Patents Assigned to ABB Energi AS
  • Arrangement in a current detection circuit
    Patent number: 5432439
    Abstract: The present invention relates to an arrangement in a current detection circuit. There is a primary coil for the current to be detected, a separate transformer core which is influenced by the current of the primary coil, a secondary coil conducting a transformed secondary current, as well as a tertiary coil connected to an operational amplifier including a feedback resistor and constituting a current-voltage converter circuit with an input resistance of nearly zero ohms.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: July 11, 1995
    Assignee: ABB Energi AS
    Inventor: Geir Svoen