Boost Mode Single-Stage Multi-Input Current Source Inverter with High-Frequency Transformer

Boost mode single-stage multi-input current source inverter with high-frequency transformer and its three-mode one-cycle control strategy are raised and investigated. The inverter consists of multiple current source inverting units, a multi-input high-frequency transformer and a cycloconverter, it achieves single-stage power conversion and high-frequency galvanic isolation with a simple circuit structure. The bypass switch is added to the energy storage inductor to realize the three operation modes of energy storage, energy discharge and bypass, and the magnetic saturation problem in the current source inverter is effectively solved by calculating the duty cycle of energy release in real time, and the quality of output waveform is improved. The soft switch and main circuit parameters of the converter are designed. The practicability and advancement of the topologies and energy management strategy are verified by simulation and experiment.