Patents Assigned to Techmarex (Properietary) Limited
  • Generator with inherent overload limiting
    Patent number: 4992687
    Abstract: A dynamo in the form of a 3 phase welding generator. One stator winding has an in-phase excitation winding feeding the rotor through slip rings. This configuration allows for inherent short-circuit protection as the stator core under short-circuit saturates and prevents rotor excitation, a shaft-mounted fan cools inner and outer surfaces of a tubular heat sink that surrounds the generator and holds a diode-resistor bank.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: February 12, 1991
    Assignee: Techmarex (Properietary) Limited
    Inventor: Gert Nel