Abstract: A DC/DC voltage converter between a high-voltage electrical network and a low-voltage electrical network comprises a plurality of cells connected in parallel. Each cell comprises a chopper DC/DC converter and a single protection transistor connected in a high-voltage portion of the converter thereby enabling any of the cells to be taken out of service independently of the other cells while minimizing power consumption in normal operation.

Abstract: A method for controlling an alternator includes determining a rotor position of the alternator using data obtained from a first data source when a first condition is met, and determining the rotor position for the alternator using data obtained from a second data source when a second condition is met.

Abstract: A method for controlling an alternator includes determining a rotor position of the alternator using data obtained from a first data source when a first condition is met, and determining the rotor position for the alternator using data obtained from a second data source when a second condition is met.

Abstract: A method of detecting an angular position of a rotor of an electrical machine includes determining a rotor position for the electrical machine using data obtained from a first data source, determining a rotor position for the electrical machine using data obtained from a second data source, and switching between determining a rotor position using data obtained from the first data source and using data obtained from the second data source. A point at which switching occurs is different when a speed of rotation is increasing than when the speed of rotation is decreasing.

Abstract: A method of controlling a machine including at least one inductive coil (n), the inductive coil being connected to a primary electricity power supply network (RP) via a control circuit comprising, between a connection point (A) of the coil (n) in question and terminals of the primary network (RP), at least one half-bridge of a variator adapted to controlling said machine, the half-bridge being formed by first and second controlled switches (T+n, T?n). In the method, connection point (A) of said coil (n) is connected to at least one third controlled switch (Tn-x), the third switch (Tn-x) constituting a bypass switch connected to at least one secondary electricity power supply network (Rx), and the electrical state of the third switch (Tn-x) is associated with that of the half-bridge.

Abstract: A DC/DC voltage converter between a high-voltage electrical network and a low-voltage electrical network comprises a plurality of cells (100, 200, . . . , 600) connected in parallel. Each cell (100, 200, . . . , 600) comprises a chopper DC/DC converter and a single protection transistor (13, 23, . . . , 63) preferably connected in a high-voltage portion of the converter and enabling said cells to be taken out of service independently of the other cells while minimizing power consumption in normal operation.

Abstract: In order to detect the electrical position of the rotor of an electrical machine (4) coupled (6) to an internal combustion engine (7) provided with a sensor (8) delivering a first angular position signal for speeds of rotation greater than a minimum measurement speed (VM), a second signal is generated on the basis of the characteristics of the electrical machine, the second signal being representative of an estimated angular position of the rotor for speeds of rotation that are less than an estimation speed (VA); depending on the estimated speed of rotation, means for controlling the machine are supplied either with the estimated angular position value when the estimated speed is below a first threshold (S1), or with the signal from the sensor when the estimated speed is greater than a second threshold (S2), and a changeover is performed from one signal to the other in a range lying between the first threshold and the second threshold.

Abstract: A method of controlling a machine including at least one inductive coil (n), the inductive coil being connected to a primary electricity power supply network (RP) via a control circuit comprising, between a connection point (A) of the coil (n) in question and terminals of the primary network (RP), at least one half-bridge of a variator adapted to controlling said machine, the half-bridge being formed by first and second controlled switches (T+n, T−n). In the method, connection point (A) of said coil (n) is connected to at least one third controlled switch (Tn−x), the third switch (Tn−x) constituting a bypass switch connected to at least one secondary electricity power supply network (Rx), and the electrical state of the third switch (Tn−x) is associated with that of the half-bridge.