Developing A 1kW/200V High Precisionfull Bridge Converter

With the development of oil-exploration and underground measurement technique, the requirements of equipment to power supply are more strictly. Frequent conversion of operative mode need power supply better dynamic performance, and it requires highprecision output to satisfy the accuracy of measurement. Therefore, the design of power supply underground should take dynamic and steady performance into consideration.This article aims at improving the steady accuracy and response speed of the full bridge converter. The V2 C controller is used to achieve the anticipative goal which has great advantages in improving the dynamic and steady performance of the converter. Besides the optimization of the converter will also be considered. Expected target is achieved, which is improving dynamic and steady characteristics.Firstly, the factors which impact on dynamic and static performance of the fullbridge converter are studied, and the converter, amplifier, filter are designed according to the factors. Secondly, small signal model of full bridge converter with V2 C controller is established. The coefficients of the feedback and voltage regulators are determined based on the study of gain, bandwidth and stability. And then, the discrete iterative model is obtained to determine condition for stability. The adaptive slope compensation is proposed to meet the requirements of stability on the basis of reducing adverse effects on converter. Finally, simulation and experiments are performed to prove superiority of V2 C controller and the appropriation of the voltage regulator coefficient.Experimental platform is built to test the output performance, which is a power supply based on full-bridge converter with digital V2 C controller. The experimental results show that the V2 C controller has the both advantages of the V2 control method and the current control method, which can improve the dynamic and static performance when load disturbance. Meanwhile, the variable slope compensation satisfies the condition of stability with less influence on the output.