In the control of variable flux reluctance machine (VFRM) excited by zero-sequence current, neglecting the zero-sequence resistive voltage drop would cause a large calculation deviation of the stator voltage, which can saturate the inverter and influence the switching from constant torque region to flux-weakening region. To solve with this problem, a flux-weakening control method considering the zero-sequence resistive voltage drop for VFRM is proposed. Firstly, the relationship between dq -axis voltages, zero-sequence voltage and the maximum voltage is presented. Secondly, based on the deduced voltage constraint, the calculation of optimal reference currents in flux-weakening region is presented by using Lagrange multiplier method. Since the zero-sequence voltage is considered, the calculation accuracy of the stator voltage and the utilization rate of DC link voltage are improved, which improves the output power capability. Finally, the proposed method is verified by the experimental results.

中文翻译：

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考虑零序电阻压降的零序电流激励的可变磁阻电机的弱磁控制

在零序电流激励的可变磁阻磁阻电机（VFRM）的控制中，忽略零序电阻压降会导致定子电压的较大计算偏差，这可能会使逆变器饱和并影响从恒转矩区域的切换到弱通量区域。为了解决这个问题，提出了一种考虑零序电阻压降的磁通弱化控制方法。首先，dq 给出了轴电压，零序电压和最大电压。其次，基于推导的电压约束，利用拉格朗日乘数法给出了弱磁通区最优参考电流的计算方法。由于考虑了零序电压，提高了定子电压的计算精度和直流母线电压的利用率，提高了输出功率的能力。最后，实验结果验证了该方法的有效性。