基于直接反馈线性的永磁同化步电机直接转矩控制

文中应用一种基于直接反馈线性化（DFL）理论的非线性控制方法．通过对系统输出变量进行李微分，得到反馈线性化所需的坐标变换和非线性系统状态反馈．实现了永磁同步电机系统的输入输出线性化．并将原系统分解为两个线性子系统：转速线性子系统和励磁电流线性子系统，实现了系统的解耦。仿真结果表明：基于直接反馈线性化解耦的永磁同步电机直接转矩控制系统具有较好的速度跟踪性能并提高了系统对电流扰动的鲁棒性。

Direct Torque Control of Permanent Magnet Synchronous Motor Based on Direct Feedback Linearization

A nonlinear control methodology based on direct feedback linearization （DFL） was employed in this paper. The appropriate coordinate transformation and nonlinear state feedback were obtained by Lie derivatives for system output variable, with which the input- output of PMSM system was linearized. Furthermore, the PMSM system was decomposed into two linear subsystem, d axis flux subsystem and rotation speed subsystem. The completely dynamic decoupling was realized. Simulation results show that the permanent magnet synchronous motor direct torque control system based on direct feedback tinearization has better speed tracking performance and satisfactory current robustness.