EPE Association: EPE 2015 - LS2e: Low Voltage DC Power Supplies

EPE 2015 - LS2e: Low Voltage DC Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 07: Power Supplies > EPE 2015 - LS2e: Low Voltage DC Power Supplies

   [return to parent folder]

   Accelerated lifetime testing of energy storage capacitors used in particle accelerators power converters
By Fulvio BOATTINI [View]
[Download]

Abstract: Energy storage capacitors are used in large quantities in high power converters for particle accelerators. In this application capacitors see neither a DC nor an AC voltage but a combination of the two. The paper presents a new power converter explicitly designed to perform accelerated testing on these capacitors and the results of the tests.

   Auxiliary Power Supply for Medium-Voltage Modular Multilevel Converters
By Dimosthenis PEFTITSIS [View]
[Download]

Abstract: Design considerations for a modularized auxiliary power supply suitable for variable voltage modular multilevel converters, in terms of electrical performance and isolation against high voltages, are presented. In the presented auxiliary supply, an LLC resonant converter along with several individual floated voltage sources containing high-frequency and high-voltage-isolation transformers are employed. The design process of the individual floating voltage sources is based on circuit and FEM simulations. Partial discharge measurements are also shown for the proposed high-voltage transformer design. Last but not least, electrical measurements performed on a down-scaled laboratory prototype reveal the stable and proper operation of the system at various operating points.

   New control method of bidirectional isolated dc/dc converter - Control system which can obtain output voltage much higher than winding ratio of transformer -
By YOSHITAKA KAWABATA [View]
[Download]

Abstract: A new control system of the bidirectional isolated dc/dc converter will be presented. The output terminals of two single phase bridge inverter A and B are connected through an isolated transformer, and the pulse width of the inverter of higher d.c. voltage is narrowed to make equal the fundamental a.c. voltage of both inverters.

   Optimizing design of converters using power cycling lifetime models
By Rasmus Ørndrup NIELSEN [View]
[Download]

Abstract: Converter power cycling lifetime depends heavily on converter operation point. A lifetime model of a single power module switched mode power supply with wide input voltage range is shown. A lifetime model is created using a power loss model, a thermal model and a model for power cycling capability with a given mission profile. A method to improve the expected lifetime of the converter is presented, taking into account switching frequency, input voltage and transformer turns ratio.

EPE 2015 - LS2e: Low Voltage DC Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 07: Power Supplies > EPE 2015 - LS2e: Low Voltage DC Power Supplies
	[return to parent folder]

	Accelerated lifetime testing of energy storage capacitors used in particle accelerators power converters By Fulvio BOATTINI	[View] [Download]
Abstract: Energy storage capacitors are used in large quantities in high power converters for particle accelerators. In this application capacitors see neither a DC nor an AC voltage but a combination of the two. The paper presents a new power converter explicitly designed to perform accelerated testing on these capacitors and the results of the tests.

	Auxiliary Power Supply for Medium-Voltage Modular Multilevel Converters By Dimosthenis PEFTITSIS	[View] [Download]
Abstract: Design considerations for a modularized auxiliary power supply suitable for variable voltage modular multilevel converters, in terms of electrical performance and isolation against high voltages, are presented. In the presented auxiliary supply, an LLC resonant converter along with several individual floated voltage sources containing high-frequency and high-voltage-isolation transformers are employed. The design process of the individual floating voltage sources is based on circuit and FEM simulations. Partial discharge measurements are also shown for the proposed high-voltage transformer design. Last but not least, electrical measurements performed on a down-scaled laboratory prototype reveal the stable and proper operation of the system at various operating points.

	New control method of bidirectional isolated dc/dc converter - Control system which can obtain output voltage much higher than winding ratio of transformer - By YOSHITAKA KAWABATA	[View] [Download]
Abstract: A new control system of the bidirectional isolated dc/dc converter will be presented. The output terminals of two single phase bridge inverter A and B are connected through an isolated transformer, and the pulse width of the inverter of higher d.c. voltage is narrowed to make equal the fundamental a.c. voltage of both inverters.

	Optimizing design of converters using power cycling lifetime models By Rasmus Ørndrup NIELSEN	[View] [Download]
Abstract: Converter power cycling lifetime depends heavily on converter operation point. A lifetime model of a single power module switched mode power supply with wide input voltage range is shown. A lifetime model is created using a power loss model, a thermal model and a model for power cycling capability with a given mission profile. A method to improve the expected lifetime of the converter is presented, taking into account switching frequency, input voltage and transformer turns ratio.