The Study On High-Frequency Resonnant For Induction Heating

Since the invention of the induction heating power supply, it has been widely used in metal heating treatment industrial, and has been a powerful pushing force for national economy. Now, research on the induction heating power supply especially on high frequency applied is emphasis more than ever. This paper researches high frequency solid induction heating power supply. After detail analyzing the LLC load, it proposes a novel high-frequency resonant circuit, and makes the circuit closed-loop controlled.Chapter 1 introduces the history of induction heating power supply, development achievement nowadays and the trend of the future. Then, it has introduced Class-E amplifier, the mean of this paper and the main job of experiment.Chapter 2 introduces the characteristic of LLC resonant, and proposes a novel high-frequency resonant inverter topology. It analyses the topology's operation principle, and shows the characteristic of the topology.Chapter 3 pays attention to the design of the power supply, and proposes a novel control method basing on the characteristic of LLC resonant inverter. The method protects the power supply and makes inverter closed-loop controlled.Chapter 4 is the simulation of the topology and Chapter 5 introduces the experiment.