Soft-Switching Bidirectional Switched-Capacitor DC–DC Converter With Multiple Phase Shift Control Methods

In this article, a bidirectional bridge modular switched-capacitor (BBMSC) dc–dc converter is proposed with soft switching and multiple phase shift control methods, including in-bridge single phase shift (ISPS) control, out-of-bridge single phase shift (OSPS) control, and dual phase shift (DPS) control method. The topology, phase shift control scheme, and operating states are analyzed. Then the circuit characteristics, such as output power and current stress characteristics, are given to analyze and compare the advantages of different phase shift control methods. In addition, the efficiency characteristics of various phase shift control methods are compared and analyzed from the perspective of magnitude of reverse power. A 300-W experimental prototype is constructed to verify the working principle and efficiency characteristic. The comparison of different phase shift control methods is validated by experimental results.