【摘要】 在研究无刷双馈电机直接转矩控制调速系统的基础上,改进和优化了常规的直接转矩控制系统的电压矢量开关表。与常规的直接转矩控制系统相比,多增加了1个时间控制量,由转矩、磁链、扇区及时间控制量4个信号共同决定电压矢量开关表。这种改进延长了系统采样时间,在低速范围内可以有效地减小转矩脉动,改善定子的电流波形,且具有良好的动、静态性能。并使用MATLAB对该系统进行了仿真验证。更多还原

【Abstract】 This paper studies the direct torque control of Brushless Doubly-Fed Machine,and presents an improved switching table of inverter voltage vectors.This system adds an additional control variable compared with conventional DTC system.Using this improved switching table,the DTC system can efficiently reduce the torque pulsation compared with the conventional direct torque control system.And the simulation results compared with conventional system show that this strategy is correct.This system also has good dynamic and static performance.更多还原