EPE Association: EPE 2014 - LS1e: Power Supplies

EPE 2014 - LS1e: Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2014 ECCE Europe - Conference > EPE 2014 - Topic 07: Power Supplies > EPE 2014 - LS1e: Power Supplies

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   Contactless DC Connector based on ISOPIPOS Topology for High Power Density 380 V DC Power Feeding System
By Yusuke HAYASHI, Toyoda HAJIME, Ise TOSHIFUMI, Matsumoto AKIRA [View]
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Abstract: Contactless DC connector has been proposed for high power density 380 V DC power feeding system. A LLC resonant DCDC converter topology with GaN power transistors and SiSBDs has been applied to realize high frequency and high efficiency inductivelycoupled contactless DC connector. ISOP (input series and output parallel)IPOS (input parallel and output series) connection topology has been also employed to develop 380 V DC connector. Prototype of a 1.2 kW 384 V192 V DC connector to constitute a part of 384 V384 V connector has been fabricated, and maximum efficiency of 96.5\% with the ideal power density of 5.4 W/cm3 has been confirmed experimentally under 500 kHz operation. Design consideration for the proposed connector has been also conducted, and the approach for achieving higher power density of 10 W/cm3 has been presented.

   Full-Bridge Dc-Dc Converter with Planar Transformer and Center-Tap Rectifier for Fuel Cell Powered Uninterruptible Power Supply
By Martin ROSEKEIT [View]
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Abstract: Full-Bridge Dc-Dc Converter with Planar Transformer and Center-Tap Rectifier for Fuel Cell Powered Uninterruptible Power Supply

   Integrated high step-down multiphase buck converter with high power density
By Giacomo CALABRESE, Maurizio GRANATO, Giovanni FRATTINI, Lorenzo CAPINERI [View]
[Download]

Abstract: A novel integrated implementation of a high step-down multiphase buck for low voltage power supplyis presented. The design and test chip measurements of a [10.8, 16]V to [0.65, 2]V, 2A, 10 MHz, 25.6mW/mm2, four-phases single-chip solution are presented with considerations on architecture, passivecomponents, problems related to high frequency integration and relative improvements on power densitywith respect to previous solutions.

   Minimization of the transformer inter-winding parasitic capacitance for modular stacking power supply applications
By Khiem NGUYEN-DUY, Ziwei OUYANG, Arnold KNOTT, Michael ANDERSEN [View]
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Abstract: In an isolated power supply, the inter-winding parasitic capacitance plays a vital role in the mitigation of common mode noise currents created by fast voltage transient responses. The lower the transformer inter-winding capacitance, the more immune the power supply is to fast voltage transient responses. This requirement is even more critical for modular stacking applications in which multiple power supplies are stacked. This paper addresses the issue by presenting a detailed analysis and design of an unconventional isolated power supply that uses a ring core transformer with a very low inter-winding parasitic capacitance of 10 pF. Considering its output power of 300 W, this approach yields about 0.033 pF/W inter-winding capacitance over output power, approximately thirty times lower than existing approaches in the literature. This makes the converter a suitable solution for modular stacking of fast voltage switching applications. Mathematical derivation of the inter-winding capacitance and experiments are carried out to prove the validity of the approach.

EPE 2014 - LS1e: Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2014 ECCE Europe - Conference > EPE 2014 - Topic 07: Power Supplies > EPE 2014 - LS1e: Power Supplies
	[return to parent folder]

	Contactless DC Connector based on ISOPIPOS Topology for High Power Density 380 V DC Power Feeding System By Yusuke HAYASHI, Toyoda HAJIME, Ise TOSHIFUMI, Matsumoto AKIRA	[View] [Download]
Abstract: Contactless DC connector has been proposed for high power density 380 V DC power feeding system. A LLC resonant DCDC converter topology with GaN power transistors and SiSBDs has been applied to realize high frequency and high efficiency inductivelycoupled contactless DC connector. ISOP (input series and output parallel)IPOS (input parallel and output series) connection topology has been also employed to develop 380 V DC connector. Prototype of a 1.2 kW 384 V192 V DC connector to constitute a part of 384 V384 V connector has been fabricated, and maximum efficiency of 96.5\% with the ideal power density of 5.4 W/cm3 has been confirmed experimentally under 500 kHz operation. Design consideration for the proposed connector has been also conducted, and the approach for achieving higher power density of 10 W/cm3 has been presented.

	Full-Bridge Dc-Dc Converter with Planar Transformer and Center-Tap Rectifier for Fuel Cell Powered Uninterruptible Power Supply By Martin ROSEKEIT	[View] [Download]
Abstract: Full-Bridge Dc-Dc Converter with Planar Transformer and Center-Tap Rectifier for Fuel Cell Powered Uninterruptible Power Supply

	Integrated high step-down multiphase buck converter with high power density By Giacomo CALABRESE, Maurizio GRANATO, Giovanni FRATTINI, Lorenzo CAPINERI	[View] [Download]
Abstract: A novel integrated implementation of a high step-down multiphase buck for low voltage power supplyis presented. The design and test chip measurements of a [10.8, 16]V to [0.65, 2]V, 2A, 10 MHz, 25.6mW/mm2, four-phases single-chip solution are presented with considerations on architecture, passivecomponents, problems related to high frequency integration and relative improvements on power densitywith respect to previous solutions.

	Minimization of the transformer inter-winding parasitic capacitance for modular stacking power supply applications By Khiem NGUYEN-DUY, Ziwei OUYANG, Arnold KNOTT, Michael ANDERSEN	[View] [Download]
Abstract: In an isolated power supply, the inter-winding parasitic capacitance plays a vital role in the mitigation of common mode noise currents created by fast voltage transient responses. The lower the transformer inter-winding capacitance, the more immune the power supply is to fast voltage transient responses. This requirement is even more critical for modular stacking applications in which multiple power supplies are stacked. This paper addresses the issue by presenting a detailed analysis and design of an unconventional isolated power supply that uses a ring core transformer with a very low inter-winding parasitic capacitance of 10 pF. Considering its output power of 300 W, this approach yields about 0.033 pF/W inter-winding capacitance over output power, approximately thirty times lower than existing approaches in the literature. This makes the converter a suitable solution for modular stacking of fast voltage switching applications. Mathematical derivation of the inter-winding capacitance and experiments are carried out to prove the validity of the approach.