【摘要】 在永磁同步电机驱动系统中,由死区效应、磁链谐波和电流采样误差等非理想因素导致的周期性扰动转矩会造成转速波动。针对这一问题,该文提出了一种对各主要频次转速波动分量进行比例增益补偿的转速波动抑制策略。首先利用卡尔曼滤波对各主要频次转速波动分量进行估算,并将这些转速波动分量与PI控制器并联,嵌入到转速控制环的前向通道中。然后,根据系统对周期性扰动转矩的衰减程度,选取各主要频次转速波动分量对应的比例增益补偿值,从而实现对周期性扰动转矩的抑制。实验结果表明,所提出的策略能够有效改善电机的稳态控制性能。更多还原

【Abstract】 In the permanent magnet synchronous motor(PMSM) drives, periodic disturbance torques, caused by non-ideal factors like dead time effect, flux harmonics and current sampling errors, can lead to speed ripples. To solve this problem, this paper proposed a control strategy of speed ripple minimization where the proportional gains of the main order speed ripple components were compensated. Firstly, this strategy estimated the main order speed ripple components by Kalman filter, and embedded these estimated components in forward channel of speed loop by paralleling them with the PI controller. Then, according to attenuation degree of periodic disturbance torques, the values of proportional gain compensation corresponding to these speed ripple components were selected. Thus these periodic disturbance torques were suppressed. The experimental results show that the proposed strategy can efficiently improve the steady-state performance of the PMSM drives.更多还原