Abstract: A regulator device for charging a battery from an alternator that delivers a rectified voltage including a ripple component. The device is of the type including a regulator circuit acting on the mean value of the rectified alternator voltage and includes a circuit for obtaining the main value, a threshold comparator, a time delay circuit, and a power stage for controlling the current flowing through the excitation winding of the alternator. According to the invention, the device includes a negative feedback circuit between a point downstream from the time delay circuit, and the input to the circuit for obtaining the mean value. The device also shifts the mean value downwards during periods when the excitation current is decreasing. The device is particularly applicable to increasing the frequency of regulation under a heavy load.

Abstract: The invention relates to a regulator device for charging a battery by an alternator that delivers a rectified voltage including a ripple component. The device is of the type comprising a regulator circuit acting on the mean value of the rectified alternator voltage and a regulator circuit acting on the voltages of the positive peaks of the ripple component. The regulator circuits are powered by a stabilized voltage derived from the rectified alternator voltage and the device further comprises a power stage for controlling the excitation current of the alternator. According to the invention, the device further includes a regulator circuit acting on the values of the negative peaks of the ripple component. This regulator circuit is also powered by the stabilized voltage, and capable of causing the excitation current to be reduced whenever the voltage of the negative peaks falls below a given threshold.

Abstract: A coil including a closed magnetic circuit (1), constituted by metal sheets which are stamped and stacked, so as to form a first part (12) which is U-shaped, of which one of the portions (12a) is stamped with a chamfered edge (12b), a second part (13), which is L-shaped, has a portion (13a) stamped with a chamfered edge (13b) such that after an insulating housing (6) containing the primary (4) and secondary (5) windings has been located on the arm (8) and a permanent magnet (2) has been inserted between the chamfers (12b and 13b) the first and second parts (12 and 13) are made rigid, by means of rivets (14, 15) and extensions (9b) of the metal plates (9) constituting a shunt circuit for magnetic flux created by the primary winding (4).