An Improved Control Strategy for Full-controlled Single-phase H Bridge Rectifier

In this paper, an improved single-phase H bridge rectifier controller with high power factor, and low DC ripple is presented. After introduction the working principle and electrical circuit topology of single-phase rectifier with the H bridge, the design method of its essential parts of controller, phase locked loop (PLL) and proportional resonant (PR) control strategy, is discussed. These two parts play important role to achieve extremely high power factor and low DC ripple. And via Matlab/Simulink simulation, this conclusion is showed. At the last part of this paper, the physical experiment was carried out on a 10kV rectifier and the result proved the effectiveness of the presented controller.