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The application of common DC bus in the speed control system of 3900/450 fluting base paper machine

ZHANG Pan-feng, MENG Yan-jing, LI Qi, DANG Hong-she (School of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xianyang 712081, Shaanxi, China)  
Common DC bus is mainly composed of rectification and inverter unit, with which three-phase alternating current becoming into fixed power direct current, then direct current is again converted into frequency and voltage adjustable alternating current by inverter to control motor speed.The constitution, theory and advantage of common DC bus are firstly introduced, the application of variable frequency control system in the speed of 3900/450 m/min fluting base paper machine based on common DC bus is finally introduced. The control system shows it has the feature of little device maintaining, minor space and economizing on electricity compared with traditional single transmission system in paper machine, and has large practical application value.
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