摘要
传统的基于电动机稳态数学模型的调压调速软起动器在启动电动机方面普遍存在着起动转矩小但电流大,且起动转矩和起动电流非线性的情况.为此,提出了一种以变频调速理论为基础,以电压空间矢量(SVPWM)原理为实现方法,并在深入研究这种以定子磁链轨迹为控制手段和方法的基础上,设计了一种六边形磁链轨迹的电压空间矢量控制策略的新型软起动器.使电压/频率比值相对稳定,保证电机主磁通稳定,在获得较大起动转矩的同时,又保证较小的起动电流.最后对所设计的装置进行了相应的实验测试,测试结果验证了该控制策略的正确性和有效性.
The traditional regulating speed and voltage soft starter based on motor steady-state mathematical model are universal existence in starting torque is small but large current,and the starting torque and starting current nonlinear.Therefore,this paper puts forward a kind of the variable frequency theory as the foundation,based on the theory of voltage space vector（SVPWM） method,and the further study of the stator flux linkage locus as control means and methods,on the basis of design a hexagon flux trajectory of voltage space vector control strategy of a new type of soft starter.The voltage/frequency ratio is relatively stable,the main magnetic flux of motor is stable,at the same time,to achieve a larger starting torque and ensure low starting current.Finally has carried on the corresponding to the designed device experimental test,the test results verify the correctness and effectiveness of the control strategy.
出处
《陕西科技大学学报（自然科学版）》
2017年第2期171-176,共6页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(51577110)
陕西省科技厅工业科技攻关计划项目(2015GY074)
