TY - GEN
T1 - Digital control of double- pulsed gas metal arc welding machine
AU - Sha, Deshang
AU - Liao, Xiaozhong
PY - 2009
Y1 - 2009
N2 - In this paper, a fully digitalized phase-shifted full-bridge PWM gating signals generation based on symmetrical carrier is proposed. To make wire feeder vary synchronously with the output current of DC/DC converter, double closed loop control is implemented by DSP . Besides, to improve the dynamic response of wire feeder, power stage for the motor is made up of a buck converter cascaded with a full-bridge inverter . A triple closed loop control model with full digital control is also presented to achieve double-pulsed GMAW process. The control model also contains stick-out length compensation, arc length regulation and instantaneous current control. Flexibility and reliability of the proposed control strategy for DP-GMAW implemented by two DSPs are validated by welding experimental results of 20kW prototype.
AB - In this paper, a fully digitalized phase-shifted full-bridge PWM gating signals generation based on symmetrical carrier is proposed. To make wire feeder vary synchronously with the output current of DC/DC converter, double closed loop control is implemented by DSP . Besides, to improve the dynamic response of wire feeder, power stage for the motor is made up of a buck converter cascaded with a full-bridge inverter . A triple closed loop control model with full digital control is also presented to achieve double-pulsed GMAW process. The control model also contains stick-out length compensation, arc length regulation and instantaneous current control. Flexibility and reliability of the proposed control strategy for DP-GMAW implemented by two DSPs are validated by welding experimental results of 20kW prototype.
UR - https://www.scopus.com/pages/publications/77951131519
U2 - 10.1109/IPEMC.2009.5157839
DO - 10.1109/IPEMC.2009.5157839
M3 - Conference contribution
AN - SCOPUS:77951131519
SN - 9781424435562
T3 - 2009 IEEE 6th International Power Electronics and Motion Control Conference, IPEMC '09
SP - 2573
EP - 2576
BT - 2009 IEEE 6th International Power Electronics and Motion Control Conference, IPEMC '09
T2 - 2009 IEEE 6th International Power Electronics and Motion Control Conference, IPEMC '09
Y2 - 17 May 2009 through 20 May 2009
ER -