EPE Association: EPE 2016 - DS1h: DC Power Supplies

EPE 2016 - DS1h: DC Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 07: Power Supplies > EPE 2016 - DS1h: DC Power Supplies

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   A 2W, 5MHz, PCB-Integration Compatible 2.64cm3 Regulated and Isolated Power Supply for Gate Driver
By Nicolas DEGRENNE [View]
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Abstract: This paper presents an isolated power supply unit for high-side gate driver. It generates a bipolar voltage level (+15V/-5V) and an auxiliary voltage level of +5V. The LLC topology is used at fixed frequency of 5MHz. A voltage control based on switched resonant tank is used to compensate voltage drops in the converter at high load currents. This new control strategy allows using a simple feedback loop where isolation is performed by a control transformer which is integrated with the main power transformer. The paper thus demonstrates a custom concentric planar dual transformer. Its magnetic material is made with molded ferrite/epoxy composite. The magnetic material is formed in situ with a low-temperature PCB-compatible process. The other components of the converter are off-the-shelf discrete components. The supply is implemented with GaN MOSFETs that allow higher efficiency and better output voltage control than Si devices at high switching frequency. The power supply is built as a stack of 3 PCBs, has a power density of 0.76W/cm3 (12.45W/In3), and is intended to be part of the design of highly integrated PCB-based converters.

   Comparison Between Dissipative Snubber and Passive Regenerative Snubber Cells as Applied to Isolated DCM SEPIC Converters
By Gabriel TIBOLA [View]
[Download]

Abstract: This paper presents the comparison between dissipative RCD and passive regenerative snubber cells for isolated SEPIC converters. The passive cell is intended to improve the converter's efficiency by transferring the energy stored in the transformer leakage inductance to the converter output. The analysis for both snubbers are detailed including design guidelines. In order to validate the regenerative proposal and compare its feasibility, experimental verification is performed for both snubbers on a 100 W, 100 V input and 50 V output voltage SEPIC converter operating in DCM.

   Design and Implementation of Magnetron Power Supply and Emulator
By Nourdeen ABODHIR [View]
[Download]

Abstract: The paper presents a novel resonant based high performance power converter solution for industrial magnetron systems. Based the characteristics of the magnetron, an emulator prototype is also proposed to represent the magnetron load behavior in a laboratory environment. A detailed design and implementation procedure is presented, including the design and control of the resonant power converter, together with the magnetron emulator in practical aspects. Experimental results are provided in order to demonstrate the feasibility of the proposed converter and emulator.

   Effect of secondary circuit in LLC DC-DC Converter
By Kyungmin SUNG [View]
[Download]

Abstract: In this paper, rectification methods for secondary side of LLC DC-DC converter are considered in order to achieve high efficiency and high output power. Firstly, two types of synchronous rectifier methods are compared. One is Center-Tapped synchronous Rectifier (CTR) and the other is Current-Doubler synchronous Rectifier (CDT) method. Also, two prototypes of converter are implemented and tested in same conditions. Next, behaviors of switching devices and power loss of these two rectifications are presented.

   Galvanically isolated MPPT DC/DC converter for PV string tied to industrial DC micro-grid
By Andrew STEPANOV [View]
[Download]

Abstract: This paper concerns to the research project where experimental 600VDC microgrid that simulates industrial assembly line is built. The purpose of the project is to improve efficiency of manufacturing robotic assembly line and to integrate alternative energy sources. As there is hard to find on the market DC/DC MPPT converter that could be tied to 600VDC microgrid, this paper describes the design of such MPPT DC/DC converter and it main challenges like efficiency. Simulation and experimental results are given in the paper.

   Modeling a multilevel converter for radiography and fluoroscopy
By Juan Antonio MARTIN-RAMOS [View]
[Download]

Abstract: In this paper a mathematical model for a resonant multilevel converter is presented. The topology has been conceived to be used in X-ray power supplies. The power stage has been designed to minimize the resonant current throughout the input voltage range: 400V to 750V. The inverter stage is based on the series-parallel resonant topology, LCC, to include the parasitic elements of the step-up transformer. However, the introduction of an additional magnetic coupling provides a way to modify the reactive elements depending on the output power.

EPE 2016 - DS1h: DC Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 07: Power Supplies > EPE 2016 - DS1h: DC Power Supplies
	[return to parent folder]

	A 2W, 5MHz, PCB-Integration Compatible 2.64cm3 Regulated and Isolated Power Supply for Gate Driver By Nicolas DEGRENNE	[View] [Download]
Abstract: This paper presents an isolated power supply unit for high-side gate driver. It generates a bipolar voltage level (+15V/-5V) and an auxiliary voltage level of +5V. The LLC topology is used at fixed frequency of 5MHz. A voltage control based on switched resonant tank is used to compensate voltage drops in the converter at high load currents. This new control strategy allows using a simple feedback loop where isolation is performed by a control transformer which is integrated with the main power transformer. The paper thus demonstrates a custom concentric planar dual transformer. Its magnetic material is made with molded ferrite/epoxy composite. The magnetic material is formed in situ with a low-temperature PCB-compatible process. The other components of the converter are off-the-shelf discrete components. The supply is implemented with GaN MOSFETs that allow higher efficiency and better output voltage control than Si devices at high switching frequency. The power supply is built as a stack of 3 PCBs, has a power density of 0.76W/cm3 (12.45W/In3), and is intended to be part of the design of highly integrated PCB-based converters.

	Comparison Between Dissipative Snubber and Passive Regenerative Snubber Cells as Applied to Isolated DCM SEPIC Converters By Gabriel TIBOLA	[View] [Download]
Abstract: This paper presents the comparison between dissipative RCD and passive regenerative snubber cells for isolated SEPIC converters. The passive cell is intended to improve the converter's efficiency by transferring the energy stored in the transformer leakage inductance to the converter output. The analysis for both snubbers are detailed including design guidelines. In order to validate the regenerative proposal and compare its feasibility, experimental verification is performed for both snubbers on a 100 W, 100 V input and 50 V output voltage SEPIC converter operating in DCM.

	Design and Implementation of Magnetron Power Supply and Emulator By Nourdeen ABODHIR	[View] [Download]
Abstract: The paper presents a novel resonant based high performance power converter solution for industrial magnetron systems. Based the characteristics of the magnetron, an emulator prototype is also proposed to represent the magnetron load behavior in a laboratory environment. A detailed design and implementation procedure is presented, including the design and control of the resonant power converter, together with the magnetron emulator in practical aspects. Experimental results are provided in order to demonstrate the feasibility of the proposed converter and emulator.

	Effect of secondary circuit in LLC DC-DC Converter By Kyungmin SUNG	[View] [Download]
Abstract: In this paper, rectification methods for secondary side of LLC DC-DC converter are considered in order to achieve high efficiency and high output power. Firstly, two types of synchronous rectifier methods are compared. One is Center-Tapped synchronous Rectifier (CTR) and the other is Current-Doubler synchronous Rectifier (CDT) method. Also, two prototypes of converter are implemented and tested in same conditions. Next, behaviors of switching devices and power loss of these two rectifications are presented.

	Galvanically isolated MPPT DC/DC converter for PV string tied to industrial DC micro-grid By Andrew STEPANOV	[View] [Download]
Abstract: This paper concerns to the research project where experimental 600VDC microgrid that simulates industrial assembly line is built. The purpose of the project is to improve efficiency of manufacturing robotic assembly line and to integrate alternative energy sources. As there is hard to find on the market DC/DC MPPT converter that could be tied to 600VDC microgrid, this paper describes the design of such MPPT DC/DC converter and it main challenges like efficiency. Simulation and experimental results are given in the paper.

	Modeling a multilevel converter for radiography and fluoroscopy By Juan Antonio MARTIN-RAMOS	[View] [Download]
Abstract: In this paper a mathematical model for a resonant multilevel converter is presented. The topology has been conceived to be used in X-ray power supplies. The power stage has been designed to minimize the resonant current throughout the input voltage range: 400V to 750V. The inverter stage is based on the series-parallel resonant topology, LCC, to include the parasitic elements of the step-up transformer. However, the introduction of an additional magnetic coupling provides a way to modify the reactive elements depending on the output power.