Device for controlling the precharge of a bulk capacitor and for detecting faults in a dc current circuit

A DC current circuit comprising:

• a DC voltage source;
• a bus comprising at least two conductive elements, each coupled to one of the one or more terminals of the DC voltage source;
• a capacitive element forming a bulk capacitor having each of its electrodes coupled to one of the two conductive elements of the bus;
• a first precharge switch coupled to an electrode of the bulk capacitor;
• and
• a device for controlling a precharge of the bulk capacitor and for detecting faults in the DC current circuit comprising:
• a pulse transformer provided with a primary and with at least a first secondary and a second secondary;
• and
• a circuit for controlling the precharge of the bulk capacitor, coupled to the primary of the pulse transformer;
• wherein the first secondary of the pulse transformer comprises a first terminal configured to be coupled to a control input of the first precharge switch;
• and
• wherein the second secondary of the pulse transformer is configured to be coupled in parallel with the bulk capacitor.