Auxilec

Thomson-csf

Georges Arnaud

Claude Jacques

Leon P Robin

Bertrand Remy

Jean L Meyzonnette

Jean-Claude Soroka

Pascal Besnier

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.

Self-synchronous motor and electrical traction system using a

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.

Self-synchronous electrical motor

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.

Electrical traction system integrating the motor and brake generator

Laser telemetry and Doppler measurement apparatus using pulse compression has a transmitter for providing a periodic pulsed transmission laser wave having a pair of pulses, one pulse being frequency modulated on one side of a main frequency F.sub.E, and the other pulse being frequency modulated on the other side of the main frequency F.sub.E. The transmitter also provides a reference laser wave having a frequency F.sub.L. A photomixer is adapted for superheterodyne reception of the reference laser wave and a return laser signal which has been reflected from a target. The return laser signal has a Doppler shift frequency F.sub.D. The photomixer provides a beat signal having a frequency F.sub.I plus F.sub.D, where F.sub.I is an intermediate frequency. A Doppler aquisition loop transposes the beat signal frequency and provides a transposed signal to compensate for the Doppler shift. The Doppler acquisition loop provides a coarse compensation signal having a frequency near the frequency F.sub.D. Under target tracking conditions, the Doppler acquisition loop then provides an automatic fine compensation signal which compensates for the Doppler difference .DELTA.F.sub.D which exists between the compensation signal frequency and the Doppler shift frequency. Receiving and processing means then receive the transposed signal and provide an output signal indicative of the distance to the tracked target and the Doppler shift frequency of the target.

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Orsay, France

Georges Arnaud