Principle of synthesizing single-stage converters for off-line applications

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The principle of synthesizing single-stage power converters (SSCs) for offline applications is presented in the paper. The principle is primarily based on the concept of the dither effect, from which power factor corrector (PFC) cells comprising energy buffers and high frequency dither signals are introduced. Properly selecting an eligible PFC cell and inserting it in between the input rectifier and DC-link capacitor can yield an SSC. In this paper, the principle and configuration of PFC cells are addressed; thus, quite a few families of SSCs for offline applications can be synthesized from the derived PFC cells. With this principle, not only the SSCs discussed in the literature can be developed alternatively, but novel SSCs can also be synthesized. Most of the SSCs have been proved, in the literature, to be feasible in applications with moderate power levels.