Patents by Inventor Heinrich J. Boenig

Heinrich J. Boenig has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Adjustable direct current and pulsed circuit fault current limiter
    Patent number: 6624993
    Abstract: A fault current limiting system for direct current circuits and for pulsed power circuit. In the circuits, a current source biases a diode that is in series with the circuits' transmission line. If fault current in a circuit exceeds current from the current source biasing the diode open, the diode will cease conducting and route the fault current through the current source and an inductor. This limits the rate of rise and the peak value of the fault current.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: September 23, 2003
    Assignee: The Regents of the University of California
    Inventors: Heinrich J. Boenig, Josef B. Schillig
  • Fault current limiter and alternating current circuit breaker
    Patent number: 5726848
    Abstract: A solid-state circuit breaker and current limiter for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: March 10, 1998
    Assignee: The Regents of the University of California
    Inventor: Heinrich J. Boenig
  • Superconducting magnetic energy storage for asynchronous electrical systems
    Patent number: 4599519
    Abstract: A superconducting magnetic energy storage coil connected in parallel between converters of two or more ac power systems provides load leveling and stability improvement to any or all of the ac systems. Control is provided to direct the charging and independently the discharging of the superconducting coil to at least a selected one of the ac power systems.
    Type: Grant
    Filed: May 16, 1984
    Date of Patent: July 8, 1986
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Heinrich J. Boenig
  • Solid-state circuit breaker with current limiting characteristic using a superconducting coil
    Patent number: 4490769
    Abstract: A thyristor bridge interposes an ac source and a load. A series connected DC source and superconducting coil within the bridge biases the thyristors thereof so as to permit bidirectional ac current flow therethrough under normal operating conditions. Upon a fault condition a control circuit triggers the thyristors so as to reduce ac current flow therethrough to zero in less than two cycles and to open the bridge thereafter. Upon a temporary overload condition the control circuit triggers the thyristors so as to limit ac current flow therethrough to an acceptable level.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: December 25, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Heinrich J. Boenig
  • Superconducting VAR control
    Patent number: 4348630
    Abstract: Static VAR control means employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: September 7, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Heinrich J. Boenig, William V. Hassenzahl