| 摘要 |
An AC-DC power converter having no input rectifiers is provided. This is obtained by a power converter, which comprises a primary circuit for coupling to an AC voltage source via a first AC input and a second AC input, and with an output having a first forward path, a second forward path and a return path. The converter also comprises a secondary circuit with an input having a first forward path, a second forward path and a return path for receiving power via the corresponding output paths of the primary circuit, and with first and second outputs for delivering a DC power to a load. The primary circuit comprises a first current path between the first AC input and a first output end, a second current path between the second AC input and a second output end, a first power switch, a second power switch, a first coupling capacitor with first and second terminals, a second coupling capacitor with first and second terminals, a first input inductor being arranged in the first current path between the first AC input and the first ouput end and/or a second input inductor being arranged in the second current path between the second AC input and the second output end. Preferred embodiments include a so-called double SEPIC configuration, a so-called double CUK configuration and a so-called AC-HYBRIDGE configutration.
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