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Charging system for reducing harmonic wave and fabricating cost

  • US 9,236,755 B2
  • Filed: 09/11/2012
  • Issued: 01/12/2016
  • Est. Priority Date: 05/17/2012
  • Status: Active Grant
First Claim
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1. A charging system for charging a chargeable battery, said charging system comprising:

  • a phase-shifting transformer comprising a three-phase primary winding assembly and plural three-phase secondary winding assemblies, wherein after a three-phase AC input voltage is received by said three-phase primary winding assembly, said three-phase AC input voltage is decreased into plural three-phase AC output voltages, and said plural three-phase AC output voltages are outputted from respective three-phase secondary winding assemblies, wherein there is a phase-shifting angle between any two of said plural three-phase AC output voltages; and

    a converting unit electrically connected with said phase-shifting transformer, and comprising plural three-phase rectifying circuits and a DC-DC converting circuit, wherein said plural three-phase AC output voltages are rectified by said three-phase rectifying circuits, and said rectified voltage is converted into a DC charging voltage to charge said chargeable battery;

    wherein said three-phase AC input voltage has a medium-high voltage level in a range between 1.2 KV and 22 KV.

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