Abstract: Supply circuit (3) for an electric apparatus (1) having a positive supply line (5) and a negative supply line, to which lines a polarity inversion detection module (18), an inrush current module (18) and a capacitive filter element (14) are connected, wherein the capacitive filter element is mounted on a secondary line (15), the ends of which are connected to the positive and negative line, respectively; the circuit comprising a first MOSFET transistor (16) channel N and a second MOSFET transistor (17) channel N mounted in series on the positive line, wherein the first transistor has a gate which is connected to the inrush current detection module and the second transistor has a drain which is connected to the positive line prior to the point of connection between the positive line and the secondary line and a gate which is connected to the polarity inversion detection module.

Abstract: The invention relates to a system (100) for powering an electric machine (M). One particularly interesting application of the present invention is to the field of powering electric motors used in automobiles. The system (100) comprises a voltage source (102), an electronic circuit (108) for supplying the electric machine (M), a first switch (101), wherein the voltage source (102) powers the electronic circuit (108) when the first switch (101) is in a closed position, at least one capacitor (104, 105) mounted in parallel on the voltage source (102) when the first switch (101) is in the closed position, and a precharge circuit (114) for the capacitor (104, 105). The system further includes a second switch (+APC), wherein the precharge circuit (114) is connected to the voltage source (102) when the second switch (+APC) is closed, and the first switch (101) is controlled so as to be closed after the precharge of the capacitor (104, 105).

Abstract: Supply circuit (3) for an electric apparatus (1) having a positive supply line (5) and a negative supply line, to which lines a polarity inversion detection module (18), an inrush current module (18) and a capacitive filter element (14) are connected, wherein the capacitive filter element is mounted on a secondary line (15), the ends of which are connected to the positive and negative line, respectively; the circuit comprising a first MOSFET transistor (16) channel N and a second MOSFET transistor (17) channel N mounted in series on the positive line, wherein the first transistor has a gate which is connected to the inrush current detection module and the second transistor has a drain which is connected to the positive line prior to the point of connection between the positive line and the secondary line and a gate which is connected to the polarity inversion detection module.