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首页> 外文期刊>Trends in Ecology & Evolution >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：具有用于地铁应用的单直流电流传感器初级永磁电动机的直接推力控制

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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：因为磁体和绕组都可以安装在动画片中，所以主永磁线性电机（PPMLM）对地铁应用具有低成本优势。在本文中，提出了一种具有单直流电流传感器的新型直推力控制（DTFC），用于地铁应用中的PPMLM牵引系统。通过DC-Link电流传感器直接测量第一相电流。通过有限的延迟感测第二相电流，其严格受到有限的测量延迟原理的限制。基于三相电流的求和为零的条件来计算第三相电流。在当前的重建期间，不需要电机参数。因为PPMLM可能长时间沉入相同的相位并影响电流重建精度，所以提出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，提出的拟议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。所提出的DTFC方案的有效性通过实验结果验证。

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