Likriktare och förfarande avseende likriktare

摘要

A rectifier comprising a preregulator (11; 21) and a DC/DC converter (13; 23) is disclosed, comprising means for controlling the output power POUT from the DC/DC converter in dependence of the input power to the preregulator. A method of controlling such a rectifier by controlling the output power POUT in dependence of the input current IIN is also disclosed. This ensures that the output power from the rectifier is never higher than what the preregulator can supply. As a result the rectifier according to the invention may be used at any power level and any input conditions. The output power POUT may be controlled by controlling the output current IOUT from the DC/DC converter.