CURRENT SOURCE TYPE INDUCTION HEATING SYSTEM FOR UNITY POWER FACTOR INPUT

摘要

PURPOSE: A current type induction heating system for inputting a unity power factor is provided to protect a short circuit by using a current source as the input of a resonance part. CONSTITUTION: A rectifier(110) outputs DC power by rectifying commercial electricity. A convertor part(120) generates an input current source by switching the DC power outputted from the rectifier. The convertor part outputs the input current source generated to a resonance part(140). The convertor part comprises a switch(121), an input side inductor(122), and a free wheeling diode(123). The inverter unit performs a switching operation to apply the input current source to the resonance part to forward direction and reverse directions. The inverter unit comprises a first switching device(131), a second switching device(132), a third switching device(133), and a fourth switching device(134). The resonance part changes a switched input current source in the inverter unit into an electromagnetism.