Inhibition of Double PWM Welding Power Supply Voltage Fluctuation of the Intermediate Links

Abstract:

Double PWM welding power source can restrain the net side current harmonic. In order to suppress the transient when the intermediate DC link voltage fluctuation, generally adopt the method of increasing capacitor capacity, the disadvantages of this approach are: slow dynamic response, large volume, low service life, high cost of equipment. Therefore put forward a kind of double PWM welding power source based on feed-forward control power, using the power of feed-forward can effectively inhibit the intermediate DC link voltage fluctuation, based on the control method of the power system has a high power factor, good dynamic performance, simple and easy, good application prospect.

• Periodical: Applied Mechanics and Materials (Volume 734)
• Pages: 897-900
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.734.897
• Online since: February 2015
• Authors: Ji Fang Zhang*, Wei Liu, Shi Wei Sun
• Keywords: Direct Power Control, Double PWM Welding Power Source, Power Feed-Forward

References

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

DOI: 10.1109/pesa.2011.5982937

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