As for the sensorless control of interior permanent magnet synchronous motor (IPMSM), conventional high frequency (HF) pulsating signal injection method is widely used, which uses band-pass filter (BPF) and low-pass-filter (LPF) based phase-locked-loop (PLL), however it may face the problems of poor stability and long convergence time. Therefore, an improved signal demodulation algorithm based on moving-average-filter (MAF)-PLL is proposed. MAF, which makes full use of the HF signal periodicity and half-wave symmetry, has higher bandwidth and better harmonics suppression ability than BPF or LPF. Furthermore, a proportional-integral (PI) regulator is used to gain the rotor speed and an integrator is applied to estimate rotor position. Compared with the conventional method, the proposed method gets rid of BPF and LPF, contributing to improving the stability and dynamic performance. Besides, undetermined parameters are reduced to one, i.e., window length of MAF, avoiding complex parameters design and selection. The proposed HF pulsating injection method has simpler signal demodulation process and is easy to implement. Finally, the experimental results have verified the feasibility and effectiveness of proposed method.

中文翻译：

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使用基于移动平均滤波器的 PLL 在 HF 脉冲信号注入方法中对 IPMSM 进行无传感器控制

对于内置式永磁同步电机（IPMSM）的无传感器控制，广泛使用传统的高频（HF）脉动信号注入方法，它使用基于带通滤波器（BPF）和低通滤波器（LPF）的相位-锁环（PLL），但可能面临稳定性差和收敛时间长的问题。为此，提出了一种改进的基于移动平均滤波器(MAF)-PLL的信号解调算法。MAF充分利用了高频信号的周期性和半波对称性，比BPF或LPF具有更高的带宽和更好的谐波抑制能力。此外，比例积分 (PI) 调节器用于获得转子速度，积分器用于估计转子位置。与传统方法相比，该方法摆脱了 BPF 和 LPF，有助于提高稳定性和动态性能。此外，未定参数减少为一个，即MAF的窗口长度，避免了复杂的参数设计和选择。所提出的高频脉动注入方法具有更简单的信号解调过程并且易于实现。最后，实验结果验证了所提方法的可行性和有效性。