The Research About Phase-Shifted Full-Bridge ZCZVS-PWM Convert

The miniaturization of electronic products, portable change, leading to the power of the miniaturization. And the most effective method making the power miniaturization is to make the switching frequency high-frequency. In recent years, the power electronic device performance and related technology have perfected, making the application of high-frequency power supply more commonThe paper developed a DC/DC converter power of size0.5kW, In the traditional phase shift control circuit on the edge of the original joined the saturation inductance and blocking condenser, to achieve the ZVZCS and the power tube of soft switch technology. And the vice edge using times flow rectification technology. The control system uses a double-loop control mode which Voltage outer and current inner. The current inner ring adopts peak-current control whit slope compensation technology, making the system performance good. In addition, in order to increase the security of the system, the circuit provides with overcurrent protection and the overheat protection.The paper also gives the hardware circuit design process. That is, the main circuit, a control circuit, drive circuit, the protective circuit design process.The paper also calculates the specific parameters and selects the model of the circuit device.Finally, the experimental device system is commissioned, The paper gives the waveform diagram of the output of the system, a main power tube, the peak-current control loop. The experimental data showed the result is good. It’s verified the correctness of the design.