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Rotorcraft having electrical equipment for regulating electrical power supply to an engine on starting

  • US 10,124,903 B2
  • Filed: 01/07/2016
  • Issued: 11/13/2018
  • Est. Priority Date: 01/08/2015
  • Status: Active Grant
First Claim
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1. A rotorcraft having an electric circuit and at least one turboshaft engine comprising a gas compressor and a turbine, the engine being provided with a starter for driving the gas compressor while starting the engine, the electric circuit being connected via a connection bus to an onboard electricity network for delivering DC to operate the starter under dependency of the electric circuit, the onboard electricity network being maintained at a setpoint voltage during starting by regulating the delivery of electrical energy to the starter by the electric circuit from a main source of electrical energy and a secondary source of electrical energy, the main source of electrical energy for delivering DC to the onboard network, the secondary source operable in first and second modes depending on a bidirectional DC-DC converter:

  • wherein the first mode is a “

    discharge”

    mode of operating the secondary source in which the bidirectional DC-DC converter controls the delivery of electrical energy from the secondary source as a function of a value of at least one parameter identifying progress in starting the engine, such that additional electrical energy is delivered by the secondary source to the onboard network while starting the engine to supplement the electrical energy supplied to the onboard network by the main source; and

    wherein the second mode is a “

    recharging”

    mode of operating the secondary source in which the bidirectional DC-DC converter regulates recharging of the secondary source from the onboard network with electrical energy supplied by the main source;

    the secondary source of the electric circuit is connected in parallel with the main source, wherein the secondary source comprises a discharge module having a plurality of discharge members that are connected in series;

    the discharge module being connected in series with the electric circuit via the bidirectional DC-DC converter;

    the bidirectional DC-DC converter being a main static converter comprising at least an electrical power architecture and an N phase chopper with phases mutually shifted by 2π

    /N; and

    a regulator device comprises a primary regulation loop and controls the operation of the electrical power architecture of the main static converter, at least by maintaining current equivalence between a current of the electric circuit and a current of the onboard network, regardless of the mode of operation of the discharge module and by monitoring the voltage of the discharge module and the voltage of the onboard network.

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