Study on the Parallel Resonant Inverter of an High Frequency Induction Heating System which the Frequency Tracking and the Power Regulation is possible

주파수 추종과 정전력 제어가 가능한 고주파 유도가열기의 병렬 공진형 인버터에 대한 연구

This paper has been studied the parallel resonant inverter which controlling the constant power and tracking the load resonant frequency with PLL is possible, in order to minimize switching losses. The current-fed full-bridge type parallel resonant inverter of an induction heating system was composed of IGBT in switching device. For regulating the output power of an induction heating system, the Fuzzy controller is used. The Fuzzy controller makes the control signal for a stable power regulating control and when reference is changed, it is superior to adaptability. It has been evaluated a stable behavior for a noise with switching and a load disturbance.