采集瞬时无功作为辅助变量的直接转矩控制

Instantaneous Inactive Power used as Assist Varaiable by MRAS in the DTC System

在参考模型自适应(Model Reference Adap- tive System-MRAS)理论基础上讨论了二种转速观测法,提出了一种以电机的瞬时无功作为辅助变量,鲁棒性良好的新型MRAs速度估汁方案。该方法能较好地解决电机参数变化对调速精度和系统稳定性影响的问题,仿真结果证明了该方案的有效性。

Two kinds of speed observation methods are discussed based on Model Reference Adaptive System （MRAS）in this paper. A new type MRAS speed estimation scheme with motor instantaneous inactive power as assist variable is presented.The method can solve the problems of speed control accuracy and system stability under the influence of motor parameter variation.Simulation results show the feasibility of the proposed strategy.