EPE Association: EPE 2009 - Subtopic 21-2 - DS: 'Energy Conversion in Physics Research and Related Applications'

EPE 2009 - Subtopic 21-2 - DS: 'Energy Conversion in Physics Research and Related Applications'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 21: 'Energy Conversion in Physics Research and Related Applications' > EPE 2009 - Subtopic 21-2 - DS: 'Energy Conversion in Physics Research and Related Applications'

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   A NEW MULTIPLE STAGES CONVERTER TOPOLOGY FOR HIGH POWER AND HIGH PRECISION FAST PULSED CURRENT SOURCES
By Jean-Marc CRAVERO, Carlos DE ALMEIDA MARTINS, Rogelio Adrian GARCIA RETEGUI, Nicolas WASSINGER, Mario BENEDETTI [View]
[Download]

Abstract: A new high current, low rise time and high precision pulse generator is presented. The topology is based on the use of different stages, each one specific for a particular operation range in terms of power and switching frequency. The design and operating principle of the proposed topology are described. Finally, the results obtained from an implemented reduced scale prototype are compared with the simulation ones in order to validate the design.

   Electronic high-voltage pulse current generator for shock wave therapy in human medicine
By MANFRED GEKELER [View]
[Download]

Abstract: Extracorporeal Shock Wave Therapy (ESWT) is a non-invasive method for treating various ailments in the fields of urology, dermatology and orthopedics. The electro-hydraulic method is especially suitable for creating the shock wave. In a therapy head outside the human body, powerful electrical sparks are triggered. A novel electronic circuit was developed to generate the high voltages (up to 25 kV) and currents (up to 10 kA) required for this purpose. Inexpensive low-voltage standard components are exclusively employed, extending the service life of the electrodes, increasing the energy efficiency and lowering the cost of the therapeutic apparatus.

   Extension of the Operational Range of High Performance Line-Commutated Converters into Discontinuous Current Mode
By Sebastian MAESTRI, Roberto PETROCELLI, Gustavo UICICH, Mario BENEDETTI, Rogelio GARCIA RETEGUI [View]
[Download]

Abstract: A digital implementation of a method for controlling line-commutated converters in discontinuous current is presented. The proposed strategy is based on the modification of the firing angle by means of an on-line estimation of the rectifier average current. Simulations and experimental results on a current control system are presented.

   Klystron Modulator for the XFEL RF Station
By Renso WOLF, Stefan BRUINS, Werner HEYNS, Martien ROIJMANS [View]
[Download]

Abstract: For the European XFEL at DESY in Hamburg (Germany) a Klystron Modulator prototype is built, based on the proven so called â€œBouncerâ€ principle. Although it is a well known technique, the Bouncer Modulator faces some difficulties on flattop stability and protection of the Klystron. In this paper improvements for these problems are presented. Besides a chosen solution for constant input power consumption related to the pulsed output power is discussed.

   NEW MODULATOR FOR MULTI-PHASE INTERLEAVED DC/DC CONVERTERS
By Rogelio Adrian GARCIA RETEGUI, Mario BENEDETTI, Roberto PETROCELLI, nicolÃ¡s WASSINGER, SebastiÃ¡n MAESTRI [View]
[Download]

Abstract: This work introduces a new modulator for multi-phase interleaved converters, capable of tolerating abrupt changes both in the differential input-output voltage and the reference; while it reduces the interleaved adjustment time and the error during the transient. The proposed method can be applicable to high power systems.

   POWERING AND CONTROL STRATEGY FOR THE MAIN QUADRUPOLE MAGNETS OF THE LHC INNER TRIPLET SYSTEM
By HUGUES THIESEN, FREDERICK BORDRY, JEFF THOMSEN, DAVID NISBET [View]
[Download]

Abstract: The LHC particle accelerator uses a string of superconducting quadrupole magnets called the Inner Triplet to focus the beams before collision. This paper describes the powering of the magnets using nested circuits, and their control by decoupling of the currents using state feedback loops, and presents commissioning results.

   Resonant converters for pulsed electrochemical applications
By Kathryn KLEMENT, Francis DAWSON, Steven THORPE [View]
[Download]

Abstract: Resonant converters offer an efficient alternative to linear supplies for pulsed electrochemical processes. This paper presents an open loop and closed loop comparison between the dc-dc series and series-parallel resonant converters for a pulsed 500W load. Placing restrictions on the resonant tank parameters proves necessary to achieve continuous transient waveforms. Generalized averaging is applied to each converter with frequency control and the small signal models are compared. The closed loop system proves to be robust using a single mode proportional integral controller. The series-parallel resonant converter is shown to be favourable for this application due to its simpler output stage and a detailed design is presented.

   Resonant inverter with output voltage pulse-phase-shift control for DBD plasma reactor supply
By Marcin HOLUB, StanisÃ 142aw KALISIAK, Tomasz JAKUBOWSKI [View]
[Download]

Abstract: Non-thermal plasma technology systems often require high voltage, AC power supplies. Paper discusses a novel power electronic converter topology enabling high voltage, high frequency operation with resonant, quasi-phase-mode output voltage control. System topology, simulation results and experimental properties are presented and discussed.

   The High Voltage Power Supply System for the European 2MW Electron Cyclotron Test Facility
By Tullio BONICELLI, F. ALBAJAR, D. FASEL, L. RINALDI, U. SIRAVO, L. SITA, G. TADDIA [View]
[Download]

Abstract: A new power supply, PS, system has been recently installed at the European Electron Cyclotron Test Facility at CRPP, in Lausanne, Switzerland. The PS system is composed of two power converters, the Main High Voltage Power Supply (MHVPS) and the Body Power Supply (BPS), whose combined operation provides the required voltage and current, up to 100 kV and 80 A, for the operation of a high power, 2 MW, gyrotron presently under development in Europe for the ITER project. The specifications impose high accuracy on the voltage and very demanding dynamic performance from the PS system. In addition, the protection of the gyrotron, which may be subjected to internal arcs during conditioning, requires a very fast switch off and a tight limitation of the total electrical charge delivered from the converters. The MHVPS and the BPS have been subjected to extensive tests both at factory, before delivery, and on-site, after installation. All tests, performed on full power dummy loads, were passed successfully. Operation on the gyrotron will start in 2010.

   Toward the Implementation of Booster Dipole magnet power supply to 3GeV Synchrotron light source
By Udaya BHASKER MANTHATI, Oriol GOMIS-BELLMUNT, MÂ¡quel TEIXIDÃ“-CASAS, joan BERGAS-JANÃ‰, antoni SUDRIA-ANDREU [View]
[Download]

Abstract: This paper presents a simulation work and control aspects of a Booster Dipole magnet power supply to a light source. Description of structure, operation of the structure and synchronous rectification Buck converter are discussed. Voltage and Current mode controllers for one-quadrant and two-quadrant converters are proposed. Better performance results with Split-Range technique are obtained. The converters are controlled by using pulse width modulation techniques.

   Voltage enhancement of the dc power supplies for dynamic current control of large scale superconducting coils for fusion plasma experimental device LHD
By Hirotaka CHIKARAISHI, Tomoyuki INOUE, Shigeyuki TAKAMI, Kouji AOYAMA, Tomoyuki HAGA [View]
[Download]

Abstract: The LHD is a helical-type fusion plasma device using six superconducting coils to form a magnetic field. The fundamental operation of the LHD is performed under a dc magnetic field, and a power system which was suitable for steady state excitation was designed and constructed. With the progress in the fusion plasma research, more dynamic experiments are planned, and require dynamic control of magnetic field. For this purpose, the output voltages of power supplies were enhanced using additional pulse power supplies.

EPE 2009 - Subtopic 21-2 - DS: 'Energy Conversion in Physics Research and Related Applications'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 21: 'Energy Conversion in Physics Research and Related Applications' > EPE 2009 - Subtopic 21-2 - DS: 'Energy Conversion in Physics Research and Related Applications'
	[return to parent folder]

	A NEW MULTIPLE STAGES CONVERTER TOPOLOGY FOR HIGH POWER AND HIGH PRECISION FAST PULSED CURRENT SOURCES By Jean-Marc CRAVERO, Carlos DE ALMEIDA MARTINS, Rogelio Adrian GARCIA RETEGUI, Nicolas WASSINGER, Mario BENEDETTI	[View] [Download]
Abstract: A new high current, low rise time and high precision pulse generator is presented. The topology is based on the use of different stages, each one specific for a particular operation range in terms of power and switching frequency. The design and operating principle of the proposed topology are described. Finally, the results obtained from an implemented reduced scale prototype are compared with the simulation ones in order to validate the design.

	Electronic high-voltage pulse current generator for shock wave therapy in human medicine By MANFRED GEKELER	[View] [Download]
Abstract: Extracorporeal Shock Wave Therapy (ESWT) is a non-invasive method for treating various ailments in the fields of urology, dermatology and orthopedics. The electro-hydraulic method is especially suitable for creating the shock wave. In a therapy head outside the human body, powerful electrical sparks are triggered. A novel electronic circuit was developed to generate the high voltages (up to 25 kV) and currents (up to 10 kA) required for this purpose. Inexpensive low-voltage standard components are exclusively employed, extending the service life of the electrodes, increasing the energy efficiency and lowering the cost of the therapeutic apparatus.

	Extension of the Operational Range of High Performance Line-Commutated Converters into Discontinuous Current Mode By Sebastian MAESTRI, Roberto PETROCELLI, Gustavo UICICH, Mario BENEDETTI, Rogelio GARCIA RETEGUI	[View] [Download]
Abstract: A digital implementation of a method for controlling line-commutated converters in discontinuous current is presented. The proposed strategy is based on the modification of the firing angle by means of an on-line estimation of the rectifier average current. Simulations and experimental results on a current control system are presented.

	Klystron Modulator for the XFEL RF Station By Renso WOLF, Stefan BRUINS, Werner HEYNS, Martien ROIJMANS	[View] [Download]
Abstract: For the European XFEL at DESY in Hamburg (Germany) a Klystron Modulator prototype is built, based on the proven so called â€œBouncerâ€ principle. Although it is a well known technique, the Bouncer Modulator faces some difficulties on flattop stability and protection of the Klystron. In this paper improvements for these problems are presented. Besides a chosen solution for constant input power consumption related to the pulsed output power is discussed.

	NEW MODULATOR FOR MULTI-PHASE INTERLEAVED DC/DC CONVERTERS By Rogelio Adrian GARCIA RETEGUI, Mario BENEDETTI, Roberto PETROCELLI, nicolÃ¡s WASSINGER, SebastiÃ¡n MAESTRI	[View] [Download]
Abstract: This work introduces a new modulator for multi-phase interleaved converters, capable of tolerating abrupt changes both in the differential input-output voltage and the reference; while it reduces the interleaved adjustment time and the error during the transient. The proposed method can be applicable to high power systems.

	POWERING AND CONTROL STRATEGY FOR THE MAIN QUADRUPOLE MAGNETS OF THE LHC INNER TRIPLET SYSTEM By HUGUES THIESEN, FREDERICK BORDRY, JEFF THOMSEN, DAVID NISBET	[View] [Download]
Abstract: The LHC particle accelerator uses a string of superconducting quadrupole magnets called the Inner Triplet to focus the beams before collision. This paper describes the powering of the magnets using nested circuits, and their control by decoupling of the currents using state feedback loops, and presents commissioning results.

	Resonant converters for pulsed electrochemical applications By Kathryn KLEMENT, Francis DAWSON, Steven THORPE	[View] [Download]
Abstract: Resonant converters offer an efficient alternative to linear supplies for pulsed electrochemical processes. This paper presents an open loop and closed loop comparison between the dc-dc series and series-parallel resonant converters for a pulsed 500W load. Placing restrictions on the resonant tank parameters proves necessary to achieve continuous transient waveforms. Generalized averaging is applied to each converter with frequency control and the small signal models are compared. The closed loop system proves to be robust using a single mode proportional integral controller. The series-parallel resonant converter is shown to be favourable for this application due to its simpler output stage and a detailed design is presented.

	Resonant inverter with output voltage pulse-phase-shift control for DBD plasma reactor supply By Marcin HOLUB, StanisÃ 142aw KALISIAK, Tomasz JAKUBOWSKI	[View] [Download]
Abstract: Non-thermal plasma technology systems often require high voltage, AC power supplies. Paper discusses a novel power electronic converter topology enabling high voltage, high frequency operation with resonant, quasi-phase-mode output voltage control. System topology, simulation results and experimental properties are presented and discussed.

	The High Voltage Power Supply System for the European 2MW Electron Cyclotron Test Facility By Tullio BONICELLI, F. ALBAJAR, D. FASEL, L. RINALDI, U. SIRAVO, L. SITA, G. TADDIA	[View] [Download]
Abstract: A new power supply, PS, system has been recently installed at the European Electron Cyclotron Test Facility at CRPP, in Lausanne, Switzerland. The PS system is composed of two power converters, the Main High Voltage Power Supply (MHVPS) and the Body Power Supply (BPS), whose combined operation provides the required voltage and current, up to 100 kV and 80 A, for the operation of a high power, 2 MW, gyrotron presently under development in Europe for the ITER project. The specifications impose high accuracy on the voltage and very demanding dynamic performance from the PS system. In addition, the protection of the gyrotron, which may be subjected to internal arcs during conditioning, requires a very fast switch off and a tight limitation of the total electrical charge delivered from the converters. The MHVPS and the BPS have been subjected to extensive tests both at factory, before delivery, and on-site, after installation. All tests, performed on full power dummy loads, were passed successfully. Operation on the gyrotron will start in 2010.

	Toward the Implementation of Booster Dipole magnet power supply to 3GeV Synchrotron light source By Udaya BHASKER MANTHATI, Oriol GOMIS-BELLMUNT, MÂ¡quel TEIXIDÃ“-CASAS, joan BERGAS-JANÃ‰, antoni SUDRIA-ANDREU	[View] [Download]
Abstract: This paper presents a simulation work and control aspects of a Booster Dipole magnet power supply to a light source. Description of structure, operation of the structure and synchronous rectification Buck converter are discussed. Voltage and Current mode controllers for one-quadrant and two-quadrant converters are proposed. Better performance results with Split-Range technique are obtained. The converters are controlled by using pulse width modulation techniques.

	Voltage enhancement of the dc power supplies for dynamic current control of large scale superconducting coils for fusion plasma experimental device LHD By Hirotaka CHIKARAISHI, Tomoyuki INOUE, Shigeyuki TAKAMI, Kouji AOYAMA, Tomoyuki HAGA	[View] [Download]
Abstract: The LHD is a helical-type fusion plasma device using six superconducting coils to form a magnetic field. The fundamental operation of the LHD is performed under a dc magnetic field, and a power system which was suitable for steady state excitation was designed and constructed. With the progress in the fusion plasma research, more dynamic experiments are planned, and require dynamic control of magnetic field. For this purpose, the output voltages of power supplies were enhanced using additional pulse power supplies.