Now showing items 1-2 of 2

    • Asymmetrical interleaving strategy for multi-channel power converters 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Wang, Chung-Hsing Hsuan; Xu, Ming Gang (United States Patent and Trademark Office, 2010-06-29)
      In a power converter having m=two or more channels of power factor correction (PFC) circuits connected in parallel and an electromagnetic interference (EMI) filter connected in series therewith, phase shifts in switching ...
    • Discharge lamp lighting control device 

      Virginia Tech Intellectual Properties, Inc.; Matsushita Electric Works, Ltd.; Lee, Fred C.; Eriguchi, Hiroyasu; Okawa, Masanao; Zhou, Jinghai; Jiang, Yan; Tran, Dung A. (United States Patent and Trademark Office, 2008-06-24)
      A discharge lamp lighting control device (100) having a DC power converter, a power factor improving power converter (1), a polarity reversing circuit (2), a starter circuit (3), and a controller (4). The power factor ...