INVERTER CIRCUIT FOR INDUCTION HEATING RICE COOKER

摘要

PURPOSE: An inverter circuit for an induction heating rice cooker is provided to maintain a constant output level without changing of output according to the variation of the heating load or AC power by controlling a switching frequency. CONSTITUTION: An inverter circuit for an induction heating rice cooker comprises a power supply(310) for supplying an input power to a rice cooker by rectifying and filtering AC power; an inverter(400) for heating the rice cooker in accordance with the input power; a constant output power reference parameter generating unit(500) for setting the constant output power reference parameter of the rice cooker according to the variation of the AC power and the variation of the load of the rice cooker; and an inverter driving unit(810) for outputting a driving pulse for controlling a switching frequency of the inverter according to the difference of the constant output power reference parameter and the AC power in such a manner that the output power of the inverter is constant.