Patents Assigned to Societe CEM Compagnie ElectroMecanique et Cie
  • Freely commutating chopper circuit
    Patent number: 4424558
    Abstract: The invention relates to a chopper circuit with free commutation for the supply of power to a load from a source of direct current. It comprises a principal thyristor with a return diode, a series resonant circuit as the commutation circuit and a free-wheeling diode. The free-wheeling diode is parallel to the capacitor of the resonant circuit so that the coil serves both as the commutation circuit and the coil to limit variations of the current in the thyristor. The circuit is particularly suitable for use with electric traction motors.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: January 3, 1984
    Assignee: Societe CEM Compagnie ElectroMecanique et Cie
    Inventor: N'Guyen U. Thuy