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首页> 外文期刊>IEEE Transactions on Power Electronics >Direct Thrust Force Control of Primary Permanent-Magnet Linear Motors With Single DC-Link Current Sensor for Subway Applications
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Direct Thrust Force Control of Primary Permanent-Magnet Linear Motors With Single DC-Link Current Sensor for Subway Applications

机译：用于地铁应用的具有单个直流母线电流传感器的初级永磁直线电机的直接推力控制

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摘要

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.
机译：由于磁铁和绕组都可以安装在动子上，因此初级永磁线性电动机（PPMLM）在地铁应用中具有低成本优势。本文针对地铁应用中的PPMLM牵引系统，提出了一种新型的具有单个直流环节电流传感器的直接推力控制（DTFC）。第一相电流由直流母线电流传感器直接测量。第二相电流以有限的延迟感测，该延迟受到有限的测量延迟原理的严格限制。基于三相电流之和为零的条件来计算第三相电流。在电流重建期间，不需要电动机参数。由于PPMLM可能长时间陷入同一相位并影响电流重建精度，因此提出了单个最佳目标来重新选择原始电压矢量。与传统的DTFC方案相比，该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。

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