Patents Assigned to Powertron Limited
  • Power supplies for electrical and electronic equipment
    Patent number: 4769752
    Abstract: A circuit for protecting an AC/DC, DC/AC or DC/DC convertor power supply which is fed from a supply source which may contain spikes or transients, comprising links of relatively lower and higher resistance connected in parallel in the current supply path from the power supply, and a feed back signal generator producing a feed back signal which varies responsively to variations in the power supply and is utilized to change the effective resistance of the low resistance link and thereby limit the current applied to the convertor transformer.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: September 6, 1988
    Assignee: Powertron Limited
    Inventor: Miles D. A. B. Rackowe