This article proposes an equivalent conversion-based improved loss minimization control method for interior permanent magnet synchronous motor (IPMSM). In the proposed control method, both the copper loss and iron loss are studied and the efficiency optimization problem due to the unequal inductance parameters of IPMSM is considered and solved, thus achieving the optimal efficiency. First, according to the mathematical model of the IPMSM considering iron loss resistance, the equivalent conversion method is presented to derive the relationship between electromagnetic torque, d-axis and q-axis currents. Then, by the polynomial fitting method, the d-axis and q-axis currents which minimize the electrical loss (copper loss and iron loss) are calculated. Additionally, to further show the performance of the proposed control method, the maximum torque per ampere control method and the approximate processing control method are studied for the comparative analysis. Both the simulation and experimental results show that the proposed control method can comprehensively reduce the electrical loss of the IPMSM, showing the effectiveness of the proposed control method.

中文翻译：

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使用等效转换方法改进 IPMSM 的损耗最小化控制

本文提出了一种基于等效转换的改进型内置式永磁同步电机（IPMSM）损耗最小化控制方法。在所提出的控制方法中，既研究了铜损又研究了铁损，并考虑并解决了IPMSM电感参数不等引起的效率优化问题，从而实现了最佳效率。首先，根据考虑铁损电阻的IPMSM数学模型，提出等效换算方法，推导出电磁转矩、d轴和q轴电流之间的关系。然后，通过多项式拟合方法，计算出使电损耗（铜损和铁损）最小化的 d 轴和 q 轴电流。此外，为了进一步展示所提出的控制方法的性能，研究了最大安培转矩控制方法和近似处理控制方法进行比较分析。仿真和实验结果均表明所提出的控制方法能够全面降低IPMSM的电气损耗，显示了所提出的控制方法的有效性。