电机分级变频系统中转矩脉动的研究  

Torque Ripple Study in the Motor Soft Starting Process with Discrete Variable Frequency Method

作　　者：胡红明[1] 毛承雄[1] 陆继明[1] 袁佑新[2] 

机构地区：[1]华中科技大学湖北省电力安全与高效重点实验室,湖北武汉430074 [2]武汉理工大学自动化学院,湖北武汉430070

出　　处：《电气传动》2009年第8期11-15,27,共6页Electric Drive

基　　金：湖北省科技公关项目(2006AA101B27)

摘　　要：异步电机在额定电压下直接启动时,启动电流大、产生转矩小。采用分级交交变频方法启动,能够减缓甚至避免上述两个问题,但同时产生比较大的转矩脉动。详细分析其原因,首次对分级变频控制策略进行优化,并把功率因数闭环控制引入分级变频控制中,把上述两种方法结合起来控制转矩。用Matlab建立相应仿真模型,仿真结果证实该方法能有效减小转矩脉动,获得比较理想转矩曲线,从而证实理论的正确性和方案的可行性。When the induction motor directly starts up under the nominal voltage, there is a big current and a small torque. It is useful for the discrete variable frequency method to alleviate and even void the above question,and at the same time it exits a big torque ripple. The reason was analyzed in detail, improve the control method and employs the closed power factor loop to alleviate the ripple. The Matlab model was sets up, and the theoretical analysis is the same with the simulation result to prove the method＇s validity and feasibility.

关 键 词：分级变频 转矩脉动 功率因数 闭环控制 仿真模型 

分 类 号：TM573[电气工程—电器]