STARTER-GENERATOR CONTROL DEVICE


PURPOSE

     The starter-generator control device is developed by order of Innovative Power Solutions (IPS) LLC company (USA) and designed for primary speedup of aircraft turbine and control excitation at standing and rotating turbine to control torque and generated voltage, respectively.

     Stator control device could be used for speedup gas turbine generators and diesel power stations of different capacity.

OPERATION PRINCIPLE

     Starter-generator is the 6-phased machine consisting of two 3-phase windings with offset at 30 electrical degrees. This approach provides low level of output voltage pulsation in generator mode. In stator mode, all the 6 phases are operating that requires availability of two 3-phase converters. Flow-chart of stator is operated in the synchronous mode to provide the maximal correlation of torque to current. In stator mode, the control device functions for speeding up of turbine from zero speed up to 5,000 rpm (40% of full speed) with maximally possible torque.



     The start-up begins from closing of start-up contactor with controller of gas turbine engine. The power is supplied, startup controller closes the generator excitation relay (start position) providing stability of frequency and voltage; source of starter-generator current in insulated; impulses have rectangular shape. The supplied voltage provides level of current equal to 100% of full load necessary for generator operation mode at 7000 rpm. The power converter provides rectangular shape of current with sustaining of amplitude by through-type current regulator. Orientation of phases is detected with armature position sensor that guaranteed continuous synchronous work during the entire start-up. When the start is completed successfully, the start-up contactor is open, and starter-generator begins operation as generator.

OPERATION PRINCIPLE

  • Stator capacity up to 50 kW
  • Power dissipation:
         - Generator mode: 30 W max.
         - Stator mode: 2000 W max
  • Cooling – natural
  • Dimensions of field and control unit 250 x 200 x 150 mm
  • Unit weight 6 kg.


    • Speed, Rpm Torque, Nm Capacity, hp Capacity, kW Measured DC value of generator, А Phase current, 3 phases, А Phase current, 6 phases, А
    0 60.0 0.00 0.00 2131 1662 831
    1000 51.6 9.82 7.33 1832 1429 715
    2000 43.2 16.45 12.27 1534 1197 598
    3000 34.8 19.88 14.83 1236 964 482
    4000 26.4 20.11 15.00 937 731 366
    5000 18.0 17.14 12.78 639 499 249
    5750 11.7 12.81 9.56 415 324 162


    The starter control device cold be used for speedup of:

         1. aircraft turbines;

         2. gas turbine units;

         3. diesel power stations of different capacity.