Now showing items 1-3 of 3

    • Control system and method for a universal power conditioning system 

      Virginia Tech Intellectual Properties, Inc.; Lai, Jih-Sheng; Chen, Chien-Liang; Park, Sung Yeul (United States Patent and Trademark Office, 2014-09-02)
      A new current loop control system method is proposed for a single-phase grid-tie power conditioning system that can be used under a standalone or a grid-tie mode. This type of inverter utilizes an inductor-capacitor-inductor ...
    • Hybrid switch for resonant power converters 

      Virginia Tech Intellectual Properties, Inc.; Lai, Jih-Sheng; Yu, Wensong (United States Patent and Trademark Office, 2014-09-09)
      A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction ...
    • Soft switched three-phase boost rectifiers and voltage source inverters 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Jiang, Yimin (United States Patent and Trademark Office, 1997-05-27)
      A boost rectifier is provided with an ultra high speed diode in its direct current rail to reduce diode reverse recovery loss with or without implementing a soft switching technique. Full zero-voltage-transition (ZVT) as ...