【摘要】 提出一种应用于直接转矩控制(DTC)系统的定子电阻压降补偿方法,可消除低速区间定子电阻上的压降。DTC包括转矩和磁链的控制环节、最佳开关矢量表和电动机模型3个基本环节。分析了定子坐标系下交流电动机模型及带有压降补偿器的磁链观测器,论述了定子压降补偿的实现,由Matlab软件包中的Simulink实现仿真;采用TMS320LF2407作控制器,在0.37 kW鼠笼式电动机上做实验后,结果证明所提方法的有效性。更多还原

【Abstract】 A stator resistance voltage-drop compensation method is presented to eliminate the stator resistance voltage-drop at low speed in DTC(Direct Torque Controlled) system.Three parts are involved:the hysteresis of torque and flux,the optimal switching vector table and the motor model.The AC motor model under stator coordinates is discussed,as well as the flux observer with voltage-drop compensator is analyzed.The realization of compensation is simulated with Simulink of Matlab.Taking the TMS320LF 2407 as the controller,a test is carried out on a 0.37 kW squirrel-cage motor,and results show its effectiveness.更多还原