Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics.
Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics.
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DOI：
10.1016/j.isatra.2015.05.004
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发表时间：
2015-09
期刊：
影响因子：
7.3
通讯作者：
L. Amezquita-Brooks;E. Licéaga-Castro;J. Liceaga-Castro;C. E. Ugalde-Loo
中科院分区：
文献类型：
--
作者：
L. Amezquita-Brooks;E. Licéaga-Castro;J. Liceaga-Castro;C. E. Ugalde-Loo
磁场定向控制（FOC）是电机最成功的控制方案之一。本文通过研究异步电机磁链-转矩子系统的交叉耦合，揭示了异步电机矢量控制方法的新特性。通过使用基于频率的多变量工具，它表明，FOC具有固有的定子电流扰动抑制性能，由于存在的传输零点的磁通转矩子系统。可以利用这些属性来选择适当的反馈回路配置。FOC格式的一个主要缺点是对滑移角速度扰动的敏感性很高。这些扰动与转子时间常数的变化有关，已知这对于IM控制是有问题的。在这方面，滑移角速度扰动对新发现的扰动抑制特性的影响也进行了研究。特别是，虽然扰动抑制保持，偏差的平衡点诱导，这引入了困难的同时磁通和转矩控制。本文首次证明了磁通和转矩同时控制时存在的平衡点问题。
Field oriented control(FOC) is one of the most successful control schemes for electrical machines. In this article new properties of FOC schemes for induction motors (IMs) are revealed by studying the cross-coupling of the flux-torque subsystem. Through the use of frequency-based multivariable tools, it is shown that FOC has intrinsic stator currents disturbance rejection properties due to the existence of atransmission zeroin the flux-torque subsystem. These properties can be exploited in order to select appropriate feedback loop configurations. One of the major drawbacks of FOC schemes is their high sensitivity to slip angular velocity perturbations. These perturbations are related to variations of the rotor time constant, which are known to be problematic for IM control. In this regard, the effect that slip angular velocity perturbations have over the newly found perturbation rejection properties is also studied. In particular, although perturbation rejection is maintained, deviations to the equilibrium point are induced; this introduces difficulties for simultaneous flux and torque control. The existence of equilibrium point issues when flux and torque are simultaneously controlled is documented for the first time in this article.