Supply circuit for a motor disposing of an element providing for power switching, a protection against polarity inversion and an element for limiting the inrush current of a capacitive element

摘要

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.