Brushless doubly-fed motor excitation control system and control method using same

Brushless doubly-fed motor excitation control system and control method using same

CN
  • CN 102,868,346 A
  • Filed: 08/16/2012
  • Published: 01/09/2013
  • Est. Priority Date: 08/16/2012
  • Status: Active Application
First Claim
Patent Images

1. a brushless dual-feed motor exciter control system is characterized in that:

  • comprise PWM rectification unit, the first current sensor, smoothing reactor, contactor, excitation controller and inversion unit, operation and display unit, energy storage device, BOOST reactor, soft starting circuit, the first voltage detecting circuit, second voltage testing circuit;

    First three-phase input end of PWM rectification unit is sequentially connected and is connected the power winding of brushless dual-feed motor behind BOOST reactor, soft starting circuit, the smoothing reactor, the dc output end of PWM rectification unit connects the direct-flow input end of excitation controller and inversion unit by the positive and negative electrode dc bus, excitation controller is connected the control winding of brushless dual-feed motor with the three-phase output end of inversion unit, energy storage device in parallel on the positive and negative electrode dc bus that the dc output end of PWM rectification unit connects;

    The current changing signal of three-phase line between first three-phase input end of the power winding of the voltage change signal of three-phase line and the brushless dual-feed motor that the first current sensor gathers and PWM rectification unit between the power winding of the brushless dual-feed motor that the brushless dual-feed motor tach signal that the signal input part received code device of excitation controller and inversion unit gathers, second voltage testing circuit gather and first three-phase input end of PWM rectification unit;

    Another three-phase input end of PWM rectification unit receives the voltage change signal of three-phase line between first three-phase input end of the power winding of the brushless dual-feed motor that the first voltage detecting circuit gathers and PWM rectification unit;

    Be connected by FPDP between excitation controller and inversion unit and operation and display unit;

    Contactor one end is connected on the three-phase line between smoothing reactor and soft starting circuit, a kind of being connected in the other end and electrical network, electrical load, power supply or the local power net.

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