Induction heating device with improved interference noise elimination and output control functions

An induction heating device, comprising:

• a resonance circuit including a working coil and a resonance capacitor;
• an inverter configured to perform a switching operation to thereby supply a resonance current to the working coil;
• a plurality of snubber capacitors electrically connected to the inverter;
• a direct current (DC) link capacitor electrically connected to the inverter;
• and
• a relay configured to electrically connect one of the plurality of snubber capacitors to the DC link capacitor or the resonance capacitor,
• wherein the relay is configured to:
• in a first state, electrically connect the one of the plurality of snubber capacitors to the DC link capacitor such that the resonance capacitor is electrically connected in series with the working coil, and the one of the plurality of snubber capacitors is electrically connected in parallel with the resonance capacitor and the working coil, and
• in a second state, electrically connect the one of the plurality of snubber capacitors to the resonance capacitor such that the resonance capacitor is electrically connected in parallel with the one of the plurality of snubber capacitors, and the working coil is electrically connected in series with the resonance capacitor and the one of the plurality of snubber capacitors.