| A new hybrid full-bridge inverter which is suitable for ultra-high frequency induction heating power supplies is presented in this paper. The proposed topology has characteristics, which act as class-E inverter that the stray inductance of the input bus and the inverter output can be absorbed. Besides, the output capacitance of the switch can be absorbed by the resonance capacitance. This topology also makes it possible that no dead time is reserved for the complementary drives, and, if works properly, it can achieve Zero-Voltage Switching(ZVS) turn-on and approximate Zero-Current Switching(ZVS) turn-off. So it is suitable in the high frequency area.Chapter 1 introduces the basic knowledge and development history of induction heating power supply, the domestic and foreign development trend is also stated.Based on the merit and demerit of the related topologies that suit for ultra-high frequency induction heating power supplies, chapter 2 analyses a novel hybrid full-bridge inverter for ultra-high frequency induction heating application and the detail principle of the inverter.Chapter 3 gives the solution of the problem that there exists a zero platform in the load voltage which makes it hard to extract the voltage signal, and the related PLL content is also discussed; what's more, it also contains the design of MOSFET drive in ultra-high frequency.Chapter 4 gives the design of the experimental prototype.Chapter 5 gives the result of the experiment. |
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