Wu S.,Air Force Early Waming Academy |
Quan J.,Air Force Early Waming Academy |
Zhong Y.,Air Force Early Waming Academy |
Wu B.,Air Force Early Waming Academy
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2012
A new topology of single phase sinusoidal inverter with high-frequency link (HF-L) is proposed. Modified SPWM (MSPWM) pulse sequence is generated by H bridge in primary side of the high-frequency transformer. The MSPWM includes the whole information of SPWM wave except modulation signal low frequency component. Conventional SPWM pulse sequence is demodulated by current doubler synchronous cycloconverter (CDSC) in secondary side. Finally, expectant sine-wave is obtained by filter from the SPWM. This full bridge, CDSC structure is different from prior any kind of this converter family in characteristics. As a result, filtering inductance and bidirectional switches can easily implement natural commutation. Commutation of devices will be independent of load current polarity and commutation overlap of CDSC. Innate voltage and current surge of this sort of converters is overcome. So, control structure can be simply, and hardware investment can be reduced. Spectrum characteristics of MSPWM and output of CDSC, the work principle are deeply analyzed, in this paper. Simulations and experiments show that the theory analysis is correct, and the new topology is feasibility.