关断角控制在交流电机节电运行中的应用  

Application of hold-off angle control in the power saving operation of three phase asynchronous motor

作　　者：张有兵[1] 王维[1] 谢路耀[1] 吴寒 戚军[1] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310023 [2]诺基亚通信系统技术(北京)有限公司浙江分公司,浙江杭州310052

出　　处：《浙江工业大学学报》2016年第5期473-477,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(51407160);浙江省自然科学基金资助项目(LY16E07005;LQ14E07001)

摘　　要：对于长期运行在负载变化大、平均负载率低的电机,会造成巨大的电能消耗.采用降压节能的方法,通过晶闸管调压电路,适当地减少电机端电压,从而达到在不改变电机转速以满足特定工况转速要求的情况下减少不必要的电能消耗的目的.为了避免电机震荡现象,采用以电流关断时刻为基准的晶闸管关断角控制方法,通过理论分析及建模仿真,证实了该方法在节电运行中的可行性.结合模糊控制,提出了关断角模糊控制方法,并研制节电装置样机进行了实验验证.结果表明:关断角控制策略是正确有效的,能够使电机稳定运行,不出现震荡现象,所采用的模糊控制方法能较好地响应负载变化.通过对比是否使用节电装置所消耗的功率情况,得出该节电装置具有较好的节电效果,在空载运行时效果最佳.It will cause great power consumption when three phase asynchronous motors run in the condition of load changing in a wide range and average load rate in low levwl.Method of depressurizing and saving energy can be used.Through the thyristor voltage regulator circuit,the motor terminal voltage is appropriately reduced and the purpose of reducing unnecessary power consumption will be achieved on the specific working condition which requires constant speed.In order to avoid motor oscillation,a method of hold-off angle based on the current zerocrossing time as reference is used.The method is proved to be feasible in the saving operation through theoretical analysis and simulation.Combining with fuzzy control,a method of hold-off angle fuzzy control is proposed. The energy-saving devices prototype is developed for experimental verification.The experiment results show that the method of hold-off angle control is correct and effective.This method makes motors run stably and avoid motor oscillation.The method of hold-off angle fuzzy control will response to load changes appropriately.The device has good effect on power saving when motors run in the no-load condition.

关 键 词：三相异步电机 关断角 模糊控制 晶闸管 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]