Research on a Welding Power Supply Based on Double PWM Power Feedforward

Abstract:

The double PWM welding power supply which can inhibit network side current harmonics,in order to suppress the transient intermediate DC link voltage fluctuations in large, by increasing the DC capacitor capacity its weaknesses are: slow dynamic response, equipment of large volume,high cost, low life.This paper presented a welding power supply double PWM power based on feedforward control, voltage fluctuation suppression intermediate DC link power using feedforward strategy is feasible. Power system composed of this control method has the advantages of small size capacitor , high power factor, good dynamic performance,simple and feasible,and has application prospect.

• Periodical: Advanced Materials Research (Volumes 1070-1072)
• Pages: 1874-1878
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1874
• Online since: December 2014
• Authors: Wei Liu, Ji Fang Zhang, Shi Wei Sun, Qing Chang Ji
• Keywords: Direct Power Control, Double PWM Inverter Welding Power Source, DSP

References

[1] Chongwei Zhang, Xing Zhang: PWM rectifier and its control, edtied by China Machine Press (2003).

[2] Huli Niu: Research on power harmonic suppression of welding, edited by Tianjin University, Tianjin(2005).

[3] Mingshui Li, The dual PWM converter direct load power feedforward control edited by Tianjin University, Tianjin (2011).

[4] Mingshui Li, Jianru Wang, Guangye Li: Research on power feedforward control strategy of PWM rectifier, The 4th International Conference on Power Electronics Systems and Applications, PESA 2011, HongKong, China (2011).

DOI: 10.1109/pesa.2011.5982937

[5] Guangxian Zhang: The principle and design of inverter welding machine, published by China Machine Press, Beijing(2008).

[6] Kai Sun, Daning Zhou, Mei Yang: Matrix converter technology and Application, published by China Machine Press, Beijing(2007).