基于数字状态反馈的中频逆变电源等效输出阻抗优化技术研究

张琦 1,, 侯 蕾1, 戴 伟2, 刘菲 菲2, 龙泽 坤2
1. 西安理工大学电气工程学院 陕西省西安 710048；2.新疆希望电子有限公司博士后科研工作站 新疆乌鲁木齐 830000

摘要

受制于数字控制带宽的限制，中频逆变电源在数字化控制过程中容易受到高频扰动的影响，从而在面对非线性负载等扰动时存在严重的谐波畸变问题。针对此问题，本文分别建立系统的频域和离散域数学模型，分析了系统等效输出阻抗与扰动传递函数之间的关系和在传统的数字状态反馈控制条件下各状态反馈系数的定量取值依据，并给出等效输出阻抗的制约因素。然后对电容电流状态反馈环路实施数字相位补偿，并加入重复控制器，设计了应用于中频逆变电源的复合控制器。最后，通过仿真与实验验证了研究方法的可行性与有效性。

关键词

中频逆变电源；输出阻抗；相位补偿；重复控制

参考

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