EPE Association: EPE 2007 - Subtopic 20-2 - DS: Energy conversion and conditioning technologies in physics research and related applications

EPE 2007 - Subtopic 20-2 - DS: Energy conversion and conditioning technologies in physics research and related applications
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 20: 'Energy conversion and conditioning technologies in physics research and related applications' > EPE 2007 - Subtopic 20-2 - DS: Energy conversion and conditioning technologies in physics research and related applications

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   A 4-quadrant 300kW-peak high precision and bandwidth switch mode power converter for particle accelerator magnets supply
By BEURET AndrÃ©; BORDRY Frederick; BURNET Jean-Paul; MARTINS Carlos [View]
[Download]

Abstract: A switch mode AC/DC-DC power conversion topology is proposed for the supply of particle accelerator correction magnets, requiring simultaneously high peak power (300kW), high bandwidths (1kHz in voltage, 300Hz in current), high current precision (10-4), EMC emissions according to international standards and current/voltage reversibility (4-quadrants operation). The power part dimensioning key issues are presented, including semiconductor power cycling design, high frequency power filtering, DC-link bus stability analysis. The feedback controls strategy and suited PWM techniques are reported. Experimental results are presented and commented.

   A High Voltage Pulsed Power Supply with Magnetic Switch for ESP
By WUHUA Li; JIANDE Wu; XIE Rui; XIANGNING He [View]
[Download]

Abstract: This paper describes a developed repetitive high-voltage pulsed power supply. To satisfy the stringent requirements, such as the sharp rise-time, high output voltage, and low switching losses, the proposed generator is designed with an LCC resonance circuit with the multiple-voltage rectifying circuit and the magnetic switch circuit. The switches of the proposed converter have ZCS performances to reduce both the switching losses and the switch voltage stress. A pulsed power supply with the magnetic switch is proposed in this paper to compress the voltage and current waveforms with sharp and narrow performances to satisfy the requirements of the electrostatic precipitator (ESP). The experimental results of a pulsed power rated at 4kV, operating at 10kHz is implemented and tested to verify the effectiveness of the proposed converter.

   A study on the Reactor Parameter of Atmosphere Plasma Power Supply
By LEE Woo-Cheol; LEE Yong Duk; LEE Taeck-Ki [View]
[Download]

Abstract: In this article, we suggest an extraction method for reactor parameters in atmosphere plasma power supplies. The reactance was extracted from reactive power by detecting phase difference between inverter voltage and current. The validity of the proposed scheme is investigated through simulation results and experimental results.

   DESIGN OF THE DC AND AC MAGNET POWER SUPPLIES FOR THE SOLEIL SYNCHROTRON RADIATION SOURCE
By BOUVET Francois [View]
[Download]

Abstract: This paper describes the power supplies designed for the electromagnet system of the SOLEIL third generation light source. This new source demands a very high level of performance from the power converters, notably in terms of current precision and stability. The means to reach such performances - mainly based on precise measurements and digital control with high resolution PWM - are detailed. As synchronized control of the different equipment is a major requirement, the high level control system of the power supplies using the Profibus-DP fieldbus is also presented.

   Development of IGCT module and blip resistor for KSTAR
By CHOI Changho; CHO Moohyun; SONG Inho [View]
[Download]

Abstract: The abstract is not available.

   Digital Power Supply Controller for control of extremely precise power supplies
By HU Wei; LONG Fengli; GROEN Ronnie; BRUINS Stefan; WOLF Renso [View]
[Download]

Abstract: For control of extremely precise power supplies, a Digital Power Supply Controller (DPSC) is developed, based on the application of a Field Programmable Gate Array (FPGA). The complete DPSC is programmed as a single IP-core co-processor and runs independently from a supervisory NIOS II soft-core processor in the FPGA.

   Digital-closed loop high-speed thyristor firing system for line-commutated converters
By MAESTRI Sebastian; BENEDETTI Mario; FUNES Marcos; UICICH Gustavo [View]
[Download]

Abstract: In this manuscript, a novel all-digital high-speed closed-loop thyristor firing system is presented. Different aspects associated to digital implementations, like sampling frequency, synchronism and finite word-length are analyzed. Experimental results obtained on a test supply are discussed.

   Full solid-state pulsed power supplies for injection/extraction at SOLEIL
By LEBASQUE Pierre; LAVIEVILLE Jean-Paul [View]
[Download]

Abstract: SOLEIL is a 2.75 GeV third generation synchrotron radiation facility near Paris. To transfer the beam from one accelerator to the next, fast switching magnetic devices are required, with pulse durations ranging from sec up to 24 msec. It was decided not to use thyratron switches, even for HV systems, and to build all power supplies of these systems by using silicon switches. We present in this paper the design and realisation of these pulsed equipment, based on the association of standard DC power supplies with a pulser, which enables to avoid pulsed current amplitude regulation. We will also give some elements on the magnets realisation, as the magnetic performances of the magnets load were controlled with a specific strategy.

   High current capacitor discharge power converters for the magnetic lenses of a neutrino beam facility
By CRAVERO Jean-Marc; MAIRE Gilles; ROYER Jean-Pierre [View]
[Download]

Abstract: In the framework of a new neutrino beam facility, two magnetic lenses are installed to focus the beam particles. These magnetic elements are powered by capacitor discharge power converters that generate high current pulses whose nominal amplitude can reach 180 kA with double pulse mode ability. This paper describes the design, assembly, testing and commissioning of these power converters.

   Investigation on power supply operation for the Helias Stellarator Fusion Reactor
By MÃœHLBACHER Jan; HALLER Rainer; WOBIG Horst; BUCHNER Christian; WIECZOREK Andreas; HARMEYER Ewald [View]
[Download]

Abstract: Investigations on operation of the power supply for the auxiliary system of the fusion power plant were made using the SIMPLORER, EFFI and NEPLAN codes. The new approach was to use an additional 80MW, 1.2GJ energy storage unit with the magnetic confinement system (superconducting magnet system, multiconverter unit and STATCOM) as a SMES to reduce network loadings to 80MW instead of 160MW in the power plant start-up operation during plasma heating. This reduction of the active power pulsed loads reduces the risk of oscillating power frequency changes. These oscillations produce transient power flows which can danger the grid stability.

   Magnet Power Converters for the New Booster of Elettra
By MOLARO Denis; KORHONEN Petri; TIIHONEN Tommi; VISINTINI Roberto [View]
[Download]

Abstract: A new Full-Energy Injector for the Storage Ring of the Elettra Synchrotron Light Laboratory is under construction. High precision and reproducibility power converters will be used to supply its magnets. The excitation current waveform is a DC biased sine wave at ~3 Hz that all booster power converter have to follow synchronously. Key features are modular design comprising N 1 redundancy and energy recovery capabilities. A fully digital control has been adopted for the regulation and the PWM generation for the IGBTs. At the time of the presentation of this article, the power converters are in the final factory test phase and therefore only preliminary results on dummy loads will be reported.

   Phase-controlled line-commutated converter control in discontinuous conduction mode
By PETROCELLI Roberto; UICICH Gustavo; MAESTRI Sebastian; BENEDETTI Mario [View]
[Download]

Abstract: A method for controlling line-commutated converters in discontinuous conduction mode is presented. The proposed strategy is based on the modification of the firing angle in order to produce the same effects on the average output current regardless the conduction mode. The compensation is based in an on-line estimation of the rectifier average output current in order to achieve the compensation angle. Simulations on a high-precision current control system are presented.

   The BTF (Beam Transfer Facility) DC/Pulsed 50 kW power converter for DAFNE injector
By MACCAFERRI Remo; CHIUSANO Frederico [View]
[Download]

Abstract: This power converter energize a deflection magnet (L= 10.8 mH , R=43 mΩ). It can ramp up and down in less than 10 ms, regulate a 450 A current flat top from 5 to 960 ms with a precision better than 10-3, works in both polarities and finally can also operate as a conventional DC current generator. With respect to others similar converters (i.e. Ref [4]), its versatility and internal power consumption has been optimized without increasing too much its complexity.

EPE 2007 - Subtopic 20-2 - DS: Energy conversion and conditioning technologies in physics research and related applications
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 20: 'Energy conversion and conditioning technologies in physics research and related applications' > EPE 2007 - Subtopic 20-2 - DS: Energy conversion and conditioning technologies in physics research and related applications
	[return to parent folder]

	A 4-quadrant 300kW-peak high precision and bandwidth switch mode power converter for particle accelerator magnets supply By BEURET AndrÃ©; BORDRY Frederick; BURNET Jean-Paul; MARTINS Carlos	[View] [Download]
Abstract: A switch mode AC/DC-DC power conversion topology is proposed for the supply of particle accelerator correction magnets, requiring simultaneously high peak power (300kW), high bandwidths (1kHz in voltage, 300Hz in current), high current precision (10-4), EMC emissions according to international standards and current/voltage reversibility (4-quadrants operation). The power part dimensioning key issues are presented, including semiconductor power cycling design, high frequency power filtering, DC-link bus stability analysis. The feedback controls strategy and suited PWM techniques are reported. Experimental results are presented and commented.

	A High Voltage Pulsed Power Supply with Magnetic Switch for ESP By WUHUA Li; JIANDE Wu; XIE Rui; XIANGNING He	[View] [Download]
Abstract: This paper describes a developed repetitive high-voltage pulsed power supply. To satisfy the stringent requirements, such as the sharp rise-time, high output voltage, and low switching losses, the proposed generator is designed with an LCC resonance circuit with the multiple-voltage rectifying circuit and the magnetic switch circuit. The switches of the proposed converter have ZCS performances to reduce both the switching losses and the switch voltage stress. A pulsed power supply with the magnetic switch is proposed in this paper to compress the voltage and current waveforms with sharp and narrow performances to satisfy the requirements of the electrostatic precipitator (ESP). The experimental results of a pulsed power rated at 4kV, operating at 10kHz is implemented and tested to verify the effectiveness of the proposed converter.

	A study on the Reactor Parameter of Atmosphere Plasma Power Supply By LEE Woo-Cheol; LEE Yong Duk; LEE Taeck-Ki	[View] [Download]
Abstract: In this article, we suggest an extraction method for reactor parameters in atmosphere plasma power supplies. The reactance was extracted from reactive power by detecting phase difference between inverter voltage and current. The validity of the proposed scheme is investigated through simulation results and experimental results.

	DESIGN OF THE DC AND AC MAGNET POWER SUPPLIES FOR THE SOLEIL SYNCHROTRON RADIATION SOURCE By BOUVET Francois	[View] [Download]
Abstract: This paper describes the power supplies designed for the electromagnet system of the SOLEIL third generation light source. This new source demands a very high level of performance from the power converters, notably in terms of current precision and stability. The means to reach such performances - mainly based on precise measurements and digital control with high resolution PWM - are detailed. As synchronized control of the different equipment is a major requirement, the high level control system of the power supplies using the Profibus-DP fieldbus is also presented.

	Development of IGCT module and blip resistor for KSTAR By CHOI Changho; CHO Moohyun; SONG Inho	[View] [Download]
Abstract: The abstract is not available.

	Digital Power Supply Controller for control of extremely precise power supplies By HU Wei; LONG Fengli; GROEN Ronnie; BRUINS Stefan; WOLF Renso	[View] [Download]
Abstract: For control of extremely precise power supplies, a Digital Power Supply Controller (DPSC) is developed, based on the application of a Field Programmable Gate Array (FPGA). The complete DPSC is programmed as a single IP-core co-processor and runs independently from a supervisory NIOS II soft-core processor in the FPGA.

	Digital-closed loop high-speed thyristor firing system for line-commutated converters By MAESTRI Sebastian; BENEDETTI Mario; FUNES Marcos; UICICH Gustavo	[View] [Download]
Abstract: In this manuscript, a novel all-digital high-speed closed-loop thyristor firing system is presented. Different aspects associated to digital implementations, like sampling frequency, synchronism and finite word-length are analyzed. Experimental results obtained on a test supply are discussed.

	Full solid-state pulsed power supplies for injection/extraction at SOLEIL By LEBASQUE Pierre; LAVIEVILLE Jean-Paul	[View] [Download]
Abstract: SOLEIL is a 2.75 GeV third generation synchrotron radiation facility near Paris. To transfer the beam from one accelerator to the next, fast switching magnetic devices are required, with pulse durations ranging from sec up to 24 msec. It was decided not to use thyratron switches, even for HV systems, and to build all power supplies of these systems by using silicon switches. We present in this paper the design and realisation of these pulsed equipment, based on the association of standard DC power supplies with a pulser, which enables to avoid pulsed current amplitude regulation. We will also give some elements on the magnets realisation, as the magnetic performances of the magnets load were controlled with a specific strategy.

	High current capacitor discharge power converters for the magnetic lenses of a neutrino beam facility By CRAVERO Jean-Marc; MAIRE Gilles; ROYER Jean-Pierre	[View] [Download]
Abstract: In the framework of a new neutrino beam facility, two magnetic lenses are installed to focus the beam particles. These magnetic elements are powered by capacitor discharge power converters that generate high current pulses whose nominal amplitude can reach 180 kA with double pulse mode ability. This paper describes the design, assembly, testing and commissioning of these power converters.

	Investigation on power supply operation for the Helias Stellarator Fusion Reactor By MÃœHLBACHER Jan; HALLER Rainer; WOBIG Horst; BUCHNER Christian; WIECZOREK Andreas; HARMEYER Ewald	[View] [Download]
Abstract: Investigations on operation of the power supply for the auxiliary system of the fusion power plant were made using the SIMPLORER, EFFI and NEPLAN codes. The new approach was to use an additional 80MW, 1.2GJ energy storage unit with the magnetic confinement system (superconducting magnet system, multiconverter unit and STATCOM) as a SMES to reduce network loadings to 80MW instead of 160MW in the power plant start-up operation during plasma heating. This reduction of the active power pulsed loads reduces the risk of oscillating power frequency changes. These oscillations produce transient power flows which can danger the grid stability.

	Magnet Power Converters for the New Booster of Elettra By MOLARO Denis; KORHONEN Petri; TIIHONEN Tommi; VISINTINI Roberto	[View] [Download]
Abstract: A new Full-Energy Injector for the Storage Ring of the Elettra Synchrotron Light Laboratory is under construction. High precision and reproducibility power converters will be used to supply its magnets. The excitation current waveform is a DC biased sine wave at ~3 Hz that all booster power converter have to follow synchronously. Key features are modular design comprising N 1 redundancy and energy recovery capabilities. A fully digital control has been adopted for the regulation and the PWM generation for the IGBTs. At the time of the presentation of this article, the power converters are in the final factory test phase and therefore only preliminary results on dummy loads will be reported.

	Phase-controlled line-commutated converter control in discontinuous conduction mode By PETROCELLI Roberto; UICICH Gustavo; MAESTRI Sebastian; BENEDETTI Mario	[View] [Download]
Abstract: A method for controlling line-commutated converters in discontinuous conduction mode is presented. The proposed strategy is based on the modification of the firing angle in order to produce the same effects on the average output current regardless the conduction mode. The compensation is based in an on-line estimation of the rectifier average output current in order to achieve the compensation angle. Simulations on a high-precision current control system are presented.

	The BTF (Beam Transfer Facility) DC/Pulsed 50 kW power converter for DAFNE injector By MACCAFERRI Remo; CHIUSANO Frederico	[View] [Download]
Abstract: This power converter energize a deflection magnet (L= 10.8 mH , R=43 mΩ). It can ramp up and down in less than 10 ms, regulate a 450 A current flat top from 5 to 960 ms with a precision better than 10-3, works in both polarities and finally can also operate as a conventional DC current generator. With respect to others similar converters (i.e. Ref [4]), its versatility and internal power consumption has been optimized without increasing too much its complexity.