低采样比下基于滑模观测器的无传感器永磁同步电机驱动误差分析与设计

Sliding-mode observer (SMO) is widely used to achieve high-performance sensorless control of permanent-magnet-synchronous-motor drives. However, the conventional SMO presents increased position estimation error as the sampling ratio decreases even without parameter errors. It is shown in this article that the position error resulted from an SMO itself can be decomposed into three components, which...