无刷双馈电机电感参数的计算

Computation of Inductances of the Brushless Doubly-fed Machine

为准确计算无刷双馈电机的微分电感参数,在传统有限元能量摄动法的基础上,提出一种改进的能量摄动法。新方法可大大减少非线性方程的求解次数,并具有采用1阶导数求解、直接计算能量增量等优点。通过一台类笼型转子无刷双馈电机的算例和实验结果对比,表明该法效率更高、计算更准确,为无刷双馈电机的仿真提供了一种实用的电感计算方法。

For the purpose of accurate calculation of differential inductances in brushless doubly-fed machine, an improved energy perturbation method is proposed based on conventional finite-element energy perturbation method. The new method may greatly decrease the number of times to solve nonlinear equations and have some other advantages, such as only employing first derivation and direct calculating the increment of energy perturbation. The experimental results on a test motor in comparison to the values calculated show that the proposed method, with higher computing efficiency and accuracy, are practically suitable for inductances calculation of brushless doubly-fed machine.