Direct Thrust Force Control of Primary Permanent-Magnet Linear Motors With Single DC-Link Current Sensor for Subway Applications
Direct Thrust Force Control of Primary Permanent-Magnet Linear Motors With Single DC-Link Current Sensor for Subway Applications
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DOI：
10.1109/tpel.2019.2923378
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发表时间：
2020-02
影响因子：
6.7
通讯作者：
Wei Wang;Yanan Feng;Yan Shi;M. Cheng;W. Hua;Z. Wang
中科院分区：
文献类型：
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作者：
Wei Wang;Yanan Feng;Yan Shi;M. Cheng;W. Hua;Z. Wang
由于磁铁和绕组都可以安装在动子中，初级永磁直线电机 (PPMLM) 对于地铁应用具有低成本优势。在本文中，针对地铁应用中的 PPMLM 牵引系统，提出了一种带有单个直流母线电流传感器的新型直接推力控制（DTFC）。第一相电流由直流母线电流传感器直接测量。第二相电流的感测具有有限的延迟，该延迟受到有限测量延迟原理的严格限制。第三相电流是根据三相电流之和为零的条件计算的。在当前重建期间，不需要电机参数。由于PPLMM可能会长时间同相下沉，影响电流重构精度，因此提出单一最优目标来重新选择原始电压矢量。与传统的DTFC方案相比，所提出的方案具有几乎相同的性能；特别是，最大速度和响应时间几乎保持不变。实验结果验证了所提出的DTFC方案的有效性。
Because both magnets and windings can be mounted in the mover, the primary permanent-magnet linear motor (PPMLM) has a low-cost advantage for subway applications. In this paper, a novel direct thrust force control (DTFC) with single dc-link current sensor is proposed for PPMLM traction system in subway applications. The first phase current is directly measured by the dc-link current sensor. The second phase current is sensed with a limited delay, which is strictly limited by the limited measurement delay principle. The third phase current is calculated based on the condition that the summation of the three phase currents is zero. During the current reconstruction, no motor parameters are required. Because PPMLM may sink in the same phase for a long time and affect the current reconstruction accuracy, the single optimal target is proposed to re-select the original voltage vector. Compared with the conventional DTFC scheme, the proposed one has nearly the same performances; especially, the maximum speed and response time remain nearly unchanged. The effectiveness of the proposed DTFC scheme is verified by experimental results.