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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Speed Sensorless Control of a Long-Stator Linear Synchronous Motor Arranged in Multiple Segments
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Speed Sensorless Control of a Long-Stator Linear Synchronous Motor Arranged in Multiple Segments

机译：多段长定子线性同步电动机的无速度传感器控制

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摘要

In the case of long-stator linear drives, unlike rotative drives for which speed or position sensors are a single unit attached to the shaft, these sensors extend along the carriage way, becoming a costly part of the system. Therefore, sensorless methods are of higher concern in linear motors than in rotative ones. For long carriage ways, the stator is usually divided in several independently fed segments in order to reduce the reactive power and to allow more than one vehicle to move on the same carriage way. This arrangement presents additional challenges in the implementation of sensorless methods because the position-dependent variables [as the electromotive force (EMF)] of each segment are nonperiodic signals. Moreover, the acquired speed and position information from one segment must be synchronized with the adjacent one when the mover passes over a segment transition. In this paper, a method to get a continuous estimation of the speed and position, even during the transition between segments, is proposed. This method uses an EMF observer for each active segment (i.e., where the mover is currently located, and the subsequent segment). Then, based on the addition of the observed EMF, a single speed and position observer is implemented for the mover. Using an experimental setup, validation results are attained and presented.
机译：在长定子线性驱动器的情况下，与旋转驱动器不同，在旋转驱动器中，速度或位置传感器是连接到轴的单个单元，这些传感器沿滑架方向延伸，成为系统的昂贵部分。因此，无传感器方法在线性电动机中比在旋转电动机中受到更多关注。对于长车道，定子通常分为几个独立的馈电段，以减少无功功率并允许多于一辆的车辆在同一车道上行驶。这种布置在无传感器方法的实施中提出了其他挑战，因为每个段的位置相关变量[作为电动势（EMF）]是非周期性信号。此外，当动子经过一个段过渡时，从一个段获取的速度和位置信息必须与相邻的同步。本文提出了一种即使在路段之间的过渡期间也能连续估计速度和位置的方法。此方法对每个活动段（即，动子当前所在的位置以及随后的段）使用EMF观察器。然后，基于所观察到的EMF的增加，为动子实现单个速度和位置观察器。使用实验设置，可以获得并显示验证结果。

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