一种基于转矩扰动观测器+重复控制的船舶永磁同步电机矢量控制技术

船舶永磁同步电机(PMSM)在海洋复杂环境下运行时,容易受到转矩扰动,严重影响电机的控制性能,这一问题在PMSM中低速运行时更为明显。针对这一问题,提出一种基于转矩扰动观测器+重复控制的PMSM矢量控制方案。设计了一个基于转子位置的转矩扰动观测器,用于估测PMSM扰动转矩,并在此基础上结合重复控制的思想,周期性地补偿并缩小由扰动转矩而产生的误差。通过MATLAB/Simulink仿真和试验,验证了该方案具有较强的抗转矩扰动能力和较好的调速性能。

Vector Control of Marine Permanent Magnet Synchronous Motor Based on Torque Disturbance Observer and Repetitive Control

The marine permanent magnet synchronous motor (PMSM) is susceptible to torque disturbances when it is operated in a complex marine environment, which leads to a poor control performance. This phenomenon is more obvious when the PMSM is running at low and medium speed. In order to solve this problem, a vector control strategy of PMSM based on torque disturbance observer and repetitive control is proposed. A torque disturbance observer based on the rotor position is designed, which is used to estimate the torque of PMSM. Combining the torque disturbance observer with the theoretical thought of repetitive control, the error caused by the torque disturbance can be compensated periodically and reduced. Through MATLAB/Simulink simulation and experiments, it is proved that the strategy has the advantages of strong anti torque disturbance capability and good speed dynamic control performance.