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논문 기본 정보

자료유형
학술저널
저자정보
Xi Zhang (Changzhou University) Zhongwei Zhang (Changzhou University) Bocheng Bao (Changzhou University) Han Bao (Changzhou University) Zhimin Wu (Changzhou University) Kaiwen Yao (Changzhou University) Jing Wu (Changzhou University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.19 No.4
발행연도
2019.7
수록면
869 - 880 (12page)

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초록· 키워드

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Due to the inherent feedforward of load current, capacitor current (CC) control shows a fast transient response that makes it suitable for the power supplies used in various portable electronic devices. However, considering the effect of the outer voltage loop, the stable range of the duty-cycle is significantly diminished in CC controlled buck converters. To investigate the stability effect of the outer voltage loop on buck converters, a CC controlled buck converter with a proportion-integral (PI) compensator is taken as an example, and its second-order discrete-time model is established. Based on this model, the instability caused by the duty-cycle is discussed with consideration of the outer voltage loop. Then the dynamical effects of the feedback gain of the PI compensator and the equivalent series resistance (ESR) of the output capacitor on the CC controlled buck converter with a PI compensator are studied. Furthermore, the design-oriented closed-loop stability criterion is derived. Finally, PSIM simulations and experimental results are supplied to verify the theoretical analyses.

목차

Abstract
I. INTRODUCTION
II. SYSTEM DESCRIPTION AND ITS SECOND-ORDER DISCRETE-TIME MODEL
III. STABILITY EFFECTS WITH VARIATIONS OF SPECIFIC CIRCUIT PARAMETERS
IV. CIRCUIT SIMULATIONS AND EXPERIMENTAL VERIFICATIONS
V. CONCLUSIONS
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UCI(KEPA) : I410-ECN-0101-2019-560-000867003