Abstract: A device for the differential acquisition of current includes an acquisition circuit including a charge amplifier connected, at the input, to terminals for connection to a signal emitting component, and at the output, to an integrator. A unit for injecting a charge signal is mounted between the terminals and the charge amplifier and is connected to a control unit connected to an output of the acquisition circuit. The control unit is so arranged as to control the injection of a charge signal, to detect a resultant signal at the output of the acquisition circuit and to compare the resultant signal with the injected signal. A method includes controlling such a device.

Abstract: The invention concerns a method for detecting a failure in a three-phase alternator connected to a three-phase rectifier bridge. The method comprises the following steps — rectifying (70) the voltages generated by the three-phase alternator; — adding (76) the rectified voltages taken at the first and second phases in order to obtain a voltage sum; — subtracting (78), from said voltage sum, twice the rectified voltage taken at the third phase, in order to obtain a voltage difference; — comparing (80) the voltage difference to a high threshold and a low threshold; — detecting (82) a failure when the voltage difference is less than said low threshold or when the voltage difference is greater than said high threshold. The invention also concerns a device for detecting failures and an associated computer programme.

Abstract: The invention concerns a method for detecting a failure in a three-phase alternator connected to a three-phase rectifier bridge. The method comprises the following steps:—rectifying (70) the voltages generated by the three-phase alternator;—adding (76) the rectified voltages taken at the first and second phases in order to obtain a voltage sum;—subtracting (78), from said voltage sum, twice the rectified voltage taken at the third phase, in order to obtain a voltage difference;—comparing (80) the voltage difference to a high threshold and a low threshold;—detecting (82) a failure when the voltage difference is less than said low threshold or when the voltage difference is greater than said mot threshold. The invention also concerns a device for detecting failures and an associated computer programme.

Abstract: Device for the differential acquisition of current, comprising an acquisition circuit comprising a charge amplifier connected, at the input, to terminals for connection to a signal emitting component, and at the output, to an integrator, characterized in that a unit for injecting a charge signal is mounted between the terminals and the charge amplifier and is connected to a control unit connected to an output of the acquisition circuit, the control unit is so arranged as to control the injection of a charge signal, to detect a resultant signal at the output of the acquisition circuit and to compare the resultant signal with the injected signal.