Continuous Sinusoidal Output Voltage Generation with a Single Phase Cascaded H-Bridge Converter

This paper introduces an algorithm to calculate the trajectories of both, the output voltages of a Cascaded H-Bridge converter and the controlled voltage of the supplying Dual Active Bridge to provide a perfectly smooth output voltage with only very small filter components. In this contribution the principle is demonstrated by the generation of a sinusoidal output voltage. After presenting the necessary topology of the converter the mathematical description for the equations for the continuous output operation mode are explained. Measurements at a 8 kW prototype verify the working principle.