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Neutral forming circuit

  • US 4,922,400 A
  • Filed: 08/03/1989
  • Issued: 05/01/1990
  • Est. Priority Date: 08/03/1989
  • Status: Expired due to Fees
First Claim
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1. A neutral forming circuit which develops a neutral voltage relative to an AC voltage produced at an output frequency by an inverter coupled to first and second DC link conductors, comprising:

  • first and second impedances coupled together at a junction to form a series combination which is coupled across the DC link conductors; and

    a third impedance coupled between the junction and a neutral terminal at which the neutral voltage is formed, the first through third impedances forming a resonant circuit having a resonant frequency substantially equal to the output frequency of the inverter.

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