×

Electric synchronous machine which is excited via rotating rectifiers

  • US 4,591,775 A
  • Filed: 02/12/1985
  • Issued: 05/27/1986
  • Est. Priority Date: 02/17/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. An exciter arrangement for an electric synchronous machine, the synchronous machine having an exciter winding excited via rotating rectifier means from a rotating, Y-connected three-phase winding of an exciter machine, three outputs of the three-phase winding being coupled to the rectifier means, the rectifier means being Y-connected and having a Y-point, the Y-point being coupled to one end of the exciter winding, the other end of the exciter winding being coupled to a central point of the three-phase winding of the exciter machine, auxiliary slip ring means being provided on a rotating shaft of the exciter machine, said auxiliary slip ring means being coupled to said central point of the three-phase winding and being coupled to stationary electrical means by liftable brush means contacting said slip ring means and further including switch means coupled to said brush means, said rectifier means comprising first and second rectifier means for conducting current from said three-phase winding having different current conduction directions, each rectifier means having a Y-point, and further comprising first and second thyristor means coupled between respective Y-points of said first and second rectifier means and one end of said exciter winding, the control electrodes of each of said thyristor means being coupled to voltage sensitive firing means, the auxiliary slip ring means comprising first auxiliary slip ring means coupled to one end of the exciter winding, second auxiliary slip ring means coupled to the other end of the exciter winding, third and fourth auxiliary slip ring means respectively coupled to the Y-points of the first and second rectifier means, fifth and sixth auxiliary slip ring means coupled to the respective control electrodes of the first and second thyristor means,the stationary electrical means comprising d-c voltage source means selectively coupled between the control electrode and the cathode of respective ones of the thyristor means so as to fire the respective thyristor means, capacitor means selectively coupled in parallel across the cathode and anode of each thyristor means, and de-energizing means selectively coupled in parallel with the exciter winding by selected ones of anti-parallel connected diode means.

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