【摘要】 常规基于滑模观测器的永磁同步电机(PMSM)无速度传感器控制方法往往需要使用低通滤波器(LPF)来抑制滑模抖振，而LPF的使用又会带来位置观测误差，因此还需要进行位置补偿。然而，常规的位置补偿方法受估计转速精度的影响。为了解决该问题，提出一种基于位置误差抵消锁相环(PECPLL)的PMSM无速度传感器控制策略。所提方法通过在传统锁相环的反馈回路中串联与滑模观测器中滤波特性相同的LPF,自动抵消了LPF产生的相位延迟，实现了PMSM位置信号的准确估计。该位置误差补偿方法不仅不受估计转速精度的影响，而且能够更好地滤除高频滑模噪声，从而有效提升了PMSM的速度和位置估计精度。同时，还建立了所提PECPLL的小信号模型，进行了稳定性分析，并给出了PECPLL的参数整定方案。最后，在一台3.7 kW表贴式PMSM上进行了对比实验研究，验证了所提方法的有效性和优越性。更多还原

【Abstract】 Conventional speed sensorless control method for permanent magnet synchronous motors(PMSM) based on sliding mode observer always requires low-pass filter(LPF) to suppress the sliding mode noises. However, the usage of LPF will bring position observation error. So, it is necessary to compensate this error. Nevertheless, the conventional position compensation methods are influenced by the accuracy of estimated speed. To address this problem, a sensorless control strategy for PMSM based on a position-error counteraction phase-locked loop(PECPLL) was proposed. The proposed method automatically compensates the phase delay caused by LPF through connecting another LPF in the feedback loop of phase-locked loop, whose filtering characteristic is the same as the LPF in the sliding mode observer, achieving accurate position estimation of PMSM. The proposed position error compensation method is not only immune to the speed estimation accuracy, but also can better filter out the high-frequency sliding mode noise, thus effectively improving the speed and position estimation accuracy of PMSM. In addition, a small-signal model of the proposed PECPLL was established, the stability analysis was conducted, and the parameter tuning scheme was also provided. Finally, comparative experimental studies were conducted on a 3.7 kW surface-mounted PMSM, verifying the effectiveness and superiority of the proposed method.更多还原