EPE Association: EPE 2005 - Topic 17-2: Power electronics systems for industry and physics research

EPE 2005 - Topic 17-2: Power electronics systems for industry and physics research
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 17: ENERGY EFFICIENT POWER ELECTRONICS SYSTEMS AND DRIVES IN THE INDUSTRY AND PHYSICS RESEARCH > EPE 2005 - Topic 17-2: Power electronics systems for industry and physics research

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   4-13kA DC Current Transducers Enabling Accurate In-Situ Calibration for a New Particle Accelerator Project, LHC
By BOUWKNEGT Koos; HUDSON Gregory [View]
[Download]

Abstract: CERN’s next generation particle accelerator, the Large Hadron Collider (LHC) requires accurate current measurement up to 13kA to enable current tracking between individual power converters. DC Current Transducers (DCCTs) have been developed to allow in-situ calibrations to 10‾6 uncertainty. This paper describes the principle, design and initial evaluations.

   A 250W HIGH PRESSURE SODIUM LAMP HIGH POWER FACTOR ELECTRONIC BALLAST USING AN AC CHOPPER
By SINCERO Geraldo; FRANCIOSI Andre; PERIN Arnaldo [View]
[Download]

Abstract: A novel high pressure sodium lamp (HPS) electronic ballast topology with high power factor (HPF) is presented. Instead of using a power factor correction (PFC) stage, an ac chopper is capable of achieving a HPF and of supplying high frequency current to the lamp. Due to its output characteristic the lamp current presents a low frequency modulation at the voltage source frequency and the consequences of this operation are discussed. Afterwards, different converter topologies, bi-directional switches and modulation strategies for the ac-ac converter are presented. Finally, experimental results of a prototype for 250W HPS lamps are discussed.

   A high frequency resonant power converter for high power RF applications
By ZANCHETTA Pericle; WHEELER Pat; CLARE Jon; PRYZBYLA Jan; BLAND Michael [View]
[Download]

Abstract: This paper considers the design of a "long-pulse" modulator supply rated at 25kV, 10A (250kW peak power, duty ratio 10\%, 25kW average power, pulse length ~ 1 - 2ms). The supply is based on direct modulation of a multi-phase resonant power supply, fed by an active rectifier. The objectives of the development are to produce a compact power supply, with low stored energy and with high power quality at the utility supply. The paper provides a brief overview of the technology, followed by a discussion of the design choices.

   Analysis Of A Series Inverter
By HINOW Georg; HINOV Christo [View]
[Download]

Abstract: The series inverter is a source of high-frequency energy and a fundamental object of research in power electronics. The four circuit parameters are replaced by only two inverter coordinates: attenuation and phase, which corresponds to the rank of the differential equation, and canonizes the vision about the processes in the inverter. The differential relation between the capacitor voltage and the current is presented by means of a complex function, which represents the energy in theinverter. An inverter function has been synthesized, presenting the electromagnetic processes over the entire operation period. The inverter function has been adapted to the conditions of the stationary mode, through which it is formulated. The functional results have been modeled in the phase space. The phase model makes it possible to formulate the balance between the mode reduction, due to the attenuation and its commutation compensation.A mode-energy map has been synthesized, comprising the voltage, current and energy of the inverter in stationary mode, which are functions of the inverter coordinates. The map presents the inverter load and frequency characteristics.The conventional solution of the differential equations has been replaced by the energy connection of the phase model. A unique formula for the inverter power has been proved, whereby it is not dependent on current. An alternative method for calculating the inverter has been established.

   Case Study of A Highly-Reliable Dimmable Road Lighting System with Intelligent Remote Control
By MAI Wei Zhong; HUI Shu Yuen Ron; HO Ngai Man; CHUNG Henry S.H. [View]
[Download]

Abstract: This paper presents the phase-one results of a case study of a dimmable road lighting system with intelligent remote control. This is the first large-scale installation of such system for about 8000 street lamps in China and the phase-one of the project involves 1350 lamps. Patent-pending central control dimming systems, that can turn existing “non-dimmable” electromagnetic lighting systems into dimmable ones without major rewiring or replacement of equipment, have been installed in Heshan City, China since September 2004. This central dimming system provides a self-recovery feature and ensures high lighting system availability, as it will automatically withdraw itself from the lighting network if it cannot work normally. By retaining existing electromagnetic ballasts in all lamp posts, the use of this central dimming system does not require any expensive electronic ballasts. More importantly, electronic ballasts may help save some energy for a few years of their short lifetime but will become electronic waste and pollutants for many hundreds of years. The proposed system in this paper provides an environmentally-friendly and energy-saving solution for dimmable road lighting systems. Most of the advantages of electromagnetic ballasts such as long lifetime, recyclability of iron chokes, high reliability and immunity against extreme weather conditions and lightning are kept. During the 9-month operation, none of the streets with such dimming system installed suffers light blackout. It has also been independently confirmed that there was no increase in crime and traffic accident rates. No compliant has been received from residents by the road lighting management company. In phase-one of this project, an overall energy saving of 27\% has been recorded without adversely affecting quality of life.

   Current Limiter Device for Railway and Distribution network Design and tests on railway conditions : 1000A - 25kV - 50Hz
By KLAJA Dominique; JONCQUEL Eric; COQUERY GeRard; LALLEMAND Richard; HERRMANN Francis; CARON Herve; JOSSE Gerard [View]
[Download]

Abstract: A current limiter device is designed and tested for the railway electrical network 25kV-50Hz, and the grid network 20kV-50Hz. It is based on static switches issued from the latest light triggered thyristor technology which are triggered to assume a by-pass on an inductive impedance in the normal status, and are switched off when a fault current is detected. This device allows to reduce the short circuitcurrent fault in the line and the switchgear after the delay of the first half wave period. The design is focused on different technical points: high reliability level using light triggered thyristors, critical switch off conditions for the highest short circuit current, air cooled heat pipe systems, low conduction losses, simple assembly. The test results are discussed for the full voltage and short circuit current.

   Gyrotron Body Power Supply Preliminary Test Results
By SANTINELLI Maurizio [View]
[Download]

Abstract: A 170 GHz, 2 MW, steady state gyrotron is being developed in a collaboration between European research associations and industries to be used for the Electron Cyclotron Resonance Heating (ECRH) system of ITER, the next step in nuclear fusion research. The gyrotron is presently in the prototype state.For the test facility dedicated to the testing of this gyrotron, new power supplies need to be procured. A feasibility study was performed aimed at using new designs based on present day techniques and at performing and constructing a prototype for further testing and evaluation. The prototype BPS (Body Power Supply) which is connected to the body of the gyrotron is now in an advanced stage of construction and the first test results are in close agreement with the design objectives of the feasibility study.

   High Voltage Igniter Based on Discontinuous Working Mode of Piezoelectric Transformers
By DO Cuong Manh [View]
[Download]

Abstract: Abstract – With a lot of advantages, Piezoelectric Transformer (PT) has become an ideal device in some technical applications. This paper introduces and implements a control circuit that drives a PT in discontinuous working mode. In this working mode, a PT can be overloaded up to a certain level in a specific of time that all its characteristics are still remained. The results shown here may be useful solutions for technical applications which require a high power for a finite time, and an igniter for high intensity discharge (HID) lamps is an example.

   Hot-melt Adhesive Method using Metal Foil Induction Heatingand Performance of Long E-Type Core Head
By TOMITA Hideo; OBATA Shuji; SEKINE Takamitsu [View]
[Download]

Abstract: A safe Induction Heating Adhesion (IHA) method for constructing furniture, houses, etc. is devised using a recyclable manufacturing system composed of hot-melt glue on metal foils, core heads and a 20 kHz inverter. A new type core heads are developed for performing the thick board adhesion. These processes are analyzed with a finite element method. Shield effects in the E-type core head are investigated for producing the power up head. It is concluded that this shield E-type core head has the highest performance in all of core heads now.

   HV Driver for Ion Thrusters
By BELLONI Federico; GROSSI Roberto; MARANESI Piero; RIVA Marco [View]
[Download]

Abstract: A high voltage drive for radiofrequency ion thrusters is proposed.The load, consisting of a heavy ion plasma, imposes severe dynamic requirements to the power converters. State space models in the discrete time are derived for the power cells of both the high voltage generators constituting the driving system.The frequency responses of the control-to-output transfer functions are reported and the occurrence of short circuits is faced.

   Induction Heating Using Traveling Magnetic Field and Three-Phase High-Frequency Inverter
By TOMITA Hideo; OBATA Shuji; SEKINE Takamitsu [View]
[Download]

Abstract: An effective dismantlable adhesion method is proposed for an interior material construction and mechanical assembling process for industry, etc. The method is applied an induction heating and thermoplastic adhesive. This paper is described on the new induction heating device using traveling magnetic field with the three-phase linear coil and high-frequency inverter for bonding of a long straight material. From the analysis and experiment, it is shown that the short-pitch winding coil is effective for uniform heating on a straight metal. The device with this coil is applicable to adhesion and dismantling of a long steel stud and wall material for interior construction, for example.

   Overview of Low Cost Converters for Single-phase Switched Reluctance Motors
By PICKERT Volker; SLATER Howard; AYOB Afida [View]
[Download]

Abstract: Many different topologies for single-phase switched reluctance motors have been published, giving an impression of large numbers of unconnected techniques. To provide insight into this area, an overview of converter topologies is presented. Each is classified and a family tree of converters is derived. Selected converters are analysed and compared.

   Scalable fluorescent lamp driver using magnetic amplifiers
By BOEKE Ulrich [View]
[Download]

Abstract: A linear variable inductor is proposed as means to control the operation of a fluorescent discharge lamp in a load resonant circuit. Thus, multiple lamps can be operated with independent control supplied from a single DC/AC voltage inverter that operates with a constant switching frequency in e.g. backlights of LCD-TVs.

EPE 2005 - Topic 17-2: Power electronics systems for industry and physics research
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 17: ENERGY EFFICIENT POWER ELECTRONICS SYSTEMS AND DRIVES IN THE INDUSTRY AND PHYSICS RESEARCH > EPE 2005 - Topic 17-2: Power electronics systems for industry and physics research
	[return to parent folder]

	4-13kA DC Current Transducers Enabling Accurate In-Situ Calibration for a New Particle Accelerator Project, LHC By BOUWKNEGT Koos; HUDSON Gregory	[View] [Download]
Abstract: CERN’s next generation particle accelerator, the Large Hadron Collider (LHC) requires accurate current measurement up to 13kA to enable current tracking between individual power converters. DC Current Transducers (DCCTs) have been developed to allow in-situ calibrations to 10‾6 uncertainty. This paper describes the principle, design and initial evaluations.

	A 250W HIGH PRESSURE SODIUM LAMP HIGH POWER FACTOR ELECTRONIC BALLAST USING AN AC CHOPPER By SINCERO Geraldo; FRANCIOSI Andre; PERIN Arnaldo	[View] [Download]
Abstract: A novel high pressure sodium lamp (HPS) electronic ballast topology with high power factor (HPF) is presented. Instead of using a power factor correction (PFC) stage, an ac chopper is capable of achieving a HPF and of supplying high frequency current to the lamp. Due to its output characteristic the lamp current presents a low frequency modulation at the voltage source frequency and the consequences of this operation are discussed. Afterwards, different converter topologies, bi-directional switches and modulation strategies for the ac-ac converter are presented. Finally, experimental results of a prototype for 250W HPS lamps are discussed.

	A high frequency resonant power converter for high power RF applications By ZANCHETTA Pericle; WHEELER Pat; CLARE Jon; PRYZBYLA Jan; BLAND Michael	[View] [Download]
Abstract: This paper considers the design of a "long-pulse" modulator supply rated at 25kV, 10A (250kW peak power, duty ratio 10\%, 25kW average power, pulse length ~ 1 - 2ms). The supply is based on direct modulation of a multi-phase resonant power supply, fed by an active rectifier. The objectives of the development are to produce a compact power supply, with low stored energy and with high power quality at the utility supply. The paper provides a brief overview of the technology, followed by a discussion of the design choices.

	Analysis Of A Series Inverter By HINOW Georg; HINOV Christo	[View] [Download]
Abstract: The series inverter is a source of high-frequency energy and a fundamental object of research in power electronics. The four circuit parameters are replaced by only two inverter coordinates: attenuation and phase, which corresponds to the rank of the differential equation, and canonizes the vision about the processes in the inverter. The differential relation between the capacitor voltage and the current is presented by means of a complex function, which represents the energy in theinverter. An inverter function has been synthesized, presenting the electromagnetic processes over the entire operation period. The inverter function has been adapted to the conditions of the stationary mode, through which it is formulated. The functional results have been modeled in the phase space. The phase model makes it possible to formulate the balance between the mode reduction, due to the attenuation and its commutation compensation.A mode-energy map has been synthesized, comprising the voltage, current and energy of the inverter in stationary mode, which are functions of the inverter coordinates. The map presents the inverter load and frequency characteristics.The conventional solution of the differential equations has been replaced by the energy connection of the phase model. A unique formula for the inverter power has been proved, whereby it is not dependent on current. An alternative method for calculating the inverter has been established.

	Case Study of A Highly-Reliable Dimmable Road Lighting System with Intelligent Remote Control By MAI Wei Zhong; HUI Shu Yuen Ron; HO Ngai Man; CHUNG Henry S.H.	[View] [Download]
Abstract: This paper presents the phase-one results of a case study of a dimmable road lighting system with intelligent remote control. This is the first large-scale installation of such system for about 8000 street lamps in China and the phase-one of the project involves 1350 lamps. Patent-pending central control dimming systems, that can turn existing “non-dimmable” electromagnetic lighting systems into dimmable ones without major rewiring or replacement of equipment, have been installed in Heshan City, China since September 2004. This central dimming system provides a self-recovery feature and ensures high lighting system availability, as it will automatically withdraw itself from the lighting network if it cannot work normally. By retaining existing electromagnetic ballasts in all lamp posts, the use of this central dimming system does not require any expensive electronic ballasts. More importantly, electronic ballasts may help save some energy for a few years of their short lifetime but will become electronic waste and pollutants for many hundreds of years. The proposed system in this paper provides an environmentally-friendly and energy-saving solution for dimmable road lighting systems. Most of the advantages of electromagnetic ballasts such as long lifetime, recyclability of iron chokes, high reliability and immunity against extreme weather conditions and lightning are kept. During the 9-month operation, none of the streets with such dimming system installed suffers light blackout. It has also been independently confirmed that there was no increase in crime and traffic accident rates. No compliant has been received from residents by the road lighting management company. In phase-one of this project, an overall energy saving of 27\% has been recorded without adversely affecting quality of life.

	Current Limiter Device for Railway and Distribution network Design and tests on railway conditions : 1000A - 25kV - 50Hz By KLAJA Dominique; JONCQUEL Eric; COQUERY GeRard; LALLEMAND Richard; HERRMANN Francis; CARON Herve; JOSSE Gerard	[View] [Download]
Abstract: A current limiter device is designed and tested for the railway electrical network 25kV-50Hz, and the grid network 20kV-50Hz. It is based on static switches issued from the latest light triggered thyristor technology which are triggered to assume a by-pass on an inductive impedance in the normal status, and are switched off when a fault current is detected. This device allows to reduce the short circuitcurrent fault in the line and the switchgear after the delay of the first half wave period. The design is focused on different technical points: high reliability level using light triggered thyristors, critical switch off conditions for the highest short circuit current, air cooled heat pipe systems, low conduction losses, simple assembly. The test results are discussed for the full voltage and short circuit current.

	Gyrotron Body Power Supply Preliminary Test Results By SANTINELLI Maurizio	[View] [Download]
Abstract: A 170 GHz, 2 MW, steady state gyrotron is being developed in a collaboration between European research associations and industries to be used for the Electron Cyclotron Resonance Heating (ECRH) system of ITER, the next step in nuclear fusion research. The gyrotron is presently in the prototype state.For the test facility dedicated to the testing of this gyrotron, new power supplies need to be procured. A feasibility study was performed aimed at using new designs based on present day techniques and at performing and constructing a prototype for further testing and evaluation. The prototype BPS (Body Power Supply) which is connected to the body of the gyrotron is now in an advanced stage of construction and the first test results are in close agreement with the design objectives of the feasibility study.

	High Voltage Igniter Based on Discontinuous Working Mode of Piezoelectric Transformers By DO Cuong Manh	[View] [Download]
Abstract: Abstract – With a lot of advantages, Piezoelectric Transformer (PT) has become an ideal device in some technical applications. This paper introduces and implements a control circuit that drives a PT in discontinuous working mode. In this working mode, a PT can be overloaded up to a certain level in a specific of time that all its characteristics are still remained. The results shown here may be useful solutions for technical applications which require a high power for a finite time, and an igniter for high intensity discharge (HID) lamps is an example.

	Hot-melt Adhesive Method using Metal Foil Induction Heatingand Performance of Long E-Type Core Head By TOMITA Hideo; OBATA Shuji; SEKINE Takamitsu	[View] [Download]
Abstract: A safe Induction Heating Adhesion (IHA) method for constructing furniture, houses, etc. is devised using a recyclable manufacturing system composed of hot-melt glue on metal foils, core heads and a 20 kHz inverter. A new type core heads are developed for performing the thick board adhesion. These processes are analyzed with a finite element method. Shield effects in the E-type core head are investigated for producing the power up head. It is concluded that this shield E-type core head has the highest performance in all of core heads now.

	HV Driver for Ion Thrusters By BELLONI Federico; GROSSI Roberto; MARANESI Piero; RIVA Marco	[View] [Download]
Abstract: A high voltage drive for radiofrequency ion thrusters is proposed.The load, consisting of a heavy ion plasma, imposes severe dynamic requirements to the power converters. State space models in the discrete time are derived for the power cells of both the high voltage generators constituting the driving system.The frequency responses of the control-to-output transfer functions are reported and the occurrence of short circuits is faced.

	Induction Heating Using Traveling Magnetic Field and Three-Phase High-Frequency Inverter By TOMITA Hideo; OBATA Shuji; SEKINE Takamitsu	[View] [Download]
Abstract: An effective dismantlable adhesion method is proposed for an interior material construction and mechanical assembling process for industry, etc. The method is applied an induction heating and thermoplastic adhesive. This paper is described on the new induction heating device using traveling magnetic field with the three-phase linear coil and high-frequency inverter for bonding of a long straight material. From the analysis and experiment, it is shown that the short-pitch winding coil is effective for uniform heating on a straight metal. The device with this coil is applicable to adhesion and dismantling of a long steel stud and wall material for interior construction, for example.

	Overview of Low Cost Converters for Single-phase Switched Reluctance Motors By PICKERT Volker; SLATER Howard; AYOB Afida	[View] [Download]
Abstract: Many different topologies for single-phase switched reluctance motors have been published, giving an impression of large numbers of unconnected techniques. To provide insight into this area, an overview of converter topologies is presented. Each is classified and a family tree of converters is derived. Selected converters are analysed and compared.

	Scalable fluorescent lamp driver using magnetic amplifiers By BOEKE Ulrich	[View] [Download]
Abstract: A linear variable inductor is proposed as means to control the operation of a fluorescent discharge lamp in a load resonant circuit. Thus, multiple lamps can be operated with independent control supplied from a single DC/AC voltage inverter that operates with a constant switching frequency in e.g. backlights of LCD-TVs.