Active magnetic bearing control with zero steady-state power loss
Active magnetic bearing control with zero steady-state power loss
复制标题
主动磁力轴承控制，稳态功率损耗为零
DOI：
10.1109/acc.2002.1024917
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
D. Dawson
中科院分区：
文献类型：
--
作者：
N. Motee;M. Queiroz;Yongchun Fang;D. Dawson
在本文中，我们解决的问题，控制主动磁轴承减少欧姆功率损耗。提出了一种在非线性控制律中引入指数衰减偏磁的方法。为了避免控制奇异性，闭环系统以比偏置衰减更快的速率指数稳定。在稳态下，所提出的控制器具有零偏置磁通，因此，没有欧姆功率损耗。该控制方案适用于两种不同的轴承操作模式，所有电磁体在所有时间都是活动的，并且在任何给定时间只有一个相对的电磁体是活动的。后一种运作模式的严格分析，提出了沿着的实施战略。仿真结果表明，所提出的控制器的性能相比，一个标准的恒定偏置控制器的两种操作模式。
In this paper, we address the problem of controlling an active magnetic bearing with reduced ohmic power losses. A solution is proposed which introduces an exponentially decaying bias flux in the nonlinear control law. To avoid control singularities, the closed-loop system is exponentially stabilized at a faster rate than the bias decay. In the steady state, the proposed controller has zero bias flux; hence, there are no ohmic power losses. The control scheme is applied to two different bearing modes of operation all electromagnets active at all times and only one opposing electromagnet is active at any given time. A rigorous analysis of the latter mode of operation is presented along with an implementation strategy. Simulations are provided to illustrate the performance of the proposed controller for the two operating modes in comparison to a standard constant-bias controller.