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- 저자 : Santha Karuppiah (검색결과 2 건)
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Analysis of dual‑input three‑port isolated DC–DC converter with bidirectional capability
Arulmozhi Subramanian,Santha Karuppiah 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.4
Multiport converters gain prominent importance in electric vehicle (EV) and DC micro-grid applications for their capability to integrate multiple renewable power sources and energy storage systems. The stored energy in the battery balances the load demand during intermittent power generation from the photovoltaic (PV) source. However, charging the drained battery in the complete absence of PV power interrupts the overall operation of the system. Hence, a modified dual-input three-port isolated bidirectional converter is proposed to handle bidirectional power transfer in the output port and to utilize available power for battery charging. Implementation of a mode selection logic controller with optimal maximum power point tracking and pulse width modulated controllers improves the reliability of the converter. The equivalent circuit of the proposed topology and its mathematical model help evaluate the loss of components at different conduction intervals. The computed device losses, inductor and capacitor equivalent series resistance losses, and other losses clearly depict the effect on the performance of the proposed converter. Thus, the predicted efficiency is validated by the experimental data of the laboratory prototype, substantiating the performance of the converter.
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Modified high-efficiency bidirectional DC-DC converter topology
Somalinga, Sethuraman S.,Santha, Karuppiah The Korean Institute of Power Electronics 2021 JOURNAL OF POWER ELECTRONICS Vol.21 No.1
A modified topology to obtain a high efficiency bidirectional type DC-DC converter without magnetic coupling is proposed in this paper. The modified circuit contains four switches with their body diodes, two inductors and a capacitor, and the topology arrangement uses two boost converters to develop the gain. The input current of the modified topology is divided between two different values of inductors, which results in high efficiency. In the buck mode, an obvious reduction in the voltage gain and an improved efficiency can be seen using synchronous rectification. The modified topology improves performance, allows for easy control structures and can be used in low output voltage high current battery charging applications. Simulations of the proposed system have been carried out through MATLAB/SIMULINK software. In addition, it has been validated through a 12 V/120 V, 40 W prototype circuit.
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