双三相永磁同步电机改进型自适应增益SMO无传感器研究OA北大核心

To address the high-frequency chattering and signal distortion when traditional SMO and low-pass filters are used with dual three-phase permanent magnet synchronous motors,we consider the inductive coupling between the two sets of windings in DTP-PMSM.We propose an improved sensorless control algorithm based on an adaptive gain SMO.The algorithm,derived from the vector space decoupling mathematical model of DTP-PMSM,adaptively adjusts the sliding mode gain according to current-related variables.It increases the sliding mode gain when the state variables are far from the sliding surface to accelerate the convergence of the SMO.It decreases the gain near the sliding surface to reduce high-frequency chattering.Our simulation results demonstrate our algorithm enhances the accuracy and convergence speed of rotor speed estimation.For a reference speed of 100 r/min,the steady-state speed estimation error is reduced from±2 r/min to±0.5 r/min.At 200 r/min,the error is down from±6 r/min to±0.5 r/min,with the observer convergence time cut from 0.04 s to 0.02 s.Our research may provide a new approach to sensorless control technology in DTP-PMSM,effectively addressing the high-frequency chattering caused by inductive coupling between the two windings.Thus,it holds significant theoretical and practical values.