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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Calculation of Eddy Current Loss in a Tubular Oscillatory LPMSM Using Computationally Efficient FEA
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Calculation of Eddy Current Loss in a Tubular Oscillatory LPMSM Using Computationally Efficient FEA

机译：使用计算有效的有限元分析计算管状振荡LPMSM中的涡流损耗

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摘要

In some special oscillatory applications, especially those operated at high speeds, the eddy current loss of a linear permanent-magnet (PM) synchronous machine (LPMSM) should be fully considered because the loss might be large and concentrated in PMs during the oscillation period. This paper presents a loss analysis method based on computationally efficient finite-element analysis (CE-FEA) for a 20-Hz oscillatory tubular LPMSM. Since the mover speed varies with time, an equally divided model in 1/4 period is introduced to calculate the average PM eddy current loss. The flux density curves in PMs are calculated at 18 intervals by the CE-FEA, through which the change rate of the magnetic flux density is analyzed, considering both the entering and leaving effects and coil end effects. The calculation results show that the eddy current loss is obviously concentrated in PMs near the two ends of coils. The calculation results at a speed of 3.6 m/s obtained by the CE-FEA and two-dimensional and three-dimensional time-stepping FEAs are compared to validate the accuracy. Finally, the proposed method is validated by the experimental test results on a prototype LPMSM.
机译：在某些特殊的振荡应用中，尤其是在高速运行的应用中，应充分考虑线性永磁（PM）同步电机（LPMSM）的涡流损耗，因为在振荡期间损耗可能很大并且集中在PM中。本文提出了一种基于计算有效有限元分析（CE-FEA）的20 Hz振荡管状LPMSM损耗分析方法。由于动子速度随时间变化，因此引入1/4周期的均分模型来计算平均PM涡流损耗。 CE-FEA以18个间隔计算出PM中的磁通密度曲线，通过分析磁通密度的变化率，同时考虑了进入和离开效应以及线圈末端效应。计算结果表明，涡流损耗明显集中在线圈两端附近的永磁体中。通过CE-FEA以及二维和三维时步FEA获得的速度为3.6 m / s的计算结果进行了比较，以验证准确性。最后，通过在原型LPMSM上的实验测试结果验证了该方法的有效性。

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