Torque Ripple Suppression Method based on FOC for SRM without FEM analysis
Torque Ripple Suppression Method based on FOC for SRM without FEM analysis
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基于 FOC 的 SRM 无需 FEM 分析的扭矩脉动抑制方法
DOI：
10.23919/epe21ecceeurope50061.2021.9570509
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Jun
中科院分区：
文献类型：
--
作者：
Kouki Tokui;Takahiro Kumagai;Jun
提出了一种仅需可测参数的开关磁阻电动机转矩涟漪抑制方法。传统的方法是将SRM三相电流转换为零相电流和dq轴电流，使dq轴电流恒定，从而产生较大的三阶转矩涟漪。此外，传统方法假定电感分布关于电流的变化是恒定的。在磁饱和区域中，电感在对准位置处减小。因此，转矩涟漪抑制方法的效果变低，并且不能在磁饱和区域中控制平均转矩。所提出的方法推导出零相电流与三阶谐波，以抑制转矩涟漪的转矩方程，考虑空间谐波的电感轮廓的四阶和转矩/电流比在整个区域。此外，提出了一种平均转矩控制的磁饱和区。平均转矩方程是从表示磁饱和时的磁共能的电感导出的。结果，实验表明，与具有恒定dq 0轴电流的传统方法相比，转矩涟漪在线性区域中减少了76.1%，在磁饱和区域中减少了73.4%。此外，推导的平均转矩方程与实验结果一致，误差为3.9%。
This paper proposes a torque ripple suppression method for a switched reluctance motor (SRM) with only measurable parameters. A large third-order torque ripple is generated by a conventional method with constant dq0-axis current, which is dq-axis current and zero-phase current converted from the three phase current of SRM. Moreover, the conventional method assumes an inductance profile constant regarding a change in the current. In the magnetic saturation region, the inductance decreases at an aligned position. Thus, an effect of the torque ripple suppression method becomes low and the average torque cannot be controlled in the magnetic saturation region. The proposed method derives the zero-phase current with the third-order harmonic in order to suppress the torque ripple from a torque equation considering spatial harmonics of the inductance profile up to the forth order and torque/current ratio in whole region. In addition, an average torque control is proposed for the magnetic saturation region. The average torque equation is derived from the inductance expressing the magnetic co-energy at the magnetic saturation. As a result, the experiments demonstrated that the torque ripple is reduced by 76.1% in the linear region and by 73.4% in the magnetic saturation region compared to the conventional method with the constant dq0-axis current. Moreover, the derived average torque equation agrees with the experimental results including the error of 3.9%.