Power Characteristics of A Novel DC-DC Converter with Carrier Phase-Shifted Control

With the improvement of the requirement on energy conversion and power transmission, the technology of DC-DC converter has developed rapidly. In order to realize the energy transmission between the high voltage side and the low voltage side, this paper proposes a novel DC-DC converter which is made up of modular multilevel converter (MMC) on the primary side and the full-bridge on the secondary side. When it comes to the control scheme, there is an improved carrier phase- shifted pulse width modulation (CPS-PWM), producing a five- level stair wave. The secondary side employs the single-phase- shift (SPS) control. In the meanwhile, the equations on MMC side are obtained, containing AC equivalent output voltage, AC output current and corresponding transient power. Moreover, the power characteristics are demonstrated apparently in MATLAB/simulink.