistance value of the working coil and a container placed on the working coil by driving the working coil at a preset reference frequency, when it is determined to perform the temperature correction operation; obtaining a temperature correction value based on the equivalent resistance value; obtaining a temperature value sensed by a temperature sensor; and correcting the temperature value based on the temperature correction value.

Abstract: A method for controlling an induction heating apparatus of one embodiment comprises starting to heat a container, obtaining an inductance value of the container, calculating an overheating determination index based on the inductance value, comparing the overheating determination index with a predetermined first reference value, and determining whether to stop heating the container based on results of the comparison between the overheating determination index and the first reference value.

Abstract: The present disclosure relates to an induction heating device and a control method thereof. In one embodiment, at a time of a simultaneous operation of a first working coil operating at a first driving frequency and a second working coil operating at a second driving frequency, control for removing interference noise is performed based on a difference between the first driving frequency and the second driving frequency. An induction heating device of one embodiment may adjust the duty ratio of a switching signal provided to a first inverter circuit after adjusting the first driving frequency to adjust the actual output value of the first working coil to a value the same as the required output value of the first working coil.

Abstract: An induction heater device and a method for controlling an induction heating device are provided. The method may include determining a first target frequency of a first working coil corresponding to the drive command for the first working coil, determining a second target frequency of a second working coil corresponding to the drive command for the second working coil, and determining a final drive frequency of the first working coil and a final drive frequency of the second working coil based on the first target frequency and the second target frequency, respectively.

Abstract: Proposed is a wireless power transfer (WPT) cooktop device which includes at least one inductive coupling element including coils of wire which generate a magnetic field when a current is applied thereto, an NFC reader which is located in correspondence to the inductive coupling element, recognizes a near field communication (NFC) tag of a small electric appliance, and reads information related to the small electric appliance from the NFC tag, and a controller which receives the information related to the small electric appliance from the NFC reader, identifies a position of the small electric appliance and the small electric appliance on the basis of the information related to the small electric appliance, transmits wireless power to the small electric appliance through the inductive coupling element corresponding to the identified position, and turns off the NFC reader when transmitting the wireless power to the small electric appliance.

Abstract: An induction heating device according to and embodiment may include a working coil; an inverter circuit comprising a plurality of switching elements and configured to supply currents to the working coil; a rectifier circuit configured to rectify the voltage supplied from an external power source; a smoothing circuit configured smooth the voltage output from the rectifier circuit; a drive circuit configured to supply a switching signal to each of the switching circuits; a controller configured to supply a control signal for outputting the switching signal to the drive circuit; a shunt resistor connected between the smoothing circuit and the inverter circuit; an input current sensing circuit configured to sense an input current value of the inverter circuit based on a current flowing through the shunt resistor; and a resonance current sensing circuit a resonance current value of the working coil based on the current flowing through the shunt resistor

Abstract: An induction heating apparatus according to an embodiment of the present specification comprises a main control circuit for adjusting the capacitance of the variable capacitor circuit according to a driving mode of the inverter circuit determined on the basis of a load resistance value of a container placed on the working coil and adjusting the magnitude of the direct current link voltage according to a final voltage value calculated on the basis of an equivalent resistance value of the container and the working coil and a required power value for the working coil.

Abstract: An induction heating apparatus may determine a required power value of a heating zone, based on a power level set for the heating zone, detect a container by using an inner working coil and an outer working coil, determine a working coil to be driven, based on results of the detection of the container, determine a driving mode of the working coil to be driven, based on the required power value, and provide a control signal, based on the driving mode.

Abstract: An induction heating apparatus may include a first working coil provided in a position corresponding to a first heating region, a second working coil provided in a position corresponding to a second heating region, an inverter circuit configured to supply current for driving at least one of the first working coil or the second working coil and comprising a plurality of switching elements, and a drive circuit configured to supply a switching signal to each of the switching elements. A controller configured to determine a driving mode of the working coil when a heating start command for at least one of the first working coil or the second working coil is input, and to supply a control signal for outputting of the switching signal to the drive circuit based on the determined driving mode.

Abstract: An induction heating apparatus may include a first working coil provided in a position corresponding to a first heating region, a second working coil provided in a position corresponding to a second heating region, an inverter circuit configured to supply current for driving at least one of the first working coil or the second working coil, and a drive circuit configured to supply a switching signal to each of the switching elements. A controller may be configured to determine a driving mode of the working coil when a heating start command for at least one of the first working coil or the second working coil is input, and the controller may provide a control signal for outputting the switching signals based on the determined driving mode.

Abstract: A method for controlling an induction heating apparatus comprises receiving a power level for a heating region, supplying a switching signal to an inverter circuit based on a predetermined reference frequency, measuring an output current value of the inverter circuit, measuring a DC link voltage value, calculating an output power value of the working coil based on the output current value of the inverter circuit and the DC link voltage value, determining a heating frequency of the inverter circuit based the result of comparison by comparing the output power value of the working coil with a required power value, and supplying a switching signal to the inverter circuit based on the heating frequency.

Abstract: The present disclosure relates to an induction heating apparatus and a method of controlling the same. A controller of the induction heating apparatus according to the present disclosure may set an operation mode of an inverter circuit to a half bridge mode when a required power value of a working coil is set to a value less than a reference power value such that a driving frequency of the working coil decreases while an actual power value of the working coil is kept the same as the required power value. Additionally, the controller of the induction heating apparatus may adjust a duty ratio of a switching signal input to a switching element included in the inverter circuit, thereby adjusting the actual power value of the working coil.

Abstract: The present disclosure relates to an induction heating device. A loaded-object sensor according to the present disclosure is arranged concentrically and centrally in the working coil. Thus, the sensing coil and the working coil are adjacent to each other. When a current for the heating operation is applied to the working coil, an induction voltage is generated in the sensing coil by magnetic force generated by the current applied to the working coil. According to the present disclosure, a limiting circuit is used to reduce the induction voltage generated in the sensing coil when the heating operation of the working coil is performed.

Abstract: An induction heater device and a method for controlling an induction heating device are provided. The method may include determining a first target frequency of a first working coil corresponding to the drive command for the first working coil, determining a second target frequency of a second working coil corresponding to the drive command for the second working coil, and determining a final drive frequency of the first working coil and a final drive frequency of the second working coil based on the first target frequency and the second target frequency, respectively.

Abstract: The present disclosure relates to an induction heating device. A loaded-object sensor according to the present disclosure is arranged concentrically and centrally in the working coil. Thus, the sensing coil and the working coil are adjacent to each other. When a current for the heating operation is applied to the working coil, an induction voltage is generated in the sensing coil by magnetic force generated by the current applied to the working coil. According to the present disclosure, a limiting circuit is used to reduce the induction voltage generated in the sensing coil when the heating operation of the working coil is performed.