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논문 기본 정보

자료유형
학술저널
저자정보
Shuhan Zhou (Southwest Jiaotong University) Guohua Zhou (Southwest Jiaotong University) Shaohuan Zeng (Southwest Jiaotong University) Shungang Xu (Southwest Jiaotong University) Taiqiang Cao (Xihua University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.19 No.1
발행연도
2019.1
수록면
190 - 200 (11page)

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The flyback converter, which can be regarded as a nonlinear time-varying system, has complex dynamics and nonlinear behaviors. These phenomena can affect the stability of the converter. To simplify the modeling process and retain the information of the output capacitor branch, a special sampled-data model of a peak current-mode (PCM) controlled flyback converter is established in this paper. Based on this, its dynamic behaviors are analyzed, which provides guidance for designing the circuit parameters of the converter. With the critical stability boundary equation derived by a Jacobian matrix, the stable operation range with a varied output capacitor, proportional coefficient of error the amplifier, input voltage, reference voltage and slope of the compensation ramp of a PCM controlled flyback converter are investigated in detail. Research results show that the duty ratio should be less than 0.5 for a PCM controlled flyback converter without ramp compensation to operate in a stable state. The stability regions in the parameter space between the output capacitor and the proportional coefficient of the error amplifier are enlarged by increasing the input voltage or by decreasing the reference voltage. Furthermore, the ramp compensation also can extend to the stable region. Finally, time-domain simulations and experimental results are presented to verify the theoretical analysis results.

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Abstract
Ⅰ. INTRODUCTION
Ⅱ. SAMPLED-DATA MODELING OF A PCM CONTROLLED FLYBACK CONVERTER WITH RAMP COMPENSATION
Ⅲ. DYNAMIC ANALYSIS
Ⅳ. BOUNDARY EQUATIONS AND OPERATING-STATE REGIONS
Ⅴ. SIMULATION AND EXPERIMENTAL RESULTS
Ⅵ. CONCLUSIONS
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