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Methods and configurations of LC combined transformers and effective utilizations of cores therein

  • US 9,257,225 B2
  • Filed: 07/02/2008
  • Issued: 02/09/2016
  • Est. Priority Date: 07/02/2008
  • Status: Active Grant
First Claim
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1. A species of electric transformer, termed LC combined transformer, used for transferring electric signal or energy of periodic sine wave, and proportionally altering the amplitude(s)/magnitude(s) of current or/and voltage of the periodic sine wave between input and output ports when neglecting power loss,being a current type unity-coupled mutual capacitor characterized as current transformation, or a voltage type unity-coupled mutual capacitor characterized as voltage transformation, or a circuit of LC combined transformer in cascade connection of an ideal transformer plus one current type unity-coupled mutual capacitor or two voltage type unity-coupled mutual capacitors, comprisingsaid current type unity-coupled mutual capacitor consisting of three linear capacitances in delta (Δ

  • ) configuration with a sum of the reciprocals of said three capacitances being zero;

    said voltage type unity-coupled mutual capacitor consisting of three linear capacitances in wye (Y) configuration with a sum of said three capacitances being zero;

    either of said unity-coupled mutual capacitors including negative capacitance(s) which may be realized through negative impedance converter(s) (NIC) or by employing linear inductor(s) when operating at a constant frequency;

    said circuit of LC combined transformer comprising current transformation-A type LC combined transformer consisting of a mutual inductor (Tr), an inductor (Lb) and a capacitor (Cm), if designating the primary winding terminals of said mutual inductor (Tr) as the input port of said current transformation-A type LC combined transformer, said mutual inductor (Tr)'"'"'s secondary winding and said inductor (Lb) and said capacitor (Cm) being connected in series to form a closed loop before designating the two terminals of said capacitor (Cm) as the output port;

    said current transformation-A type LC combined transformer presenting a ratio of current transformation between ports as

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