INDUCTION HEATING DEVICE AND METHOD OF CONTROLLING INDUCTION HEATING DEVICE

An induction heating device according to an embodiment includes an inverter configured to supply an AC current to a working coil and comprising a plurality of switching elements; a driver configured to supply a switching signal for a switching operation of each switching element to the inverter; and a controller configured to control driving of the working coil by supplying a control signal corresponding to a required power value of the working coil to the driver. In an embodiment, the controller may drive the working coil based on the required power value, measures a resonance current value of the working coil when the working coil is driven, calculate a container efficiency index based on an output current value of the working coil, the required power value, the resonance current value and a limit current value, and control the driving of the working coil based on the container efficiency index.