With Permeability Tuning Means Patents (Class 333/179)
  • Patent number: 9934186
    Abstract: An intelligent connector is disclosed having a signal processing unit, a first port, and a second port. The signal processing unit communicates signals between a bus and a slave module. The first port is coupled between the bus and the signal processing unit, and is connected to a power supply line. The second port is coupled between the signal processing unit and the slave module, and is positioned to provide a power supply to the slave module.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: April 3, 2018
    Assignee: Tyco Electronics (Shanghai) Co. Ltd.
    Inventors: Mingjie Fan, Yuming Song, Junying Liu, Yulin Feng
  • Patent number: 8022575
    Abstract: Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of generators and consumers. The controller for damping such oscillations includes a phasor measurement unit (PMU) and a power oscillation damper (POD) controller. Each oscillating mode signal is damped and then superposed to derive a control signal. A feedback controller is used to feedback the control signal to a power flow control device in the power system.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: September 20, 2011
    Assignee: ABB Research Ltd
    Inventors: Petr Korba, Mats Larsson
  • Patent number: 5780939
    Abstract: A method and an apparatus can determine the orders (z) of non-characteristic harmonic currents (Ih) of a second power supply grid, which is coupled to a first power supply grid using an HVDCT system. The apparatus and method also compensates for these non-characteristic harmonic currents (Ih), which are produced as a result of distortion (Uh) of the supply voltage (U1) which exists in the first grid because of a low-frequency harmonic and passes through the short coupling. The order (n) of the existing non-characteristic harmonics is determined by a voltage and/or current measurement of the voltage (U1) of the grid, from which order (n) the order (z) of the generated non-characteristic harmonics in the second grid is determined by a provided voltage-symmetry signal (SMG). This order (z) is supplied to filter logic of a compensation system. The energy quality is thus considerably improved, particularly in the case of grids which are not rigid.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: July 14, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Norbert Christl, Peter Lutzelberger, Kadry Sadek