This article focuses on the analysis of the quasi-zero power characteristic for a permanent magnetic levitation system with a variable flux path control mechanism. The system mainly consists of a disk permanent magnet, a pair of yokes, and a rotary actuator. The permanent magnet magnetized diametrically is rotated by the actuator, which can achieve the control of the levitation force by changing the flux. Unlike the electromagnetic system, the input to the actuator is used to maintain the rotation angle corresponding to the equilibrium position, not to directly produce a magnetic force. Therefore, the proposed system possesses a lower power consumption. Analysis of mechanism, current model, and different levitation control strategies are presented in this article. With the variable air gap length control and the constant air gap length control, the permanent magnetic levitation system performs well in levitation with quasi-zero power in loading experiments. The constant air gap control is demonstrated to possess higher safety when the levitation mass is changed, which has the potential for magnetic levitation transportation.

中文翻译：

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具有可变磁通路径控制机制的永磁悬浮系统的准零功率特性分析

本文重点分析具有可变磁通路径控制机制的永磁悬浮系统的准零功率特性。该系统主要由磁盘永磁体，一对磁轭和一个旋转致动器组成。沿直径方向磁化的永磁体通过执行器旋转，这可以通过改变磁通量来实现对悬浮力的控制。与电磁系统不同，执行器的输入用于保持对应于平衡位置的旋转角度，而不是直接产生磁力。因此，所提出的系统具有较低的功耗。本文介绍了机理，电流模型和不同的悬浮控制策略的分析。通过可变气隙长度控制和恒定气隙长度控制，在负载实验中，永磁悬浮系统在准零功率下的悬浮性能很好。证明了当改变悬浮质量时，恒定气隙控制具有更高的安全性，这具有磁悬浮运输的潜力。