摘要
提出了一种带有离线参数辨识的永磁同步电机(PMSM)无位置传感器控制方案。使用改进的基于解耦PMSM模型降阶反电动势观测器来估计转子位置与速度,提出一种极点配置方案,简化了降阶观测器的结构,同时分析了模型参数变化对位置估计误差的影响并且基于稳定性分析推导出交轴电流允许的极限值。在电机静止状态下,使用递推最小二乘方法将需要的电气参数离线辨识出来以供观测器使用,定子电阻和直交轴电感三个参数的辨识误差均在6%以内,能够满足应用需求。最后,通过实验验证了整个方案的可行性,电机转子位置估计误差在4°以内,速度估计误差在20 r/min以内,所使用的无传算法具有良好的动态性能。
A PMSM sensorless control scheme using identified parameters was presented. Reduced order back-EMF observers based on decoupled PMSM model were utilized for estimating rotor position and speed, and a method of poles assignment of observers was proposed, which can simplify the structure of reduced order observers. Furthermore, inaccuracy of estimated position caused by model variation was analyzed, then a method of designing maximum operating current was proposed to limit the inaccuracy. Meanwhile, recursive least square （RLS） method was utilized for parameters identification at standstill, then sensorless vector control works on base of the identified parameters, the identification errors of the three parameters（ stator resistance, direct axis inductance, quadrature axis inductance） are all within 6% which can meet the application requirement. At last, a series of experiments are set to validate the feasi- bility of the proposed algorithm, the estimation error of the rotor position is within 4 degrees and the speed estimation error is less than 20 r/min. The sensorless algorithm proposed has good dynamic performance.
出处
《电机与控制学报》
EI
CSCD
北大核心
2017年第1期1-7,共7页
Electric Machines and Control
