EPE Association: EPE 2013 - DS3l: Energy Conversion and Conditionning Technologies in Physics Research and Related Applications

EPE 2013 - DS3l: Energy Conversion and Conditionning Technologies in Physics Research and Related Applications
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 21: Energy conversion and conditioning technologies in physics research and related applications > EPE 2013 - DS3l: Energy Conversion and Conditionning Technologies in Physics Research and Related Applications

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   4.4 AND 8 MW TWO STAGE DC THYRISTOR POWER CONVERTER WITH LOW RIPPLE AND DRIFT FOR HIGH MAGNETIC FIELD RESEARCH
By Lou VAN LIESHOUT, Walter ZUNNEBELD [View]
[Download]

Abstract: For research at high magnetic fields (>30 T) a series connection of a superconducting and resistive magnet is used, requiring high DC power (8 MW) with an extremely low current ripple (< 15 ppm) and a very high short time current stability (2 ppm of In). One single initially 4.4 MW, finally 8 MW, water-cooled thyristor converter with passive filtering is constructed and put in operation, fulfilling all demands. The 8 MW will only be operative when the load circuit will be upgraded. But the DC power supply system is ready for this future load magnet. The power supply system is fed from the public mains putting constraints on the loading thereof. The power converter will be described and design choices explained. The set-up of the control loops will be discussed and some test results presented.

   Comparison of topologies suitable for Capacitor Charging Systems
By Sebastian MAESTRI, Rogelio GARCIA RETEGUI, Jean-Marc CRAVERO, Gustavo UICICH, Mario BENEDETTI [View]
[Download]

Abstract: This paper presents a comparison between topologies suitable for capacitor charging systems.The topologies under evaluation are a flyback converter, a half-bridge series resonant converterand a full-bridge phase-shifted converter. The main features of these topologies are highlighted,which allows the proper topology selection according to the application requirements. Moreover,the performed analysis permits to characterize the operational range of the main componentsthus allowing their appropriate sizing and selection. Simulation results are provided.

   Control of high power IGBT modules in the active region for fast pulsed power converters
By Jean-Marc CRAVERO, Francisco CABALEIRO MAGALLANES, Sebastian MAESTRI, Rogelio GARCIA RETEGUI, Gustavo UICICH [View]
[Download]

Abstract: At CERN, fast pulsed power converters are used to supply trapezoidal current in different magnet loads. These converters perform output current regulation by using a high power IGBT module in its ohmic region. This paper presents a new strategy for pulsed current control applications using a specifically designed IGBT driver.

   Current source of a FFC NMR relaxometer linearly controlled
By Antonio ROQUE, Duarte SOUSA, Elmano MARGATO, Jose MAIA [View]
[Download]

Abstract: A Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer combines optimizedmagnets (low volume and power losses) and power apparatus that integrate power supplies and controlmethods.The magnet of a FFC NMR relaxometer determines the requirements of the main power supply. Asmain requirement, the magnet current should be controlled linearly in order to control the magnet fluxdensity. In addition, the current control should be accurate and having an adequate thermal stability.In this paper, framed by the main blocks that integrate a FFC NMR relaxometer, the topology of themagnet current source is presented. The operating modes and the control methodology are alsodescribed.Experimental results are presented validating the proposed solution according to the applicationrequirements. A power losses analysis supported by experimental results is performed for thegeneralized operating mode.

   Innovative use of Power Integrated Modules for DC Power Supplies
By Rasmus NIELSEN, Alexander ELKIÆR, Stig MUNK-NIELSEN, Benoit BIDOGGIA, RamKrishan MAHESHWARI, Lajos TÖRÖK [View]
[Download]

Abstract: In this article several innovative ways of utilizing Power Integrated Modules (PIMs a)s switching device in a DCpower supply are presented. PIMs have advantages in compactness of design, cost and fast prototype due toeasier PCB layout. A PIM topology is chosen and designed resulting in an experimental setup. Results from thesetup are presented showing the feasibility of using a PIM module as almost all power semiconductors in apower supply.

   Power Inverter Design for Magnetic Perturbation Coils in Nuclear Fusion Experiments
By Markus TESCHKE, Wolfgang SUTTROP, Michael ROTT, Nils ARDEN [View]
[Download]

Abstract: An economical, broad-band switched power inverter for supplying electrical current to magnetic perturbation coils in magnetic confinement nuclear fusion devices is designed and tested. The unit uses commercial IGBT blocks for a load current up to 1.3 kA at a DC-link voltage up to 500 V. Current is controlled by means of an embedded PC with real-time patched Linux operating system and commercial I/O boards. H-bridge and neutral point clamped (NPC) topologies are compared, both with standard and phase-shifted pulse width modulation (PWM). DC to 500 Hz bandwidth is demonstrated with good step response at full output current, making the system suitable for the supply of 16 in-vessel saddle coils of the ASDEX Upgrade tokamak. With multi-level topology and phase-shifted PWM the inverter design can also cover a planned additional coil set with DC to 3kHz bandwidth.

EPE 2013 - DS3l: Energy Conversion and Conditionning Technologies in Physics Research and Related Applications
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 21: Energy conversion and conditioning technologies in physics research and related applications > EPE 2013 - DS3l: Energy Conversion and Conditionning Technologies in Physics Research and Related Applications
	[return to parent folder]

	4.4 AND 8 MW TWO STAGE DC THYRISTOR POWER CONVERTER WITH LOW RIPPLE AND DRIFT FOR HIGH MAGNETIC FIELD RESEARCH By Lou VAN LIESHOUT, Walter ZUNNEBELD	[View] [Download]
Abstract: For research at high magnetic fields (>30 T) a series connection of a superconducting and resistive magnet is used, requiring high DC power (8 MW) with an extremely low current ripple (< 15 ppm) and a very high short time current stability (2 ppm of In). One single initially 4.4 MW, finally 8 MW, water-cooled thyristor converter with passive filtering is constructed and put in operation, fulfilling all demands. The 8 MW will only be operative when the load circuit will be upgraded. But the DC power supply system is ready for this future load magnet. The power supply system is fed from the public mains putting constraints on the loading thereof. The power converter will be described and design choices explained. The set-up of the control loops will be discussed and some test results presented.

	Comparison of topologies suitable for Capacitor Charging Systems By Sebastian MAESTRI, Rogelio GARCIA RETEGUI, Jean-Marc CRAVERO, Gustavo UICICH, Mario BENEDETTI	[View] [Download]
Abstract: This paper presents a comparison between topologies suitable for capacitor charging systems.The topologies under evaluation are a flyback converter, a half-bridge series resonant converterand a full-bridge phase-shifted converter. The main features of these topologies are highlighted,which allows the proper topology selection according to the application requirements. Moreover,the performed analysis permits to characterize the operational range of the main componentsthus allowing their appropriate sizing and selection. Simulation results are provided.

	Control of high power IGBT modules in the active region for fast pulsed power converters By Jean-Marc CRAVERO, Francisco CABALEIRO MAGALLANES, Sebastian MAESTRI, Rogelio GARCIA RETEGUI, Gustavo UICICH	[View] [Download]
Abstract: At CERN, fast pulsed power converters are used to supply trapezoidal current in different magnet loads. These converters perform output current regulation by using a high power IGBT module in its ohmic region. This paper presents a new strategy for pulsed current control applications using a specifically designed IGBT driver.

	Current source of a FFC NMR relaxometer linearly controlled By Antonio ROQUE, Duarte SOUSA, Elmano MARGATO, Jose MAIA	[View] [Download]
Abstract: A Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer combines optimizedmagnets (low volume and power losses) and power apparatus that integrate power supplies and controlmethods.The magnet of a FFC NMR relaxometer determines the requirements of the main power supply. Asmain requirement, the magnet current should be controlled linearly in order to control the magnet fluxdensity. In addition, the current control should be accurate and having an adequate thermal stability.In this paper, framed by the main blocks that integrate a FFC NMR relaxometer, the topology of themagnet current source is presented. The operating modes and the control methodology are alsodescribed.Experimental results are presented validating the proposed solution according to the applicationrequirements. A power losses analysis supported by experimental results is performed for thegeneralized operating mode.

	Innovative use of Power Integrated Modules for DC Power Supplies By Rasmus NIELSEN, Alexander ELKIÆR, Stig MUNK-NIELSEN, Benoit BIDOGGIA, RamKrishan MAHESHWARI, Lajos TÖRÖK	[View] [Download]
Abstract: In this article several innovative ways of utilizing Power Integrated Modules (PIMs a)s switching device in a DCpower supply are presented. PIMs have advantages in compactness of design, cost and fast prototype due toeasier PCB layout. A PIM topology is chosen and designed resulting in an experimental setup. Results from thesetup are presented showing the feasibility of using a PIM module as almost all power semiconductors in apower supply.

	Power Inverter Design for Magnetic Perturbation Coils in Nuclear Fusion Experiments By Markus TESCHKE, Wolfgang SUTTROP, Michael ROTT, Nils ARDEN	[View] [Download]
Abstract: An economical, broad-band switched power inverter for supplying electrical current to magnetic perturbation coils in magnetic confinement nuclear fusion devices is designed and tested. The unit uses commercial IGBT blocks for a load current up to 1.3 kA at a DC-link voltage up to 500 V. Current is controlled by means of an embedded PC with real-time patched Linux operating system and commercial I/O boards. H-bridge and neutral point clamped (NPC) topologies are compared, both with standard and phase-shifted pulse width modulation (PWM). DC to 500 Hz bandwidth is demonstrated with good step response at full output current, making the system suitable for the supply of 16 in-vessel saddle coils of the ASDEX Upgrade tokamak. With multi-level topology and phase-shifted PWM the inverter design can also cover a planned additional coil set with DC to 3kHz bandwidth.