This is a further study of two previous articles of the authors. The simulation model includes saliency and almost all common imperfections of linear permanent magnet synchronous machine. Based on the same model, three types of control have been applied to drive the lift car for a typical fully loaded upward journey, namely field-oriented control, which was used in two previous articles, direct force control (conventional direct torque control on a linear machine) and a newly proposed direct speed control (a new direct torque control method that could be used in the lift industry). The performances in terms of speed accuracy during start-up and rated speed operation, power and energy consumption have been studied. The conclusion is that for such a new application in the lift industry, at this moment in time, the more conventional field-oriented control is highly recommended. Two new findings are reported. Direct speed control that involves a simpler circuitry and reasonable speed control is proposed, although there is always a small steady-state error due to the absence of a proportional–integral controller. Conventional direct torque (force) control involves continuous integration to estimate the magnetic fluxes, which is not applicable to a permanent magnet synchronous machine with saliency. A new definition to analytically estimate the magnetic flux linkages in real time is also proposed. It should be noted that field-oriented control is superior at this time. When technology continues to get advanced, direct force control and direct speed control may one day be more appropriate for linear permanent magnet synchronous machine application. The software to perform the simulation has been uploaded to the BSER&T/SAGE website.

Practical application: It is generally agreed by the lift industry that the installation of multi-dimensional lifts employing linear permanent magnet synchronous machines is a clear trend in the future. This article is a follow up of two previous ones, studying the performance of three types of control for linear permanent magnet synchronous machine. Necessary equations of the machine model, imperfections, digital control loops are included. Some findings regarding the differences in performance are reported. It is hoped that this article is useful for lift manufacturers to enter this new market of vertical transportation.

这是对作者的前两篇文章的进一步研究。仿真模型包括线性永磁同步电机的显着性和几乎所有常见的缺陷。在同一模型的基础上，已经应用了三种类型的控制来驱动电梯轿厢进行典型的满载上行行程，即磁场定向控制（在前两篇文章中已使用过），即直接力控制（传统的直接转矩控制）。直线电机）和新提出的直接速度控制（可以在升降机行业中使用的新的直接转矩控制方法）。已经研究了在启动和额定速度运行期间的速度精度，功率和能耗方面的性能。结论是，对于此时此举在电梯行业中的新应用，强烈建议使用更常规的磁场定向控制。报告了两个新发现。尽管由于没有比例积分控制器，总会有一个很小的稳态误差，但还是提出了一种直接速度控制，该电路涉及一个较简单的电路和合理的速度控制。传统的直接转矩（力）控制涉及连续积分以估算磁通量，这不适用于具有显着性的永磁同步电机。还提出了一种新的定义，用于实时分析估计磁通量。应该注意的是，此时的磁场定向控制是优越的。随着技术的不断进步，直接力控制和直接速度控制可能会更适合线性永磁同步电机应用的一天。

实际应用：电梯行业普遍同意，使用线性永磁同步电机安装多维电梯是未来的明显趋势。本文是对前两个文章的续篇，研究了线性永磁同步电机的三种控制类型的性能。包括了机器模型，缺陷，数字控制回路的必要方程式。报告了一些有关性能差异的发现。希望本文对升降机制造商进入这个垂直运输新市场很有用。