永磁同步电机新型无差拍直接转矩控制

针对传统无差拍直接转矩控制中电机内部参数摄动对给定电压矢量的影响,提出一种基于滑模扰动观测器补偿的永磁同步电机无差拍直接转矩控制策略。首先,结合滑模控制理论,分别构建了d,q轴滑模扰动观测器,对参数摄动引起的d,q轴电压变化量进行观测,将其补偿至给定d,q轴电压,提高系统对参数摄动的鲁棒性。其次,对q轴滑模扰动观测器进行了重构,在对q轴参考电压扰动补偿的同时对转子磁链进行了有效辨识。试验结果验证了新型控制策略的有效性和实用性。

New Deadbeat Direct Torque Control of Permanent Magnet Synchronous Motor

Aiming at the influence of motor internal parameter perturbation on the given voltage vector in traditional deadbeat direct torque contro(l DBDTC),a deadbeat direct torque control strategy for permanent magnet synchronous motor(PMSM)based on sliding mode disturbance observer(SMDO)compensation was proposed.Firstly,combined with the sliding mode control theory,SMDO of d,q axis were constructed respectively to observe the voltage variation caused by parameter perturbation,and compensate it to the given voltage to improve the robustness of the system to parameter perturbation.Secondly,the SMDO of q axis was reconstructed,and the rotor flux linkage was effectively identified while the d,q axis reference voltage disturbance compensation was applied.The experimental results verify the effectiveness and practicability of the new control strategy.