感應電動機直接轉矩控制中電壓狀態選擇

摘要：　　建立在滯環控制和逆變器電壓狀態選擇基礎上的直接轉矩控制，實現簡單，能提供對電機轉矩轉速的快速動態響應。本文分析了低速運行時定子磁鏈幅值下降的原因，提出一種在傳統狀態選擇基礎上的區段細分策略，較好地改善了定子磁鏈，經計算機仿真效果較好。 敘詞：異步電動機 直接轉矩控制 定子磁鏈 電壓狀態選擇 Abstract：　　DTC based on hysteresis control and inverter voltage state choice can be implemented easily and has fast dynamic response to torque and speed. This paper analyzes the reason for the reduction of stator flux, and presents a strategy of precisely dividing sector based on conventional voltage state choice, improves the stator flux obviously. The simulation results verify the validity of the proposed strategy. Keyword：induction motor direct torque control(DTC) stator flux voltage state choice