Abstract: The invention relates to an electrical network (1) for a vehicle, comprising: a first circuit (2) comprising a first power source (7) and at least one first electronic component (8) powered by the first power source (7); and a second circuit (3) comprising a second power source (10) and at least one second electronic component (11) which can be activated and is powered by the second power source (10). The network (1) also comprises: a connecting member (5) between the first (2) and second (3) circuits, said connecting member (5) allowing, in a first configuration, an exchange of current of a first value between the first circuit (2) and the second circuit (3) and, in a second configuration, an exchange of current of a second value between the first circuit (2) and the second circuit (3), in which the second value is lower than the first value; and a control unit (17) which controls the configuration of the connecting member (5).

Abstract: The signalling method is implemented in an electronic power system (6) of a multiple-phase alternator. The system (6) is of the type comprising a set of rectifiers (5) capable of rectifying the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) produced by the alternator, and a control assembly (2, 3) capable of controlling an excitation current from the alternator, of monitoring the conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) in relation to a nominal characteristic, and of signalling any non conformity. In accordance to the method of the invention, the non conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) is simulated in case of impaired function of at least one of the rectifiers (5).

Abstract: The invention relates to an electrical network (1) for a vehicle, comprising: a first circuit (2) comprising a first power source (7) and at least one first electronic component (8) powered by the first power source (7); and a second circuit (3) comprising a second power source (10) and at least one second electronic component (11) which can be activated and is powered by the second power source (10). The network (1) also comprises: a connecting member (5) between the first (2) and second (3) circuits, said connecting member (5) allowing, in a first configuration, an exchange of current of a first value between the first circuit (2) and the second circuit (3) and, in a second configuration, an exchange of current of a second value between the first circuit (2) and the second circuit (3), in which the second value is lower than the first value; and a control unit (17) which controls the configuration of the connecting member (5).

Abstract: A rotary electrical machine regulation device of the type which can control the electrical machine using a predetermined set value of a direct voltage (B+) of the on-board electrical network of the vehicle in which the machine is installed. An excitation current (EXC) is supplied to the alternator (machine), and has a duty cycle (RC) which is determined by a digital processing block (9), on the basis of an error voltage between the predetermined set value and the direct voltage of the electrical network. Accordingly, a system (11) is provided herein for making the digital block electrically self-sufficient. The system includes a voltage maintenance device with a self-sufficient capacitor (110), and a self-sufficient control element (111).

Abstract: The signalling method is implemented in an electronic power system (6) of a multiple-phase alternator. The system (6) is of the type comprising a set of rectifiers (5) capable of rectifying the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) produced by the alternator, and a control assembly (2, 3) capable of controlling an excitation current from the alternator, of monitoring the conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) in relation to a nominal characteristic, and of signalling any non conformity. In accordance to the method of the invention, the non conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph1, Ph2, Ph3, Ph4, Ph5, Ph6) is simulated in case of impaired function of at least one of the rectifiers (5).

Abstract: A rotary electrical machine regulation device of the type which can control the electrical machine using a predetermined set value of a direct voltage (B+) of the on-board electrical network of the vehicle in which the machine is installed. An excitation current (EXC) is supplied to the alternator (machine), and has a duty cycle (RC) which is determined by a digital processing block (9), on the basis of an error voltage between the predetermined set value and the direct voltage of the electrical network. Accordingly, a system (11) is provided herein for making the digital block electrically self-sufficient. The system includes a voltage maintenance device with a self-sufficient capacitor (110), and a self-sufficient control element (111).

Abstract: Device for supplying the inductor (3) of a rotating electrical machine, the device comprising a circuit (21) for supplying the inductor in nominal mode. The device also includes a circuit (22) for supplying the inductor (3) in auxiliary mode and a mode selector (23) capable, on the one hand, of comparing the output voltage (Ualt) delivered by the machine with a threshold voltage at least equal to the minimum voltage for operating the nominal supply circuit (21) and, on the other hand, of selecting the auxiliary supply mode if the output voltage (Ualt) is below the threshold voltage. Application to motor vehicle load circuits.

Abstract: A method and device for estimating the current output by an alternator for a motor vehicle provide the calculation of an output value (IALT) that represents the current output by the alternator based on a first input value (lex) that represents an excitation current of the alternator, and based on a second input value (ROT) that represents the rotational speed of the alternator.

Abstract: The invention relates to an electric machine comprising a stator (10), a rotor (11) and a device for measuring a current in said rotating electric machine feeding electric loads (14, 15). Said device is arranged between the stator (10) and the electric loads (14, 15) in such a way that it makes it possible to measure a current (11, 12, 13, 14) running therebetween.

Abstract: A device for regulating the voltage at which an automobile battery is charged by an alternator, having a control circuit and a power circuit, as well as an external management unit connected to the control circuit in order to transmit different regulation parameters to it, the power circuit also being connected to the external management unit and including means enabling it to generate by itself an excitation signal when the management unit delivers a control signal, the control circuit being activated to emit an excitation signal only when it detects the start of rotation of the alternator.

Abstract: A system and method are provided to manage the excitation of an automobile alternator through the use of its regulator which delivers to the inductor of the alternator a pulse width modulation excitation signal. The regulator receives, from an external management unit, a pulse width modulation excitation control signal with a frequency less than that of the excitation signal. The regulator delivers an excitation signal with a pre-programmed cycle ratio for a sufficient duration to enable the regulator to determine the control information carried by the control signal from the management unit. The regulator continues the excitation signal with the pre-programmed cycle ratio until receipt of instruction from the management unit to regulate the battery voltage.

Abstract: The method of regulation includes:starting to measure the rectified voltage at the output of the alternator during each period T of this voltage,performing this measurement by sampling over a predetermined period T.sub.e,comparing this measured value of the rectified voltage with a calculated reference value, anddeducing from this comparison the duration of the first phase T.sub.1 for the next following period T, this first phase being the one in which the battery voltage of the vehicle is applied to the alternator rotor winding. The sampling measurement of period T.sub.e ends, in each period T, at an instant T-.epsilon., where .epsilon. is a period of time which is very short by comparison with the length of the period T.

Abstract: A regulator circuit for regulating the voltage delivered by an alternator for charging an associated battery, the alternator including an excitation winding and the regulator circuit controlling the current flowing through said excitation winding by switching between a first state in which excitation current increases and a second state in which excitation current decreases, said current being controlled as a function of a voltage value delivered by said alternator, wherein the circuit comprises:(a) detection means for determining whether the time during which the regulator circuit is in its first state is greater than a threshold time;(b) means for generating a speed signal representative of the speed of rotation of the alternator;(c) means responsive to a signal provided by the detection means to periodically compare said speed signal with a predetermined relationship establishing admissible decrease in the speed of rotation of the alternator as a function of time; and(d) means for temporarily switching sai

Abstract: A regulator circuit for the voltage for charging a battery by an alternator comprises in succession:processing and comparison means (A4, A1, A2) receiving a fraction of an alternator voltage (D+) and generating a monotonic variation of the mean voltage regulated as a function of the load on the alternator,power switching means (CP, T101) in series with an excitation winding (Le).Semiconductor correction means (CP) are associated directly and non-resistively with the power switching means and produce an offset of said voltage fraction which varies monotonically with the intensity of the current in the excitation winding and of the load on the alternator, in order to compensate said monotonic variation generated by the processing and comparison means and to obtain a mean value of the charging voltage which is essentially constant over all of the operating range.