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자료유형
학술저널
저자정보
Ming-Rong Lee (Far East University) Lung-Sheng Yang (Far East University) Chia-Ching Lin (Far East University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.13 No.4
발행연도
2013.7
수록면
592 - 599 (8page)

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초록· 키워드

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This paper investigates a new isolated single-phase AC-DC converter, which integrates a modified AC-DC buck-boost converter with a DC-DC forward converter. The front semi-stage is operated in discontinuous conduction mode (DCM) to achieve an almost unity power factor and a low total harmonic distortion of the input current. The rear semi-stage is used for step-down voltage conversion and electrical isolation. The front semi-stage uses a coupled inductor with the same winding-turn in the primary and secondary sides, which is charged in series during the switch-on period and is discharged in parallel during the switch-off period. The discharging time can be shortened. In other words, the duty ratio can be extended. This semi-stage can be operated in a larger duty-ratio range than the conventional AC-DC buck-boost converter for DCM operation. Therefore, the proposed converter is suitable for universal input voltage (90~264 V<SUB>rms</SUB>) and a wide output-power range. Moreover, the voltage stress on the DC-link capacitor is low. Finally, a prototype circuit is implemented to verify the performance of the proposed converter.

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Abstract
I. INTRODUCTION
II. OPERATING PRINCIPLE
III. STEADY-STATE ANALYSIS
IV. SELECTIONS OF INDUCTORS AND CAPACITORS
V. EXPERIMENTAL RESULTS
VI. CONCLUSIONS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2014-500-003213450