A control method for a cooking apparatus is disclosed. The disclosed control method for the cooking apparatus comprises the steps of: receiving an input of an output level for a heating coil; determining a plurality of driving frequencies for a driving power on the basis of the output level; generating a driving power alternately having the plurality of determined driving frequencies; and providing the generated driving power to the heating coil.

An induction heating apparatus is configured to determine a third driving frequency corresponding to a third required power value when the required power value of the first working coil or the second working coil is changed to the third required power value, to calculate a difference value between the driving frequency of the working coil (the required power value of which is not changed) and the third driving frequency, to change an operation mode or a power control mode of the first inverter circuit or the second inverter circuit when the difference value is included in a predetermined first reference range, and to change an output power value of the working coil (the required power value of which is changed) to the third required power value.

An induction heating apparatus may include first/second working coils, first/second inverter circuits and a controller. When a user changes a required power value of a first working coil or a second working coil to a third required power value, a controller determines a third driving frequency corresponding to the third required power value. The controller according to one embodiment calculates a difference value between a driving frequency of the working coil, the required power value of which is not changed, and the third driving frequency, and compares the calculated difference value with a predetermined first reference range. When the calculated difference value is included in the first reference range, the controller changes an operation mode of a first inverter circuit from a full bridge mode to a frequency doubler mode, and changes an output power value of the working coil the required power value of which is changed to the third required power value.

An induction heating device and a method for sensing a cooking vessel on an induction heating device are provided. The induction heating device may include a controller that converts a resonance waveform generated as current is applied to a sensing coil into a square waveform. The controller may determine whether a cooking vessel placed on the induction heating device has an inductive heating property based on a number of pulses of the converted square waveform.

A household appliance apparatus includes a first inverter, a second inverter, a first phase terminal designed for electrical connection to a first phase of a power supply network, a second phase terminal designed for electrical connection to a second phase of the power supply network, and a switching arrangement configured to assign each of the first and second inverters to each of the first and second phase terminals.

Disclosed is an induction heating cooking apparatus. The induction heating cooking apparatus includes a countertop having plurality of cooking areas in which each cooking container can be seated, a plurality of coils provided under the countertop, a main substrate, and an auxiliary substrate separated from the main substrate. The main substrate is provided with a plurality of inverters each connected to a plurality of coils, a noise filter providing a plurality of inverters with a voltage from which noise from an external power supply is removed, and a plug connectable to the external power supply. The auxiliary substrate is provided with an input terminal to which the power line from the plug is connected, an output terminal to which the power line facing the noise filter is connected, and a discharge circuit part connected to the noise filter.

An induction heating device includes a first coil that is wound about an axis by a first number of rotations, a second coil that is spaced apart from the first coil in a radial direction and that is disposed radially outward of the first coil, the second coil being wound about the axis by a second number of rotations, and a power supply unit configured to convert alternating current (AC) power and to supply a high-frequency AC to the first coil and to the second coil based on conversion of the AC power. The induction heating device is configured to output a maximum output level in a range from 6500 W to 7500 W based on a ratio between the first number of rotations and the second number of rotations.

A method and controller (300) for controlling an induction cooker (100) is provided. The induction cooker (100) comprises at least two induction coils (200) for inductively heating cooking vessels (400). A detection signal (500a) is provided to a first of said induction coils (200a) and a detection signal (500b) is provided to a second of said induction coils (200b). A response signal (501a) from the first induction coil (200a) is measured. If the response signal (501a) from the first induction coil (200a) includes an indication (550) of a response signal (501b) generated at the second induction coil (200b) in response to the detection signal (500b) provided to the second induction coil (200b), it is determined that a same cooking vessel (400) occupies both the first induction coil (200a) and the second induction coil (200b).

A cooktop device includes a set of first heating units, a set of second heating units, a set of intermediate heating units arranged spatially between the set of first heating units and the set of second heating units, a set of first inverters designed to operate the set of first heating units and the set of intermediate heating units, and a set of second inverters designed to operate the set of second heating units and the set of intermediate heating units.

An electromagnetically heated cooking utensil, and a heating control circuit and method therefor. The heating control circuit includes a first resonance device; a second resonance device; a first power switch; a second power switch; a first synchronization device that detects voltages of both ends of the first resonance device to output a first synchronization signal; a second synchronization device that detects voltages of both ends of the second resonance device to output a second synchronization signal; and a control device that selects, according to the heating mode of the electromagnetically heated cooking utensil, the first synchronization signal to generate a driving signal for driving the first power switch, a second synchronization signal to generate a driving signal for driving the second power switch.