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EPE 2017 - LS3c: DC/DC Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 02: Power Converter Topologies and Design > EPE 2017 - LS3c: DC/DC Converters
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	A DC/DC Modular-Multilevel Converter for DC Grid   By Yang GAO	[View]   [Download]
Abstract: A modular-multilevel (MMC) DC/DC converter is proposed in this paper, which can be deployed to inter-connect DC grid of different voltage levels, especially in the new energy sources such as wind power and solar power grid connection. Its key features include: 1) step-up and step-down operation. 2) bi-directional power flowing. 3) bi-directional fault blocking similar to a DC breaker. The operation principle of DC/DC MMC is analyzed, and a control strategy is proposed to ensure power balance of every sub module capacitor. Simulations are performed with Matlab-Simulik to validate the principle of operation and the proposed control strategy.
	A Novel Single Switch Transformerless Quadratic DC/DC Buck-Boost Converter   By Saman A. GORJI	[View]   [Download]
Abstract: A novel quadratic buck-boost DC/DC converter is presented in this study. The proposed converter utilizes only one active switch and can step-up/down the input voltage, while the existing single switch quadratic buck/boost converters can only work in step-up or step-down mode. First, the proposed converter is analyzed in steady-state. Then, its performance is validated using simulations in MATLAB/Simulink software. Finally, an experimental prototype is built for further verification.
	Isolated DC-DC Converter based on Silicon Carbide for advanced multilevel topologies   By ITZIAR KORTAZAR	[View]   [Download]
Abstract: This paper presents the design and optimization of an isolated DC-DC converter that could be potentially selected for advanced multilevel topologies for offshore wind turbine applications.The superior properties of Silicon Carbide material in terms of switching speed, voltage withstand and efficiency provides the possibility to develop a highly optimized DC-DC converter.
	Modulation Strategy of Dual Active Bridge DC-DC Converter for a Complete Zero Voltage Switching Operation   By Muhammad Hazarul AZMEER BIN AB MALEK	[View]   [Download]
Abstract: A dual active bridge (DAB) dc-dc converter has a limited soft-switching range and high circulatingcurrent with the conventional phase shift modulation (PSM) when a voltage variation occurs in theinput/output voltage. To overcome these issues, single pulse-width modulation (SPWM) and dualpulse-width modulation (DPWM) were proposed and combined into one modulation strategy calledcombined pulse-width modulation (CPWM). However, this modulation strategy still operates in thehard-switching at the low power transfer with the DPWM. This paper modifies the DPWM to operatein a complete zero voltage switching (ZVS) operation. The efficiency of the modified DPWM arecompared with a prototype for buck and boost operation. The experiment results demonstrate theincrease in the efficiency with the modified modulation strategy by operating in a complete ZVS evenif the voltage variation occurs in the input/output voltage.