基于模糊零矢量永磁同步电机直接转矩控制

Direct torque control of permanent magnet synchronous motor based on fuzzy zero-vector

针对传统永磁同步电机直接转矩控制中的转矩脉动问题,对传统直接转矩控制中产生转矩脉动的机理、零矢量在永磁同步电机直接转矩控制中的作用进行了详细分析。通过采用带零矢量的模糊控制器代替传统的滞环比较器,构建了一种基于模糊零矢量的永磁电机直接转矩控制方法,实现了永磁同步电机磁链和转矩的协同控制,将磁链偏差和转矩偏差进行合理的模糊分级,有效地抑制了转矩脉动,同时保持了直接转矩控制的响应速度快和鲁棒性强的优点。仿真和实验验证了该方法的可行性和有效性。

For the torque ripples in the traditional DTC（Direct Torque Control） of PMSM（Permanent Magnet Synchronous Motor）,its generation mechanism and the function of zero-vector in DTC are analyzed. A new DTC is presented,which uses the controller based on fuzzy zero- vector,instead of traditional hysteresis controller,to realize the coordinative control of flux linkage and torque. The flux linkag error are rationally classified by fuzzy controller,and the electromagnet torque ripples are e error and torque effectively reduced while the DTC advantages of rapid response and strong robustness are kept. Simulative and experimental results verify its feasibility and effectiveness.