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To reduce the cost of the conventional two-stage power factor correction (PFC) converters, single-stage PFC (SSPFC) converters have been studied in literature. Most commonly, the SSPFC converters are operated at DCM mode due to the simplicity of the control, non-existence of the reverse recovery losses. For ac/dc converters supporting universal input voltage range, DCM operation with relatively low...
The conventional voltage source inverter is only a buck converter and conventional current source inverter is only a boost converter. By adding a Z-Source network, the buck-boost capability can be achieved. The recently proposed Quasi-Z-Source inverter (qZSI) is an important improvement to Z-Source inverter (ZSI), which greatly reduces the passive component stress. The current-fed qZSI can buck-boost...
A transformerless single-stage AC/DC converter is presented in this paper. With direct power transfer, a portion of input power is only processed once resulting in enhanced conversion efficiency. The intermediate bus voltage is kept below 400 V in universal line input even in light load condition. Moreover, the absence of transformer reduces size and cost of the converter and the switching devices...
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