交交变频电流无死区换向控制策略及实现

针对传统的交交变频器的逻辑无环流控制策略存在死区的缺点,在原有的双变量交交变频器自然无环流控制策略的基础上,加入了小电流检测,提出了一种基于双变量的交交变频器电流无死区换向控制策略。并建立了MATLAB/Simulink的仿真模型,进行了仿真分析。最后,搭建了双变量交交变频器电流无死区换向控制的数字化实验平台,做了大量的实验。仿真和实验结果进一步验证了电流无死区换向控制策略的可行性。得出结论:电流无死区换向控制策略可以为交交变频器实现真正的在线连续变频提供依据。

Commutation Control Strategy and Its Implementation for AC/AC Cycloconverter Based on Current without Dead Zone

To overcome the disadvantage of traditional cycloconverter logic without circulation control strategy,control strategy based on double-variables cycloconverter current without dead zone is proposed on the basis of original double-variables cycloconverter natural without circulation control strategy while added the low current detection.A MATLAB/Simulink simulation model is established for simulation and analysis.Finally,a digital experiment platform based on doublevariables cycloconverter current control strategy with no dead zone is set up and a lot of experiments were done.Simulation and experimental results further validate the feasibility of current without dead zone control strategy,hence it comes to a conclusion that using the double-variables current without dead zone control strategy could provide the basis of true online continuous variable frequency for cycloconverter.