内嵌式永磁同步电机永磁磁链在线辨识研究

针对内嵌式永磁同步电机永磁磁链辨识存在的问题,采用一种基于滑模变结构的永磁磁链参数辨识方法。首先,通过选择磁场同步旋转坐标系下定子电流和电感的乘积作为状态变量,构造内嵌式永磁同步电机永磁磁链辨识的状态方程;然后,利用滑模变结构与该模型相结合的方法,构造滑模观测器,并采用Lyapunov稳定性理论证明该观测器的稳定性和待辨识磁链参数的收敛性;最后,以仿真结果验证了该方法对永磁同步电机永磁磁链辨识的可行性。

Study on the On-Line Identification of Permanent Magnet Flux Linkage for Interior Permanent Magnet Synchronous Motors

In view of the flaw found in the identification of permanent magnet flux linkage for interior permanent magnet synchronous motors, a parameter identification method of permanent magnet flux linkage based on sliding mode variable structure has thus been proposed. Firstly, taking as state variables the product of stator current and inductance in the magnetic field synchronous rotating coordinate system, the state equation for permanent magnet flux identification of interior permanent magnet synchronous motors (IPMSM) can be constructed. Then, a sliding mode observer can be constructed by combining the sliding mode variable structure with the model, followed by the proof of the stability of the observer and the convergence of the flux parameters to be identified by using Lyapunov stability theory. Finally, the feasibility of the method to identify permanent magnet flux linkage for interior permanent magnet synchronous motors can be verified by simulation results.