A Novel High Performance Boost Power Factor Correction (PFC) Converter with an improved Zero Voltage Transition (ZVT) technique

These A novel power factor correction (PFC) Converter employing zero voltage transition (ZVT) technique based boost topology is proposed in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accomplished by employing resonant operation only during switch transitions. During the rest of the cycle, the resonant network is essentially removed from the circuit and converter operation is identical to its non-resonant counterpart. This technique increases the efficiency to 95% and power factor to 0.99. Soft switching of the diode also reduces EMI, an important system consideration.The principle of operation, theoretical analysis, simulation results and experimental results are presented. A prototype of 500 W is built to test the proposed topology. The input voltage is from 170 V rms to 230 V rms. The output voltage is 400 V. The operation frequency is 100 KHz.