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http://dx.doi.org/10.1007/s43236-021-00316-7

Fast pulse current control of multiphase pulse power supply converters using feedback linearization  

Yuan, Zhibao (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences)
Wen, Pingping (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences)
Xu, Haiping (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences)
Yuan, Zengquan (Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences)
Publication Information
Journal of Power Electronics / v.21, no.12, 2021 , pp. 1769-1779 More about this Journal
Abstract
To improve the performance of multiphase pulse power supply (MPPS) converters, a current control strategy based on feedback linearization (FL) is proposed for fat-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 fat-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.
Keywords
Feedback linearization; Multiphase paralleled; Nonlinear control; Pulse power supply;
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