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首页> 外文期刊>Magnetics, IEEE Transactions on >High-Fidelity Magnetic Characterization and Analytical Model Development for Switched Reluctance Machines
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High-Fidelity Magnetic Characterization and Analytical Model Development for Switched Reluctance Machines

机译：开关磁阻电机的高保真磁性表征和分析模型开发

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摘要

This paper proposes a new experimental procedure for magnetic characterization of switched reluctance machines. In the existing methods, phase voltage and current data are captured and further processed to find the flux linkage. Conventionally, assuming zero initial flux value, the flux linkage can be found by integrating the corresponding voltage term. However, the initial flux value is usually unknown, e.g., it can be nonzero when the current is zero due to the residual flux effect, and, thus, imposes error in magnetic characterization. The proposed method addresses this issue by considering an additional equation in steady state. This method injects a low-frequency sinusoidal current to one of the phase windings when the rotor is blocked at a given position. Since the phase is excited by a sinusoidal current, the averaged flux over an excitation cycle is zero, even though the residual flux and core loss exist. This additional equation together with the voltage integration make it possible to avoid errors associated with the core nonidealities and accurately solve for the magnetic flux. Furthermore, an analytical expression is proposed that precisely fits the magnetic curves. The proposed characterization methodology and analytical model are verified using the experimental results from a 3-phase 12/8 switched reluctance machine.
机译：本文为开关磁阻电机的磁特性提出了一种新的实验程序。在现有方法中，捕获相电压和电流数据并进行进一步处理以找到磁链。通常，假设初始磁通值为零，则可以通过积分相应的电压项来找到磁链。然而，初始磁通量值通常是未知的，例如，由于残留磁通量效应，当电流为零时，初始磁通量值可以为非零，从而在磁特性上产生误差。所提出的方法通过考虑稳态下的附加方程来解决此问题。当转子被锁定在给定位置时，该方法将低频正弦电流注入相绕组之一。由于该相由正弦电流激励，因此即使存在剩余磁通和铁芯损耗，整个励磁周期的平均磁通也为零。该附加方程式与电压积分一起可以避免与磁芯非理想性相关的误差，并精确求解磁通量。此外，提出了一种精确拟合磁曲线的解析表达式。利用三相12/8开关磁阻电机的实验结果验证了所提出的表征方法和分析模型。

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