离散变频软启动器的研究
|
摘要
针对普通软起动器无法满足重载应用场合大转矩起动需求的问题,通过对离散变频理论的深入研究分析,提出了一种离散变频软起动控制方法。搭建仿真模型,仿真结果表明该控制方法可有效降低电动机初始起动电流,同时大幅提高初始起动转矩。在理论分析及仿真基础上,研制了一台基于离散变频控制方法的软起动样机,试验结果与仿真结果相符,再次验证了该方法的有效性及正确性,该控制方法有效改善了软起动的起动性能,具有重要的经济技术价值。
Aiming at the problem that ordinary soft starter can not meet the requirement of large torque startup in heavy load applications, a discrete frequency conversion soft start control method was proposed through in-depth analysis of discrete frequency conversion theory. The simulation model was built and the simulation results show that the control method can effectively reduce the initial starting current of the motor and significantly increase the initial starting torque at the same time. Based on the theoretical analysis and simulation, a soft-start prototype which based on discrete frequency control method was developed. The experimental results are in accordance with the simulation results. The validity and correctness of the method are verified again. The control method can effectively improves the start-up performance of the soft satrer,also has important economic and technical value.
Aiming at the problem that ordinary soft starter can not meet the requirement of large torque startup in heavy load applications, a discrete frequency conversion soft start control method was proposed through in-depth analysis of discrete frequency conversion theory. The simulation model was built and the simulation results show that the control method can effectively reduce the initial starting current of the motor and significantly increase the initial starting torque at the same time. Based on the theoretical analysis and simulation, a soft-start prototype which based on discrete frequency control method was developed. The experimental results are in accordance with the simulation results. The validity and correctness of the method are verified again. The control method can effectively improves the start-up performance of the soft satrer,also has important economic and technical value.
引文
[1] Ginart A,Esteller R,Maduro A,et al.High Starting Torque for AC SCR Controller[J].IEEE Transactions on Energy Control,1999,14(3):553-559.
[2] 辜承林,陈乔夫,熊永前.电机学[M].武汉:华中科技大学出版社,2001.
[3] 林渭勋.现代电力电子电路[M].北京:浙江大学出版社,2002.
[4] 佘致廷,刘志星,董璞.基于MATLAB动态仿真模型的高转矩软起动器研究[J].电气传动自动化,2003(3):14-17.
[5] 徐甫容.分级交-交高转矩软起动器的原理和实现[J].电工技术,2004(12):1-5.
[6] 赵凯岐,王毅,徐殿国.晶闸管控制的感应电机中提高起动电磁转矩的一种新策略[J].中国电机工程学报,2004(3):145-150.
[7] 李冬辉,段克亮,马跃贤.离散变频软起动过程的若干问题[J].天津大学学报,2007,40(9):1060-1065.
[8] 王玉峰,马广程,王常虹.晶闸管控制感应电机起动过程中振荡现象研究[J].电机与控制学报,2002,6(3):186-190.
[9] 孙津济,房建成,王建民.异步电动机软起动过程中的振荡[J].电工技术学报,2007,22(2):16-17.
[10] 王毅,赵凯岐,徐殿国.电机软起动控制系统中功率因数角的研究[J].中国电机工程学报,2002,22(8):82-87.
[11] 潘晓晟,郝世勇.电动机仿真精华50例[M].北京:电子工业出版社,2007.
[2] 辜承林,陈乔夫,熊永前.电机学[M].武汉:华中科技大学出版社,2001.
[3] 林渭勋.现代电力电子电路[M].北京:浙江大学出版社,2002.
[4] 佘致廷,刘志星,董璞.基于MATLAB动态仿真模型的高转矩软起动器研究[J].电气传动自动化,2003(3):14-17.
[5] 徐甫容.分级交-交高转矩软起动器的原理和实现[J].电工技术,2004(12):1-5.
[6] 赵凯岐,王毅,徐殿国.晶闸管控制的感应电机中提高起动电磁转矩的一种新策略[J].中国电机工程学报,2004(3):145-150.
[7] 李冬辉,段克亮,马跃贤.离散变频软起动过程的若干问题[J].天津大学学报,2007,40(9):1060-1065.
[8] 王玉峰,马广程,王常虹.晶闸管控制感应电机起动过程中振荡现象研究[J].电机与控制学报,2002,6(3):186-190.
[9] 孙津济,房建成,王建民.异步电动机软起动过程中的振荡[J].电工技术学报,2007,22(2):16-17.
[10] 王毅,赵凯岐,徐殿国.电机软起动控制系统中功率因数角的研究[J].中国电机工程学报,2002,22(8):82-87.
[11] 潘晓晟,郝世勇.电动机仿真精华50例[M].北京:电子工业出版社,2007.