EPE Association: EPE 2011 - LS1f: Topic 17: DC and Distributed Power Supplies

EPE 2011 - LS1f: Topic 17: DC and Distributed Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 17: Power supplies > EPE 2011 - LS1f: Topic 17: DC and Distributed Power Supplies

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   Analysis and Evaluation of Interleaved Class D-E Resonoant Converter
By Li-Ming WU, Wei-Shi LUO, Huan-Ji CHIOU [View]
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Abstract: In this paper an interleaved Class D-E resonant converter is proposed. Analysis, design, and evaluation of the proposed converter are presented. The interleaving approach utilizes two half-bridges to dislocate two resonant tanks in the Class D inverters, which results in a single control unit and a 180 degree phase-shift switching angle designs in the proposed topology. While the analog control method is adopted to regulate the converter, the digital control is applied as well to evaluate converter efficiency. The ring oscillation phenomenon that usually appears in the Class E rectifier is eliminated for energy conservation. As a result, the output ripple voltage and current of the interleaved converter are improved by at least 50\%, as compared to that of the non-interleaved counterpart. In addition, the interleaved converter gains 6\% more efficiency over that of the non-interleaved counterpart. The maximum efficiency of the analog interleaved converter occurs at full load with value up to 92.2\%. The results of analysis and design are verified experimentally on three 180W/19V interleaved and non-interleaved converters.

   Buck Type (8kA, 10V) High Frequency Quasi Resonant Converter
By Ilknur COLAK [View]
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Abstract: Submarine lead-acid batteries need high current, low voltage battery chargers with high DC stability and high dynamic response at low level ripple. A buck type phase shift pulse-width modulated switching quasi-resonant converter is presented in this paper. Switching principles and operation modes of the proposed system are described with design based analysis. The experimental results of a 8kA, 10V modular converter are presented to verify the feasibility of the proposed system.

   Optimisation of a Distributed Generation Power Pack Using a Novel Dynamic System Model including Efficiency Characteristics
By Christopher HILL, Pericle ZANCHETTA, Serhiy BOZHKO, Jing LI [View]
[Download]

Abstract: Distributed diesel generation is still widely used to supply electric power in a variety of applications. These applications range from backup power supply systems and combined wind-diesel generation to providing power in places where grid connection is either technically impractical or financially uneconomic. Due to the ever increasing cost of diesel fuel and the environmental issues associated with its use, the optimisation of these AC generators and the reduction of fuel consumption is vital. Modelling and optimisation of such systems as a whole has always been extremely difficult due to the long-time load profiles needed and the computational difficulty of associating small time-constant electrical dynamics with large time-constant mechanical dynamics. This paper presents the use of an accelerated dynamic modelling technique which is able to accurately model these long-time load profiles and overcome these computational difficulties. These models are combined with measured efficiency characteristics and an optimisation algorithm in order to optimise a distributed generation power pack and substantially reduce fuel consumption.

EPE 2011 - LS1f: Topic 17: DC and Distributed Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 17: Power supplies > EPE 2011 - LS1f: Topic 17: DC and Distributed Power Supplies
	[return to parent folder]

	Analysis and Evaluation of Interleaved Class D-E Resonoant Converter By Li-Ming WU, Wei-Shi LUO, Huan-Ji CHIOU	[View] [Download]
Abstract: In this paper an interleaved Class D-E resonant converter is proposed. Analysis, design, and evaluation of the proposed converter are presented. The interleaving approach utilizes two half-bridges to dislocate two resonant tanks in the Class D inverters, which results in a single control unit and a 180 degree phase-shift switching angle designs in the proposed topology. While the analog control method is adopted to regulate the converter, the digital control is applied as well to evaluate converter efficiency. The ring oscillation phenomenon that usually appears in the Class E rectifier is eliminated for energy conservation. As a result, the output ripple voltage and current of the interleaved converter are improved by at least 50\%, as compared to that of the non-interleaved counterpart. In addition, the interleaved converter gains 6\% more efficiency over that of the non-interleaved counterpart. The maximum efficiency of the analog interleaved converter occurs at full load with value up to 92.2\%. The results of analysis and design are verified experimentally on three 180W/19V interleaved and non-interleaved converters.

	Buck Type (8kA, 10V) High Frequency Quasi Resonant Converter By Ilknur COLAK	[View] [Download]
Abstract: Submarine lead-acid batteries need high current, low voltage battery chargers with high DC stability and high dynamic response at low level ripple. A buck type phase shift pulse-width modulated switching quasi-resonant converter is presented in this paper. Switching principles and operation modes of the proposed system are described with design based analysis. The experimental results of a 8kA, 10V modular converter are presented to verify the feasibility of the proposed system.

	Optimisation of a Distributed Generation Power Pack Using a Novel Dynamic System Model including Efficiency Characteristics By Christopher HILL, Pericle ZANCHETTA, Serhiy BOZHKO, Jing LI	[View] [Download]
Abstract: Distributed diesel generation is still widely used to supply electric power in a variety of applications. These applications range from backup power supply systems and combined wind-diesel generation to providing power in places where grid connection is either technically impractical or financially uneconomic. Due to the ever increasing cost of diesel fuel and the environmental issues associated with its use, the optimisation of these AC generators and the reduction of fuel consumption is vital. Modelling and optimisation of such systems as a whole has always been extremely difficult due to the long-time load profiles needed and the computational difficulty of associating small time-constant electrical dynamics with large time-constant mechanical dynamics. This paper presents the use of an accelerated dynamic modelling technique which is able to accurately model these long-time load profiles and overcome these computational difficulties. These models are combined with measured efficiency characteristics and an optimisation algorithm in order to optimise a distributed generation power pack and substantially reduce fuel consumption.