【摘要】 针对开关磁阻电机中高速无位置传感器控制中对电机磁链特性曲线的依赖问题，提出一种基于磁链傅里叶级数模型的开关磁阻电机转子位置估计方法。首先，通过积分获得不连续的计算磁链；其次，构建了基于快速延时信号消除法的磁链观测器，消除计算磁链中包含的直流偏置和50次以下所有谐波，得到含有明确位置信息的磁链基波；再次，通过分析计算磁链的不连续性及磁链观测器带来的相移，明确磁链基波与转子位置之间的相位关系；最后，通过锁相环得到估计转子位置和转速，并通过仿真分析和实验结果验证了所提出方法的有效性。实验结果表明，样机空载稳定运行时转子位置估计误差不超过2.4°,突加负载时不超过2.6°,转速突变时不超过3.1°。更多还原

【Abstract】 To address the issue of dependence on motor flux linkage characteristic curves in sensorless control of switched reluctance motors(SRMs) during medium and high speed operation, a rotor position estimation method for SRMs based on the flux linkage Fourier series model was proposed. Firstly, discontinuous calculated flux linkage was obtained through integration. Secondly, a flux observer based on the fast delayed signal cancellation method was constructed to eliminate the DC bias and all harmonics below the 50th order in the calculated flux linkage, yielding a fundamental flux component with clear position information. Thirdly, by analyzing the discontinuity of the calculated flux linkage and the phase shift introduced by the flux observer, the phase relationship between the fundamental flux component and the rotor position was clarified. Finally, the estimated rotor position and speed were obtained via a phase-locked loop(PLL) and the effectiveness of the proposed method was verified by simulation analysis and experimental results. The experimental results show that the rotor position estimation error does not exceed 2.4° during no-load steady-state operation, does not exceed 2.6° during sudden load application, and does not exceed 3.1° during sudden speed changes.更多还原