Design of Series Resonant Inverter for Induction Heating System

• Main Authors: Dang-Fu tu, 涂登富
• Other Authors: Jin-Maun Ho
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/84762898412731162120

碩士 === 中原大學 === 電機工程研究所 === 94 === Abstract Because of improvement of environmental consciousness, compared with conventional direct heating, the induction heating has many advantages such as cleanliness, high-speed heating, safety and better heating quality . On the other aspect, with advances of the latest power semiconductor devices, the switches of inverter can operate in higher frequency ranges. Therefore, the induction-heating systems can reach small, compact, and efficient properties. In this study, a load series resonant induction heating system with voltage source full bridge inverter has been constructed and tested. The system can reach reducing switching losses, component stress, and electromagnetic interference of power semiconductor devices. Since the characteristics of load change with variations of temperature, a Phase Locked Loop (PLL) technology has adopted. By this, the heating system can operate in the most efficient state. Additionally, this research proposes a temperature control by temperature-sensing incorporating with phase-shift Pulse-Width-Modulated (PWM) technology. Finally, the operation characteristics and efficiency of the induction heating system are measured and analyzed. Besides, the change of heating efficiency under variations of load parameters due to temperature change is also studied.