Patent ID: 7352594

Claim:
Stage for rectifying a three-phase current, comprising: an autotransformer having pulsed flow for twelve-phase rectification and having, at an output, six phases which form a six-phase power supply network; two rectifiers, each of which is connected at the input to three separate phases of the six-phase power supply network and which each have two polarised output terminals, two interphase inductors having two input terminals which are connected to the output terminals of the two rectifiers having the same polarity and a centre output point each interphase inductor comprising two windings which are coupled magnetically and which are arranged so that the flows created by the continuous components of the currents which pass through these windings compensate for each other, two terminals of the windings being connected to each other in order to form the centre output point and the other two terminals constituting the input terminals; and a filtration stage which receives at the input the centre points of the two interphase inductors, characterised in that the two interphase inductors comprise a common core which defines a magnetic circuit and all the windings of the two interphase inductors are wound on this common core for the magnetic coupling thereof, and in that the windings of two separate interphase inductors are wound and connected so that the frequency of the flow in the magnetic circuit is equal to three times the frequency of the electrical network which supplies the rectification stage.