Thyristor jumper trigger circuit with negative resistance characteristics

Thyristor jumper trigger circuit with negative resistance characteristics

  • CN 1,291,817 B
  • Filed: 10/11/1999
  • Issued: 06/02/2010
  • Est. Priority Date: 10/11/1999
  • Status: Active Grant
First Claim
Patent Images

1. thyristor jumper circuits for triggering comprise voltage detecting loop and current drives loop, it is characterized in that the first resistance (R 1) and the second resistance (R 2) be composed in series the voltage detecting loop, be connected across the overvoltage two ends (AO) that are monitored;

  • Second resistance (the R 2) on voltage U BOBe detection voltage, the input in current drives loop is the B end;

    The current drives loop is by voltage-stabiliser tube (V 1), photoisolator (V 2), the 4th resistance (R 4), the 5th resistance (R 5), the first diode (D 1), the second diode (D 2), the 3rd diode (D 3) form;

    Photoisolator (V 2) triode be connected to voltage-stabiliser tube (V 1) two ends, and photoisolator (V 2) the luminous tube string in the current drives loop, an end and voltage-stabiliser tube (V 1) link to each other the other end and the 3rd diode (D 3) join the 3rd diode (D 3) the control of negative electrode and thyristor (SCR) extremely link to each other, constitute the current drives loop;

    First, second series diode (D in order to the clamp current limliting 1, D 2) be parallel to photoisolator (V 2) the luminous tube two ends, in order to the 4th resistance (R that leaks 4) be connected to photoisolator (V 2) the luminous tube two ends;

    The 3rd diode (D in order to anti-back-pressure 3) be connected on photoisolator (V 2) between the control utmost point (G) of luminous tube and thyristor (SCR).

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