积分型终端滑模PMSM无传感器控制优化

Integral Terminal Sliding Mode PMSM Sensorless Control Optimization

针对永磁同步电机(PMSM)无位置矢量控制时的转子位置和转速估计精度低的问题,提出一种基于快速幂次趋近律的新型终端滑模观测器(SMO)。首先,设计一个非奇异快速终端滑模面,在避免观测器存在奇异问题的前提下,不仅使电流观测误差快速收敛到零,还能有效地抑制抖振;然后,结合快速幂次趋近律设计终端SMO的控制律;最后,使用锁相环(PLL)系统来提取转子的位置信息和转速信息。仿真实验结果表明,与传统积分型滑模面的非奇异快速终端SMO(NFTSMO)相比,所设计的新型终端SMO可以有效地提高PMSM转速估计的精度,并且转子位置的估计误差小,系统动、静态响应好。

Aiming at the accurate estimation of rotor position and speed of permanent magnet synchronous motor(PMSM)for the sensorless vector control system,a novel terminal sliding mode observer(SMO)based on fast approach law is proposed.Firstly,a non-singular fast terminal sliding mode surface is constructed,which makes the observation error of currents converge to zero quickly and avoids the singular problem as well as effectively suppress chattering.Then,the control law of terminal SMO is designed with the fast power approach law.Finally,the information of rotor position and speed is extracted from the phase-locked loop(PLL).Compared with the nonsingular fast terminal SMO(NFTSMO)with traditional integral sliding mode surface,the simulation results show that the new terminal SMO can effectively improve the estimation accuracy of PMSM speed.And the estimation of the rotor position is accurate,the system has good dynamic and static performances.