An energy power converter system 110 is provided. According to one embodiment, the system 110 includes a plurality of parallel converters 110-1 ... 110-N; a main transformer 500 with a separate magnetic path for magnetic fields are generated in the transfo...

A power supply device according to the present invention includes: a capacitor 10 connected in parallel with a battery; two switching circuits 31,32 connected in series with the capacitor 10; a pre-charge switching circuit 33 connected in parallel with one...

An arrangement in connection with an electric drive system, the electric drive system comprising an intermediate circuit (DC), with two or more supply units (S.1-S .n ) and two or more inverter units (I.1-I .n ) connected thereto, and an electric machine (...

DC intermediate circuit capacity (C1-C5), is divided into sections corresponding in number with the number of converter modules (13-17). Each module is allocated a fraction of the DC intermediate circuit capacity forming a local intermediate circuit. The m...