×

Three-phase inverter arrangement

  • US 4,367,522 A
  • Filed: 03/19/1981
  • Issued: 01/04/1983
  • Est. Priority Date: 03/28/1980
  • Status: Expired due to Fees
First Claim
Patent Images

1. An inverter arrangement for generating a three-phase AC output voltage of the type having three single-phase inverters, each single-phase inverter being connected at an input to a DC voltage source, and at an output to a transformer arrangement by at least one low-pass filter, the arrangement further comprising:

  • first, second, and third single-phase transformers in the transformer arrangement, each of said single-phase transformers having a converter-side winding connected to the low-pass filter, and a network-side winding, said network-side windings of said first, second, and third single-phase transformers being connected to one another in a Y-circuit configuration having a neutral terminal, said neutral terminal being connected to a reference potential;

    first, second, and third phase control means for controlling respective ones of the single-phase inverters, each of said first, second, and third phase control means having a vector-oriented control device coupled to an associated pulse control unit, said pulse control unit having at least one output for providing control pulses;

    vector oscillator means for generating a plurality of reference signals corresponding to a symmetrical three-phase system of reference vectors; and

    first and second input means in each of said vector-oriented control devices, said first input means being adapted to receive a corresponding one of said reference signals of said vector oscillator means, and said second input means being adapted for receiving a measurement signal corresponding in phase to a predetermined one of the three-phase AC output voltages.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×