[논문]고변압비와 고효율 특성을 가진 새로운 비절연형 벅부스트 컨버터

트란 만 투안; 사기르 아민; 최우진

doi:10.6113/tkpe.2019.24.5.319

고변압비와 고효율 특성을 가진 새로운 비절연형 벅부스트 컨버터
A Novel Non-Isolated Buck Boost Converter with High Voltage Gain and High Efficiency Characteristics 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.24 no.5, 2019년, pp.319 - 326

트란 만 투안 (Dept of Electrical Engineering, Soongsil University) , 사기르 아민 (Dept of Electrical Engineering, Soongsil University) , 최우진 (Dept of Electrical Engineering, Soongsil University)

Abstract ▼ AI-Helper

The use of high-voltage gain converters is essential for distributed power generation systems with renewable energy sources, such as fuel and solar cells, due to their low-voltage characteristics. In this study, a novel high-voltage gain non-isolated buck boost converter topology is proposed to cope with the need of a high-voltage conversion ratio without the transformer for the renewable energy sources. Given that the proposed topology utilizes the cascode structure, the voltage gain and the efficiency are higher than those of other conventional non-isolated converters. To demonstrate the feasibility of the proposed topology, the operation principle is presented, and the steady-state characteristics are analyzed in detail. The validity of the proposed converter is verified by experiments with a 400 W prototype converter.

주제어

표/그림 (14)

그림 Fig. 1. Proposed non-isolated buck-boost converter.
그림 Fig. 2. Two stage expansion of the proposed non-isolated buck-boost converter.
그림 Fig. 3. Operation mode of the proposed converter under CCM.
그림 Fig. 4. Key waveforms of proposed converter for CCM operation With D = 0.5.
그림 Fig. 5. Voltage gain vs. duty cycle of the high voltage gain converter.
표 TABLE I COMPARISON BETWEEN THE PROPOSED CONVERTER AND THE OTHER CONVERTERS
그림 Fig. 6. Simulation results of the proposed two stage NBB converter. (a) drain to source voltage V_DS3 of S₃, inductor current I_L2 of inductor L₂, (b) the drain to source voltage V_DS1 of S₁, inductor current I_L1 of inductor L₁, (c) gate signal for the switches S₁, S₂, S₃ and S₄, (d) Input current I_S, (e) Input voltage V_S, Output voltage V_o, Output capacitor 1 voltage V_C1, Output capacitor 2 voltage V_C2.
그림 Fig. 7. Prototype of the proposed two stage NBB converter.
표 TABLE II SPECIFICATION OF THE PROPOSED TWO STAGE DC-DC CONVERTER
표 TABLE III SWITCHES AND PASSIVE COMPONENTS OF THE PROPOSED CONVERTER
그림 Fig. 8. Experimental waveforms of the prototype converter: (a) Gate signals of the switches V_GS1, V_GS2, V_GS3, and V_GS4, (b) Output voltage V_O, capacitor 2 voltage V_C2, capacitor 1 voltage V_C1 and input voltage V_S.
그림 Fig. 9. Experimental waveforms of the proposed converter under two different load conditions. (a) no-load, (b) Full-load (400W).
그림 Fig. 10. Measured efficiency plot of the proposed stage NBB converter.
그림 Fig. 11. Measured efficiency curve of proposed high step-up gain converter.

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