【摘要】 对传统的交流异步电动机直接转矩控制产生的转矩脉动进行了详细分析,并在此基础上提出了新型的转矩和磁链区域电压矢量表以改进系统性能。之后又在区域电压矢量表的基础上,进一步提出了两种转矩和磁链预测直接转矩控制策略来减小低速转矩脉动,提高系统的稳态性能。最后通过仿真和实验验证了所提出的算法的实用性和优越性。更多还原

【Abstract】 The reasons of periodic torque ripples resulted by conventional direct torque control (DTC)of induction motor are discussed in detail. A new torque and flux area voltage control table is proposed based on the discussion to improve the performance of DTC. Based on the area voltage vector table, two predictive control strategies of torque and flux are proposed, which is used to reduce the torque ripples in low speed range and improve the steady performance of system. Finally, simulations and experiments are made, showing the validity of these strategies.更多还原