One-cycle decoupling control method of multi-leg switching power amplifier for magnetic bearing system
One-cycle decoupling control method of multi-leg switching power amplifier for magnetic bearing system
复制标题
磁力轴承系统多桥臂开关功率放大器一周期解耦控制方法
DOI：
10.1049/iet-epa.2018.5792
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Zhou Jie
中科院分区：
文献类型：
--
作者：
Liu Chengzi;Deng Zhiquan;Li Kexiang;Zhou Jie
多桥臂开关功率放大器（SPA）的传统电流控制算法由于不同相电流的控制是相互耦合的而变得复杂。针对这一问题，本文提出了一种基于单周控制的新型控制策略，该控制策略可以在每个控制周期内使各相的平均电流等于参考电流。由于该方法将中性臂的占空比设置为常数，因此具有动态响应快、易于控制和相电流解耦等显著优点。以一个五相六桥臂单馈系统为例，建立了系统的数学模型，分析了中性桥臂的占空比，介绍了新型控制策略的原理，并给出了详细的实现过程。因此，一个高速开关磁阻电机系统使用的磁轴承的构建来测试这种方法。仿真和实验结果均表明了该方法的简单性和有效性。
The traditional current control algorithm of the multi‐leg switching power amplifier (SPA) is complicated since the control of different phase currents is intercoupling. To address this problem, a novel control strategy based on one‐cycle control is proposed in this study, which can enforce the average current of each phase is equal to the reference in each control cycle. Since it sets the duty cycle of the neutral leg as a constant, this method presents significant advantages such as quick dynamic response, easy control and decoupling of the phase currents. Taking a five‐phase six‐leg SPA, e.g. the mathematic model of the system was built, the duty cycle of the neutral leg was analysed, the principle of the novel control strategy was introduced, and the detailed implemented process was presented. Thereby, a high‐speed switched reluctance motor system using the magnetic bearing is constructed to test this method. Both the simulation and experimental results have demonstrated the simplicity and effectiveness of the proposed method.