Method and device for controlling inverse welding machine without output end feedback

Method and device for controlling inverse welding machine without output end feedback

CN
  • CN 101,791,735 B
  • Filed: 01/08/2010
  • Issued: 09/11/2013
  • Est. Priority Date: 01/08/2010
  • Status: Active Grant
First Claim
Patent Images

1. inverse welding machine without output end feedback control method, this method comprises that primary current detects link (1) and detects behind the transformer primary current Ip one the road and deliver to pulsewidth modulation link (5), another road is delivered to and is obtained welding current feedback signal If after welding current detects link (2) processing, and weldingvoltage detection link (6) is handled the pwm signal of pulsewidth modulation link (5) and obtained weldingvoltage feedback signal Uf;

  • Output characteristics controlling unit (3) detects the welding current feedback signal If of link (2) output according to the given signal Ug of weldingvoltage, the given signal Ig of welding current, welding current and the weldingvoltage feedback signal Uf of weldingvoltage detection link (6) output carries out the control of weldingvoltage current characteristics, and maximum current limit link (4) is carried out the restriction of maximum weld electric current;

    Output characteristics controlling unit (3) produces a pwm control signal and delivers to pulsewidth modulation link (5), and pulsewidth modulation link (5) produces pwm signal according to this control signal and primary current signal;

    It is characterized in that not needing to carry out from the output of electric welding machine the detection of weldingvoltage and welding current.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×