School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China.
ISA Trans. 2019 Feb;85:161-176. doi: 10.1016/j.isatra.2018.10.004. Epub 2018 Oct 16.
To improve the performance of permanent-magnet synchronous motor (PMSM) drives, a sensorless control scheme based on a sliding mode observer (SMO) with a fuzzy logic controller (FLC) and a dual second-order generalized integrator-frequency locked loop (DSOGI-FLL) is proposed in this paper. The major drawbacks of the conventional SMO, namely chattering phenomena, high-order harmonics and external noise, are discussed. These drawbacks affect the estimated accuracy of the SMO and reduce the control reliability of the system. To eliminate these drawbacks, an FLC is designed and integrated into the SMO to adjust the observer gain in a self-adaptive manner and to reduce the chattering; an existing dual synchronous frequency extract filter-phase locked loop (DSFF-PLL) is used to filter out the main components of high-order harmonics and to calculate the rotor position and speed precisely. Furthermore, to obtain an accurate fundamental frequency for the phase locked loop (PLL) and filter out the remaining harmonics and external noise signals, DSOGI-FLL processing is developed and incorporated into the DSFF-PLL. An overall PMSM sensorless control system based on the proposed SMO is designed, and an experimental platform using the TMS320F28335 DSP controller is built. Comparative experiments using the proposed SMO and the conventional SMO are performed to validate the effectiveness of the proposed FLC and the DSFF-DSOGI-FLL-PLL structures. Performance experiments of the overall proposed SMO-based sensorless control scheme are performed to verify the robustness and control reliability of the system. The results show that the proposed SMO has satisfactory performances and can be used in practical engineering.
为了提高永磁同步电机（PMSM）驱动器的性能，本文提出了一种基于滑模观测器（SMO）的无传感器控制方案，该方案结合了模糊逻辑控制器（FLC）和双二阶广义积分-锁相环（DSOGI-FLL）。本文讨论了传统 SMO 的主要缺点，即抖振现象、高次谐波和外部噪声，这些缺点会影响 SMO 的估计精度，并降低系统的控制可靠性。为了消除这些缺点，设计并集成了一个 FLC 来自适应地调整观测器增益，从而减少抖振；采用现有的双同步频率提取滤波器锁相环（DSFF-PLL）来滤除高次谐波的主要成分，并精确计算转子位置和速度。此外，为了获得 PLL 的准确基频，并滤除剩余的谐波和外部噪声信号，开发并集成了 DSOGI-FLL 处理。设计了一个基于所提出的 SMO 的整体 PMSM 无传感器控制系统，并构建了一个使用 TMS320F28335 DSP 控制器的实验平台。进行了使用所提出的 SMO 和传统 SMO 的对比实验，以验证所提出的 FLC 和 DSFF-DSOGI-FLL-PLL 结构的有效性。进行了整体基于所提出的 SMO 的无传感器控制方案的性能实验，以验证系统的鲁棒性和控制可靠性。结果表明，所提出的 SMO 具有令人满意的性能，可用于实际工程。
