Sliding mode approach applied to sensorless direct torque control of cage asynchronous motor via multi-level inverter  

作　　者：Soukaina El Daoudi Loubna Lazrak Mustapha Ait Lafkih 

机构地区：[1]Laboratory of Automatic,Energy Conversion and Microelectronics,Faculty of Sciences and Technology,Sultan Moulay Slimane University,Beni Mellal,Morocco

出　　处：《Protection and Control of Modern Power Systems》2020年第1期166-175,共10页现代电力系统保护与控制（英文）

摘　　要：To improve the robustness and performance of the dynamic response of a cage asynchronous motor,a direct torque control(DTC)based on sliding mode control(SMC)is adopted to replace traditional proportional-integral(PI)and hysteresis comparators.The combination of the proposed strategy with sinusoidal pulse width modulation(SPWM)applied to a three-level neutral point clamped(NPC)inverter brings many advantages such as a reduction in harmonics,and precise and rapid tracking of the references.Simulations are performed for a three-level inverter with SM-DTC,a two-level inverter with SM-DTC and the three-level inverter with PI-DTC-SPWM.The results show that the SM-DTC method achieves better performance in terms of reference tracking,while adoption of the threelevel inverter topology can effectively reduce the ripples.Applying the SM-DTC to the three-level inverter presents the best solution for achieving efficient and robust control.In addition,the use of a sliding mode speed estimator eliminates the mechanical sensor and this increases the reliability of the system.

关 键 词：Asynchronous cage motor Direct torque control Sinusoidal pulse width modulation Sliding mode control Speed estimator Three-level inverter 

分 类 号：TM4[电气工程—电器]