永磁同步电机(PMSM)转速或转矩驱动系统都要求具有良好的电流控制性能,因此对电流环的控制至关重要。为了提高电流的动态性能和鲁棒性,基于无差拍预测控制和扰动观测器提出了一种新的PMSM电流控制方法。利用预测控制动态性能好,易于数字实现等优点,基于无差拍原理设计了预测电流控制器,但该方法对电机模型及参数依赖较大。针对实际应用中由于建模误差及参数变化等产生的扰动,设计了一种简单的扰动观测器,并用于电流环的前馈补偿控制,有效地提高了系统的鲁棒性。基于dSPACE平台完成了试验验证。试验结果表明:所提出的电流控制方法能实现电流的快速跟踪控制,而且具有较强的鲁棒性。

The favourable current control was required in speed or torque drive system of permanent magnet synchronous motor, so it’s very important for the control of the current loop. In order to improve the transient performance and the robustness, a novel current control method based on deadbeat predictive control and disturbance observer was proposed. By using the good transient response and easy digital realization of predictive control, the current controller was designed based on deadbeat theory, which was greatly dependent on the motor model and the parameters. According to the disturbance caused by the modeling error and parameter variations, a simple disturbance observer was designed, which was used for the feedforward compensation control. The robustness was enhanced effectively. The experiment was complemented on dSPACE, and the results showed that the proposed current control method had good current tracking and strong robust performance in various conditions.

TM 351

国家自然科学基金项目(61403236,61703222)；山东工商学院博士启动基金项目(BS201511)