A Position Sensorless Control Strategy for SPMSM Based on an Improved Sliding Mode Observer

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhu, Wenkai^1

Beihang University School of Instrumentation and Optoelectronic Engineering, Beijing, China^1

关键词: Chattering phenomenon;    High Speed;    Phase lags;    Position sensorless control;    Sliding mode observers;    State variables;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032135/pdf
DOI  :  10.1088/1755-1315/252/3/032135

来源: IOP

【 摘 要 】

Due to chattering phenomenon, a low-pass filter (LPF) is commonly used to suppress chattering in conventional sliding mode observer (SMO). However, the phase lag caused by LPF will degrade the performance of sensorless control for SPMSM, especially in high-speed range. To solve this problem, an improved SMO (ISMO) is proposed in this paper, which adds the flux as a state variable based on conventional SMO. Then, the observer will filter out the chattering signal while observing the magnetic flux accurately.