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Fast pulse current control of multiphase pulse power supply converters using feedback linearization
Journal of Power Electronics ( IF 1.4 ) Pub Date : 2021-10-25 , DOI: 10.1007/s43236-021-00316-7
Zhibao Yuan 1, 2 , Pingping Wen 1, 2 , Haiping Xu 1 , Zengquan Yuan 1
Affiliation  

To improve the performance of multiphase pulse power supply (MPPS) converters, a current control strategy based on feedback linearization (FL) is proposed for flat-top current control by using an average model of the MPPS converter in this study. A nonlinear state function model of a MPPS converter is presented and transformed to a linearized and decoupled form with the input–output feedback linearization technique. Based on the linearized system, simple linear controllers are designed to regulate the current among different phases and output current of the MPPS, which significantly reduces the difficulty in controller design and tuning. Moreover, a pre-charge method is adopted to improve current rising edge, which improves the current response of the flat-top current control. To test its effectiveness, the proposed strategy is employed in a 10 kW MPPS prototype. When compared to the conventional PI-based current control for MPPS converters, the proposed strategy provides a better dynamic performance in terms of current regulation and its flexibility can be extended to any of the paralleled phases of a MPPS system.



中文翻译:

使用反馈线性化的多相脉冲电源转换器的快速脉冲电流控制

为了提高多相脉冲电源 (MPPS) 转换器的性能,本研究中使用 MPPS 转换器的平均模型提出了一种基于反馈线性化 (FL) 的电流控制策略,用于平顶电流控制。提出了 MPPS 转换器的非线性状态函数模型,并使用输入-输出反馈线性化技术将其转换为线性化和解耦形式。在线性化系统的基础上,设计了简单的线性控制器来调节MPPS不同相间的电流和输出电流,大大降低了控制器设计和整定的难度。此外,采用预充电方式改善电流上升沿,提高了平顶电流控制的电流响应。为了测试它的有效性,建议的策略用于 10 kW MPPS 原型。与用于 MPPS 转换器的传统基于 PI 的电流控制相比,所提出的策略在电流调节方面提供了更好的动态性能,并且其灵活性可以扩展到 MPPS 系统的任何并联相位。

更新日期:2021-10-26
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