Abstract: A self-synchronous electrical motor comprises a rotor, a stator formed by stator windings, at least one electronic switch series-connected with a stator winding to control a mean current in the winding, a sensor of the angular position of the rotor to control the working of the switch. This electrical motor also comprises a rotating mechanical commutator or change-over switch device to shunt or route a current given by a power supply source into windings selected as a function of the position of the rotor. The commutator device is interposed in a series circuit formed by the power supply source, the stator windings and the electronic switch. Application to the industry of automobiles using electrical traction.

Abstract: A self-synchronous electrical motor comprises one rotor, one stator formed by at least one set of four stator windings, at least one electronic switch connected to a stator winding to control the current in the stator winding and a sensor of the angular position of the rotor to control the working of the switch. It also has a rotating commutator device, driven by the rotor, to shunt a current coming from a power supply source into windings selected as a function of the position of the rotor. The commutator device is connected to a first end of each of the windings, the second end of two of the windings being connected to the power supply source and the second end of the other two windings being connected to the electronic switch. Application notably to electrical traction systems for automobiles.

Abstract: An electrical traction system notably for automobiles which has (a) at least one recharging supply source; (b) at least one synchronous electrical motor with a stator having a plurality of spatially offset stator windings, a commutating device with choppers for routing a current given by the supply source into the stator winding in order to create a rotating magnetic field, and a rotor; (c) a circuit for charging the supply source including a transformer, which transformer includes the stator windings; and (d) at least one converter for charging an auxiliary battery.

Abstract: A diode assembly having electrodes and a case assembled without soldering or crimping, wherein the electrodes are maintained connected to respective opposite faces of a diode chip by simple intimate contact of electrical and thermal conduction under the permanent action of a pressure exerted by an elastic element. The case is closed by a cover kept solidly in closing position by a simple wedging effect under a continuous thrust exerted by the elastic element.

Abstract: An autosynchronous motor comprises a control and power circuit for the windings of a stator generating a rotating field the angular direction of which is a function of the magnetizing direction of the permanent magnet of the rotor, and to a positioning device producing a signal representing the angular position of the rotor relative to the stator windings. This positioning device emits one pulse per rotation; it comprises a moveable member integral with the rotor and a steady or fixed member integral with the stator.The stator member of the positioning device and the stator comprise complementary means so that this stator member can, by manual operation, be rotated around the axis of the motor. Marking references are provided for predetermined angular positions of the stator member. These complementary means are, for example, on the stator constituted by a ball repelled by a spring and on the stator member by a number of notches equal to the number of pairs of the rotor.

Abstract: The synchronous machine comprises a rotor provided with permanent magnets arranged for orthoradial magnetic induction and which are disposed around the axis in such a way that two adjacent magnets have counter-direction inductions, pole-pieces deviating the said induction so that it becomes radial to the periphery and each of the pole-pieces being formed of half-poles separated by a split pin applying each of the half-poles against the adjacent magnet, and wherein each magnet and each half-pole is in a single block in axial direction, the edges of the flanges ensuring the cohesion in radial direction.

Abstract: A DC-DC converter is provided, for example of the voltage booster type, comprising a switch controlled for chopping the input signal, a transformer whose primary winding receives the chopped signal and a means for rectifying the signal delivered by the secondary winding of the transformer.The switch is in parallel across a series assembly formed by the primary of the transformer and a capacitor. The rectifier means comprises a bridge for rectifying a current flowing in both directions.

Abstract: The connecting device is interposed between a rotating electric machine and a toothed lubricated device of the speed-reducer or multiplier type, this device comprising an output shaft of the electric machine, a screen, for opposing the propagation, towards the electric machine, of eventual lubricant leak in the vicinity of the shaft of the toothed device, closes, on one side, a cavity at the end of the casing of this toothed device and whereby this cavity presents on its lower portion an outlet hole for discharging the lubricant leaks, and the rotating screen presents a cylindrical projection directed towards the inside of the cavity and disposed so as to deviate towards the discharge hole the lubricant particles escaping from the toothed device. Application to the connection of the electric starter with an aeroplane or helicopter motor.

Abstract: An electronic control arrangement which can be used in particular for driving brushless and slip-ringless electric motors and an installation incorporating such an arrangement. The speed of the motor is controlled as a function of one of more items of information such as temperatures for example. For this purpose, a DC control voltage proportional to the items of information received is produced. By combining a mixing arrangement, a processing block, a function generator and a power-amplifier stage it becomes possible to obtain from the output of the arrangement, from a source of DC electrical energy, two sinusoidal voltages of the same amplitude and frequency which are 90.degree. out of phase with one another and whose frequency and amplitude are proportional to the DC control voltage.