Coupled-inductor rectification and cycloconversion

AC-to-DC rectifiers and polyphase AC-to-DC cycloconverters are derived from the basic DC-to-DC converters by the addition of negatively coupled inductors with a minimal number of switching devices. The circuits also use space and time-multiplexed magnetics to handle the multiple inputs and outputs. The application of current-programming linearizes the duty ratio control, improves the output and input waveforms, reduces the small-signal transfer function to a first-order system, and speeds the response to pulse-load variations