Emerson Energy Systems, Ab

Thomas Sahlstrom

Mattias Andersson

Anders Hansson

Jun Ma

Christer Thoren

The present invention relates to a switched mode power supply with programmable digital control and to a power supply system comprising a plurality of switched mode power supplies. The input terminals and the output terminals of the switched mode power supply system are separated by an insulation barrier, and the switched mode power supply comprises a conversion stage having at least one switching element. The switching element of the conversion stage, as well as any switching elements of a possible pre-regulator, is digitally controlled by a programmable digital circuit. In one embodiment of the switched mode power supply, the programmable digital circuit is located on the primary side of the insulation barrier.

Power supply system and apparatus

A rectifier comprising a preregulator ( ) and a DC/DC converter ( ) is disclosed, comprising means for controlling the output power P 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 P in dependence of the input current I 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 P may be controlled by controlling the output current I from the DC/DC converter.

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Huddinge, Sweden

Thomas Sahlstrom