Behaviour and control of an inverter-fed three-pole active radial magnetic bearing
Behaviour and control of an inverter-fed three-pole active radial magnetic bearing
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逆变器供电的三极主动径向磁轴承的行为和控制
DOI：
10.1109/isie.2003.1267954
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
W. Hoffman
中科院分区：
文献类型：
--
作者：
W. Hoffman
目前，主动磁轴承多为三极或四极异极型。因此，新的发展努力实现可以用传统三相逆变器实践的磁轴承的承诺。这种单极径向轴承由一个铁环组成，铁环上有三个集中的磁极，磁极由磁性线圈缠绕。磁场线在其他磁极和保持器上是闭合的。存在气隙的径向交叉。对于这样的单极磁轴承，所有通量的总和必须为零。极通量和极力都依赖于三相磁势。为了在两个轴上投射位置控制回路，需要强电流和低位置依赖性解耦。进一步调查有关的偏置进行了讨论，这是必要的力电流特性线性化。
Nowadays active magnetic bearings (AMB) are used as heteropolar ones with three or four pole-pairs. Newer evolutions strive therefore for the commitment of magnetic bearings that can be practiced with traditional three-phase inverters. Such unipolar radial bearing consists of an iron ring with three concentrated poles wounded by magnetic coils. The magnetic field lines are closed over the other poles and the keeper. There exists a radial crossing of the air gaps. For such a unipolar magnetic bearing the sum of all fluxes must be zero. The pole-fluxes and pole-forces are all dependent on the three-phase m.m.f. To project a position control-loop in two axes a strong current- and low position-dependent decoupling are necessary. Further investigations concerning the biasing is discussed which is necessary to linearize the force current characteristic.