×

Hybrid power system

  • US 5,031,086 A
  • Filed: 12/20/1989
  • Issued: 07/09/1991
  • Est. Priority Date: 12/20/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. A hybrid power system which converts variable-frequency power developed by a brushless generator into DC power which is supplied to a DC load and constant-frequency AC power which is supplied to an AC load wherein the generator includes an exciter portion and a main generator portion each having field and armature windings, the exciter portion armature winding being coupled to the main generator portion field winding and the variable-frequency AC power being developed in the main generator portion armature windings, comprising:

  • an AC/DC converter coupled to the main generator portion armature winding for converting the variable-frequency power into the DC power;

    a stepped-waveform inverter coupled to the AC/DC converter for converting the DC power into the constant-frequency AC power including first through sixth three-phase subinverters that produce first through sixth waveforms, respectively, a summing transformer having first through sixth sets of primary windings coupled to the sixth subinverters, respectively, and a set of three-phase secondary windings in which three-phase voltages are produced wherein the third and fourth waveforms are displaced a fixed angle α

    1 relative to the first and second waveforms, respectively, and the fifth and sixth waveforms are displaced a variable angle α

    2 relative to the third and fourth waveforms, respectively;

    means coupled to the exciter portion field winding for supplying current thereto in dependence upon a parameter of the DC power to maintain such parameter substantially at a regulated DC value; and

    means coupled to the stepped-waveform inverter for controlling the angle α

    2 in accordance with a parameter of the constant-frequency AC power to maintain such parameter substantially at a regulated AC value.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×