Fault-Tolerant Control of Primary Permanent-Magnet Linear Motors With Single Phase Current Sensor for Subway Applications
Fault-Tolerant Control of Primary Permanent-Magnet Linear Motors With Single Phase Current Sensor for Subway Applications
复制标题
地铁应用中采用单相电流传感器的初级永磁直线电机的容错控制
DOI：
10.1109/tpel.2019.2899168
复制
发表时间：
2019-11-01
影响因子：
6.7
通讯作者：
Wang, Zheng
中科院分区：
文献类型：
--
作者：
Wang, Wei;Feng, Yanan;Wang, Zheng
由于磁体和绕组都可以安装在动子中，初级永磁直线电机（PPMLM）在地铁应用中具有低成本优势。针对地铁PPMLM牵引系统，提出了一种基于单相电流传感器的容错控制方法。在建议的FTC，d-和q-轴电流估计从参考同步电流和幸存的测量相电流。由于不需要机器参数，因此估计是鲁棒的。在稳态操作中，估计的电流误差是实际误差的一半。结果，电流响应变慢，但可以实现电流命令。然而，控制目标的实现取决于电流跟踪精度，这是由电压倍增器提高。与已有的FTC方案相比，该方案具有较好的鲁棒性和暂态性能。理论分析和实验结果验证了该方法的有效性。
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 fault-tolerant control (FTC) with single phase current sensor is proposed for PPMLM traction system in subway applications. In the proposed FTC, d- and q-axis currents are estimated from the reference synchronous currents and the surviving measured phase current. The estimation is robust since no machine parameters are required. In steady-state operation, the estimated current errors are half the actual ones. As a result, the current response is slowed but the current command can be achieved. However, the achievement of control target depends on the current tracking accuracy, which is enhanced by the voltage decoupler. Compared with existed FTC schemes, the proposed one is robust and has better transient-state performances. The effectiveness of the proposed FTC is verified by theoretical analysis and experimental results.