A Study on Variable Frequency Control of Precooling Pump Motors

Abstract:

Based on the energy-saving principle of variable frequency and energy adjustment, problems on application of the optimization table method of voltage vector in AC frequency control of motor speed adjusting are mainly emphasized by analysis on precooling system of air separation in this paper. With the help of Matlab/Simulink simulation software, the simulation model of the control system of the AC induction motor is built, and a method of frequency and speed adjusting control of the motor based on dsPIC is put forward. Furthermore, this technology is applied in the precooling pump system of air separation, and a full digital SPWM variable frequency and speed adjusting system with low energy consumption, high efficiency and good dynamic is constructed.

• Periodical: Applied Mechanics and Materials (Volumes 325-326)
• Pages: 1233-1236
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.325-326.1233
• Online since: June 2013
• Authors: Xing Jin, Chang Hong Jiang, Xiang Guang Li
• Keywords: Air Separation System, Variable Frequency Control, Voltage Vectors

References

[1] Zhi-zhong: Preliminary study on nergy-saving modification with frequency-conversion speed adjustment in precooling water pump electromotor. Cryogenic Technology[J],2006,1:44-46.

[2] Wang Shenghui, Jin Xing, Tian Wei: A Research on the Methods of Forecasting and Controlling for Air Compressor. The international comference on electrical and control engineering[C], 2010.6: 240-243.

DOI: 10.1109/icece.2010.1412

[3] Wang Guang-yun, Jia Yu-jing: Application of Fre-quency Conversion Timing and Flux Control of Pump. Coal Mine Machinery[J], 2007,28(1):155-156.

[4] Wang Yan, Du Jun-hong, Tao Wei-yi, Chen Yong-xiao: Study of SVPWM based on DSP. Electric machines and control, 2000, 6(4): 98-101.

[5] Lang Baobua, Liu Weiguo,Zhou Xiwei: Direct torque control system of permament magnet synchronous motor based on the strategy of reference statou flux linlage and voltage space vector modulation. Electric Drive [J], 2007(7):21-25.

[6] Wu Yong-Sheng: Applicatiion of DSP AC Motor's Frequency Control System in Water Pump. SCI/TECH Information Development & Economy. 2004,14(1):226-231.

[7] He Li-Gao: dsPIC30F Motor and Power series digital signal controllers Principles and Applications. Beijing:Beijing University of Aeronautics and Astronautics Press. 2007, 4:553-554.

[8] Liu Huan, Fan Hou-shi: Simlation of induction motor vector control system based on Matlab/simulink. Chinese Journal of Scientific Instrument, 2006, 27(6).