永磁同步电动机直接转矩控制系统研究

针对永磁同步电动机控制中存在低速时转矩脉动问题,对脉动问题形成的具体原因进行了探讨,详细介绍了永磁电机直接转矩控制理论,描述了常规永磁同步电动机直接转矩控制系统矢量选择方法和存在的不足,结合实际应用情况,提出了增加电压矢量的三电平逆变器控制方案,并给出了控制系统的结构图和数学模型。通过仿真分析,结果表明了该方案提高控制系统的性能,有效减小电机的电磁转矩脉动。

Research on Direct Torque Control System of Permanent Magnet Synchronous Motors

To solve the problem of torque ripple in PMSMs when at low speed,reasons that caused the problem were investigated and the direct torque control theory was presented.Then the vector selection methods and their shortcomings in the conventional permanent magnet synchronous motor direct torque control system.Base on the practical application,a three-level inverter control scheme was proposed to increase the number of voltage vector and the control system structure and the mathematical model were proposed.Simul...