EPE Association: EPE 2007 - Subtopic 15-4

EPE 2007 - Subtopic 15-4 - DS: Power supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 15: 'Power supplies' > EPE 2007 - Subtopic 15-4 - DS: Power supplies

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   A Novel High DC Voltage Generator by LC Resonance in Supply Frequency
By GUAN Erdong; MATSUI Keiju; YAMAMOTO Isamu; ANDO Kenji [View]
[Download]

Abstract: For consumer electronics and appliances, rectifier circuits of the capacitor input type are generally used. The various harmonics generated within such a power system become a serious problem. Various studies to reduce these effects have been presented so far. However, most of these employ switching devices, such as MOSFETs and the like. Removing the need for switching devices renders the systems more tolerant to over-load, and brings low RF noise benefits. The authors have proposed a power factor correction scheme using a LC circuit, resonant at a commercial frequency, without using switching devices. This method makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency. It is found that a output high voltage may be readily obtained by means of the LC resonance in this PFC circuit, such that the dc output voltage achieved can be as great as ten times the ac input voltage. In this paper the results are reported and confirmed from both theoretical and experimental implementations.

   A Novel Resonant Boost Converter with Double Switches Improved by PLL
By HASEGAWA Masaru; MATSUI Keiju; YAMAMOTO Isamu [View]
[Download]

Abstract: In recent years, various clean energies have been developed, and their practical use is expected for a fuel cell, a solar cell and so on. Since these are low voltage, voltage boost is needed in practical applications. This paper proposes a novel converter which is used for voltage boost using LC resonance. The switch is turned-on and off at the instant when current becomes zero due to LC resonance, that is called zero current switching. The resonant efficiency can be much improved by using double switch circuits, where resonance is implemented alternately and efficiently. This circuit would be effective for above mentioned new electric power sources. In order to improve various operational characteristics, PLL(phase locked loop) is applied to the control circuit. The proposal circuit is confirmed by the simulation and the experiment.

   A Single-Stage Power Factor Correction Switched Mode Power Supply
By POSTIGLIONE Cicero; PERIN Arnaldo [View]
[Download]

Abstract: This paper presents a single-stage power factor corrected ac-dc converter based on a half-bridge topology. The proposed converter make use of the charge-pump and interleaving techniques resulting in near unity power factor and ripple free input current, meeting the IEC 61000-3-2 regulations for wide-load ranges. It is also a cost effective and competitive solution for 100 - 600 W applications where a two stage approach is costly and passive filters are not recommended. It works with zero voltage switching (ZVS) for a reasonable load variation range, achieving higher efficiency at higher load conditions. To overcome the excessive elevation of the Dc-link voltage in lower load situations, a common problem of single-stage PFC solutions, frequency variation and PWM control are used simultaneously.

   An Electronic Ballast for Driving HID Lamps controlled with a FPGA Device
By FONTOURA Kleber L.; VIEIRA JR Joao Batista; FREITAS Luiz C.; COELHO Ernane A. A.; FARIAS Valdeir J. [View]
[Download]

Abstract: This paper presents the application of a Field Programmable Gate Array (FPGA) device to control an electronic ballast for low wattage high intensity discharge lamps based on Buck-Boost cascade converter. The proportional-integral controller was digitally implemented and experimental results are presented.

   Cancellation of the Common Mode Voltage in a 3-phase Current Source Rectifier
By CLARE J.C; JUNAIDI Aziz; KLUMPNER Christian [View]
[Download]

Abstract: This paper analyses two methods that eliminate the low-frequency common mode voltage in the dclink voltage of a current source rectifier. This is achieved by software and hardware modification on standard buck rectifier. It is shown through simulations and experiment that the proposed topology can effectively eliminate the low frequency common mode voltage component.

   Comparative study of the optimal number of phases for interleaved Voltage Regulator Modules
By CHAPTAL Jean Louis; SIMON Adan; BOITIER Vincent; ALONSO Corinne; ESTIBALS Bruno [View]
[Download]

Abstract: This paper studies several solutions to choose the most appropriated number of phases for a high-current low-voltage interleaved Voltage Regulator Module (VRM). Several criteria have been considered as transient responses, harmonic contents (EMI levels) or converter efficiency to find the optimal topology of the converter. A theoretical comparison between classical single-phase converters with those multi-phased has been established. Finally, we have extracted some results to determine the optimal number of phases.

   Development of SMES system using dry-type superconducting coil
By HEMMMI Tsutomu; CHIKARAISHI Hirotaka; KUGE Atsuko; MITO Toshiyuki; OKUMURA Kagao; ABE Ryo [View]
[Download]

Abstract: For a SMES to protect the whole facility from momentaly voltage drop, a helium free superconducting pulse coil using conduction cooling is developed. Also short time power converters and a high-speed voltage drop detector for a 1MJ class SMES are designed. To confirm the design of components, a 100kJ class demo system is constricted tested. After that the half part of 1MJ SMES is constricted for operation tests.

   Envelope Model for Resonant Converters and Application in LLC Converters
By PETZOLDT Juergen; REIMANN Tobias; TIAN Jian; SCHERF Marko; BERGER Gotthard [View]
[Download]

Abstract: This paper presents the large and small signal envelope models for switching networks and rectifiers with variable frequency phase-shifted control for resonant converters. The model can be used to quickly perform DC and AC analysis with SPICE-compatible soft tools for a converter with frequency control, duty cycle control and variable frequency and variable control. Then the large signal envelope model of a LLC converter is given, the DC and AC sweep results with PSPICE are presented, by which its characteristic can be analyzed. Finally the verified results are given.

   Implementation of supercapacitors in uninterruptible power supplies
By GALKIN Ilja; STEPANOV Andrew; BISENIEKS Lauris [View]
[Download]

Abstract: The given paper deals with uninterruptible power supplies with supercapacitors. Parameters of the supercapacitors and common lead-acid batteries are compared. Various opportunities of supercapacitor implementation into the uninterruptible power supplies are discussed, pros and cons are analyzed. Initial numerical comparison of energy capacity for these devices is done. Experimental testing of the supercapacitors and batteries as energy sources for a boost converter has also been made.

   Influence of power semiconductor and power supply design on EMC relevant emissions by the example of an arc welding inverter arrangement
By DOEBBELIN Reinhard; HERMS Ronny; LINDEMANN Andreas [View]
[Download]

Abstract: The switching actions of power semiconductors cause unwanted electromagnetic emissions of power electronic apparatuses. In the paper, influencing aspects e.g. asymmetry of coupling paths, realization of chip-to-ground isolation and switching characteristics of the applied power semiconductors shall be discussed.

   Long Life UPS based on Active filter and Flywheel without Electrolytic Capacitor
By KIYOSHI Ohishi; SHIBATA Junji; ANDO Itaru; HAGA Hitoshi [View]
[Download]

Abstract: This paper describes single-phase Uninterruptible Power Supply (UPS) with active filter and flywheel. The UPS consists of a diode rectifier, a single-phase inverter, a flywheel energy storage unit with PM motor/generator and a three-phase inverter, not using a bulky electrolytic capacitor, battery and filter reactor. It contains many excellent characteristics: small size, lightweight and maintenance-free. The switching frequency of the single-phase inverter is more efficient with low frequency, which is synchronous with source voltage. However, it can supply stable power with the load. The unity input power factor control and the sinusoidal current waveform control of input side are realized by the active filter ability with quick energy charge/discharge control based on flywheel. The proposed system gives rise to sinusoidal output voltage waveform without LC filter. In this paper, the experiments are carried out under the structural conditions of using the pilot flywheel unit and the driving simulator of PM motor/generator connected to flywheel. The results indicate that the UPS has a desired active filter operation, and supplies the stable power with the load under any power condition.

   Microcontroller-Based Quadratic Buck Converter Used as LED lamp driver
By FARIAS Valdeir J.; DEMIAN JR Aziz E.; COELHO Ernane A. A.; FREITAS Luiz C.; BRITTO Jonas R.; VIEIRA JR Joao Batista [View]
[Download]

Abstract: This paper presents a new proposal for driving LED lamps through the use of a micro controlled Quadratic Buck DC/DC converter. The main focus is to improve the LED driver's characteristics using the microcontroller PIC16F873A, thus achieving greater durability and efficiency. Mathematical analyses and experimental results are presented in this paper.

   Multi-Interleaved Zero-Ripple VRM to Power Future Microprocessors
By GARINTO Dodi [View]
[Download]

Abstract: This paper presents a converter architecture derived from the buck topology with merging principle of the multi-interleaving and zero-ripple techniques. The converter not only produces zero-ripple output, but also provides low-ripple input, so that filter requirements in the input and output sides can be reduced significantly. The proposed converter shows an ideal solution to power future microprocessors.

   Multiphase Converter Structures AppliedTo Integrated Micro-Power Application Circuits.
By PETIBON Stephane [View]
[Download]

Abstract: Today, advances in the technology of power systems integration allow new multiple functions in power conversion. However, performances are not improved enough to have today a complete DC-DC converter integrated on a same chip. This study proposes a comparison between different DC-DC converter topologies to deduce the most adapted for a future complete integrated circuit version. For this type of circuit, high efficiencies for high performing power densities storage and transfer are necessary.

   OUTPUT VOLTAGE CONTROL OF A FOUR-LEG INVERTER BASED THREE-PHASE UPS UTILIZING STATIONARY FRAME RESONANT FILTER BANKS
By DEMIRKUTLU Eyyup; HAVA Ahmet [View]
[Download]

Abstract: An all scalar PWM and control approach for the four-leg inverter based three phase transformerless UPS is proposed. The output voltage of each phase is controlled independently and its controller is formed by a stationary frame resonant filter bank accompanied with proportional control and output capacitor current based active damping loops. The resonant filter bank consists of the fundamental component controller and one controller for each dominant harmonic. The simple to implement scalar control method exhibits superior overall steady-state and dynamic performance in the UPS application. Utilizing the inverter zero-state partitioning, a generalized form of scalar PWM for the four-leg inverter is developed. A novel minimum loss discontinuous PWM (MLDPWM) method, which provides minimum switching losses under all operating conditions (including unbalanced load operation) is derived. This simple scalar method provides superior performance and unlike the vector methods it is easy to implement. The controller and modulator design and implementation details for the system are given. Linear and nonlinear loads for balanced and unbalanced load operating conditions are considered. The scalar control and PWM methods are proven by means of theory, simulations, and thorough laboratory experiments of a 5 kVA UPS system.

   ZETA DC/DC Converter Used as LED lamp drive
By FREITAS Luiz C; DEMIAN JR Aziz E.; COELHO Ernane A. A.; VIEIRA JR Joao Batista; FARIAS Valdeir J.; BRITTO Jonas R. [View]
[Download]

Abstract: This paper presents a new proposal of LED lamp driver using the ZETA DC/DC converter. The main focus is to improve the LED drive characteristcs using the DC/DC converter ZETA, therefore, greater durability and efficiency can be achieved. Through the result experimental it is possible to verify the performance of the converter as well as the luminous efficiency of the LED Lamp.

EPE 2007 - Subtopic 15-4 - DS: Power supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 15: 'Power supplies' > EPE 2007 - Subtopic 15-4 - DS: Power supplies
	[return to parent folder]

	A Novel High DC Voltage Generator by LC Resonance in Supply Frequency By GUAN Erdong; MATSUI Keiju; YAMAMOTO Isamu; ANDO Kenji	[View] [Download]
Abstract: For consumer electronics and appliances, rectifier circuits of the capacitor input type are generally used. The various harmonics generated within such a power system become a serious problem. Various studies to reduce these effects have been presented so far. However, most of these employ switching devices, such as MOSFETs and the like. Removing the need for switching devices renders the systems more tolerant to over-load, and brings low RF noise benefits. The authors have proposed a power factor correction scheme using a LC circuit, resonant at a commercial frequency, without using switching devices. This method makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency. It is found that a output high voltage may be readily obtained by means of the LC resonance in this PFC circuit, such that the dc output voltage achieved can be as great as ten times the ac input voltage. In this paper the results are reported and confirmed from both theoretical and experimental implementations.

	A Novel Resonant Boost Converter with Double Switches Improved by PLL By HASEGAWA Masaru; MATSUI Keiju; YAMAMOTO Isamu	[View] [Download]
Abstract: In recent years, various clean energies have been developed, and their practical use is expected for a fuel cell, a solar cell and so on. Since these are low voltage, voltage boost is needed in practical applications. This paper proposes a novel converter which is used for voltage boost using LC resonance. The switch is turned-on and off at the instant when current becomes zero due to LC resonance, that is called zero current switching. The resonant efficiency can be much improved by using double switch circuits, where resonance is implemented alternately and efficiently. This circuit would be effective for above mentioned new electric power sources. In order to improve various operational characteristics, PLL(phase locked loop) is applied to the control circuit. The proposal circuit is confirmed by the simulation and the experiment.

	A Single-Stage Power Factor Correction Switched Mode Power Supply By POSTIGLIONE Cicero; PERIN Arnaldo	[View] [Download]
Abstract: This paper presents a single-stage power factor corrected ac-dc converter based on a half-bridge topology. The proposed converter make use of the charge-pump and interleaving techniques resulting in near unity power factor and ripple free input current, meeting the IEC 61000-3-2 regulations for wide-load ranges. It is also a cost effective and competitive solution for 100 - 600 W applications where a two stage approach is costly and passive filters are not recommended. It works with zero voltage switching (ZVS) for a reasonable load variation range, achieving higher efficiency at higher load conditions. To overcome the excessive elevation of the Dc-link voltage in lower load situations, a common problem of single-stage PFC solutions, frequency variation and PWM control are used simultaneously.

	An Electronic Ballast for Driving HID Lamps controlled with a FPGA Device By FONTOURA Kleber L.; VIEIRA JR Joao Batista; FREITAS Luiz C.; COELHO Ernane A. A.; FARIAS Valdeir J.	[View] [Download]
Abstract: This paper presents the application of a Field Programmable Gate Array (FPGA) device to control an electronic ballast for low wattage high intensity discharge lamps based on Buck-Boost cascade converter. The proportional-integral controller was digitally implemented and experimental results are presented.

	Cancellation of the Common Mode Voltage in a 3-phase Current Source Rectifier By CLARE J.C; JUNAIDI Aziz; KLUMPNER Christian	[View] [Download]
Abstract: This paper analyses two methods that eliminate the low-frequency common mode voltage in the dclink voltage of a current source rectifier. This is achieved by software and hardware modification on standard buck rectifier. It is shown through simulations and experiment that the proposed topology can effectively eliminate the low frequency common mode voltage component.

	Comparative study of the optimal number of phases for interleaved Voltage Regulator Modules By CHAPTAL Jean Louis; SIMON Adan; BOITIER Vincent; ALONSO Corinne; ESTIBALS Bruno	[View] [Download]
Abstract: This paper studies several solutions to choose the most appropriated number of phases for a high-current low-voltage interleaved Voltage Regulator Module (VRM). Several criteria have been considered as transient responses, harmonic contents (EMI levels) or converter efficiency to find the optimal topology of the converter. A theoretical comparison between classical single-phase converters with those multi-phased has been established. Finally, we have extracted some results to determine the optimal number of phases.

	Development of SMES system using dry-type superconducting coil By HEMMMI Tsutomu; CHIKARAISHI Hirotaka; KUGE Atsuko; MITO Toshiyuki; OKUMURA Kagao; ABE Ryo	[View] [Download]
Abstract: For a SMES to protect the whole facility from momentaly voltage drop, a helium free superconducting pulse coil using conduction cooling is developed. Also short time power converters and a high-speed voltage drop detector for a 1MJ class SMES are designed. To confirm the design of components, a 100kJ class demo system is constricted tested. After that the half part of 1MJ SMES is constricted for operation tests.

	Envelope Model for Resonant Converters and Application in LLC Converters By PETZOLDT Juergen; REIMANN Tobias; TIAN Jian; SCHERF Marko; BERGER Gotthard	[View] [Download]
Abstract: This paper presents the large and small signal envelope models for switching networks and rectifiers with variable frequency phase-shifted control for resonant converters. The model can be used to quickly perform DC and AC analysis with SPICE-compatible soft tools for a converter with frequency control, duty cycle control and variable frequency and variable control. Then the large signal envelope model of a LLC converter is given, the DC and AC sweep results with PSPICE are presented, by which its characteristic can be analyzed. Finally the verified results are given.

	Implementation of supercapacitors in uninterruptible power supplies By GALKIN Ilja; STEPANOV Andrew; BISENIEKS Lauris	[View] [Download]
Abstract: The given paper deals with uninterruptible power supplies with supercapacitors. Parameters of the supercapacitors and common lead-acid batteries are compared. Various opportunities of supercapacitor implementation into the uninterruptible power supplies are discussed, pros and cons are analyzed. Initial numerical comparison of energy capacity for these devices is done. Experimental testing of the supercapacitors and batteries as energy sources for a boost converter has also been made.

	Influence of power semiconductor and power supply design on EMC relevant emissions by the example of an arc welding inverter arrangement By DOEBBELIN Reinhard; HERMS Ronny; LINDEMANN Andreas	[View] [Download]
Abstract: The switching actions of power semiconductors cause unwanted electromagnetic emissions of power electronic apparatuses. In the paper, influencing aspects e.g. asymmetry of coupling paths, realization of chip-to-ground isolation and switching characteristics of the applied power semiconductors shall be discussed.

	Long Life UPS based on Active filter and Flywheel without Electrolytic Capacitor By KIYOSHI Ohishi; SHIBATA Junji; ANDO Itaru; HAGA Hitoshi	[View] [Download]
Abstract: This paper describes single-phase Uninterruptible Power Supply (UPS) with active filter and flywheel. The UPS consists of a diode rectifier, a single-phase inverter, a flywheel energy storage unit with PM motor/generator and a three-phase inverter, not using a bulky electrolytic capacitor, battery and filter reactor. It contains many excellent characteristics: small size, lightweight and maintenance-free. The switching frequency of the single-phase inverter is more efficient with low frequency, which is synchronous with source voltage. However, it can supply stable power with the load. The unity input power factor control and the sinusoidal current waveform control of input side are realized by the active filter ability with quick energy charge/discharge control based on flywheel. The proposed system gives rise to sinusoidal output voltage waveform without LC filter. In this paper, the experiments are carried out under the structural conditions of using the pilot flywheel unit and the driving simulator of PM motor/generator connected to flywheel. The results indicate that the UPS has a desired active filter operation, and supplies the stable power with the load under any power condition.

	Microcontroller-Based Quadratic Buck Converter Used as LED lamp driver By FARIAS Valdeir J.; DEMIAN JR Aziz E.; COELHO Ernane A. A.; FREITAS Luiz C.; BRITTO Jonas R.; VIEIRA JR Joao Batista	[View] [Download]
Abstract: This paper presents a new proposal for driving LED lamps through the use of a micro controlled Quadratic Buck DC/DC converter. The main focus is to improve the LED driver's characteristics using the microcontroller PIC16F873A, thus achieving greater durability and efficiency. Mathematical analyses and experimental results are presented in this paper.

	Multi-Interleaved Zero-Ripple VRM to Power Future Microprocessors By GARINTO Dodi	[View] [Download]
Abstract: This paper presents a converter architecture derived from the buck topology with merging principle of the multi-interleaving and zero-ripple techniques. The converter not only produces zero-ripple output, but also provides low-ripple input, so that filter requirements in the input and output sides can be reduced significantly. The proposed converter shows an ideal solution to power future microprocessors.

	Multiphase Converter Structures AppliedTo Integrated Micro-Power Application Circuits. By PETIBON Stephane	[View] [Download]
Abstract: Today, advances in the technology of power systems integration allow new multiple functions in power conversion. However, performances are not improved enough to have today a complete DC-DC converter integrated on a same chip. This study proposes a comparison between different DC-DC converter topologies to deduce the most adapted for a future complete integrated circuit version. For this type of circuit, high efficiencies for high performing power densities storage and transfer are necessary.

	OUTPUT VOLTAGE CONTROL OF A FOUR-LEG INVERTER BASED THREE-PHASE UPS UTILIZING STATIONARY FRAME RESONANT FILTER BANKS By DEMIRKUTLU Eyyup; HAVA Ahmet	[View] [Download]
Abstract: An all scalar PWM and control approach for the four-leg inverter based three phase transformerless UPS is proposed. The output voltage of each phase is controlled independently and its controller is formed by a stationary frame resonant filter bank accompanied with proportional control and output capacitor current based active damping loops. The resonant filter bank consists of the fundamental component controller and one controller for each dominant harmonic. The simple to implement scalar control method exhibits superior overall steady-state and dynamic performance in the UPS application. Utilizing the inverter zero-state partitioning, a generalized form of scalar PWM for the four-leg inverter is developed. A novel minimum loss discontinuous PWM (MLDPWM) method, which provides minimum switching losses under all operating conditions (including unbalanced load operation) is derived. This simple scalar method provides superior performance and unlike the vector methods it is easy to implement. The controller and modulator design and implementation details for the system are given. Linear and nonlinear loads for balanced and unbalanced load operating conditions are considered. The scalar control and PWM methods are proven by means of theory, simulations, and thorough laboratory experiments of a 5 kVA UPS system.

	ZETA DC/DC Converter Used as LED lamp drive By FREITAS Luiz C; DEMIAN JR Aziz E.; COELHO Ernane A. A.; VIEIRA JR Joao Batista; FARIAS Valdeir J.; BRITTO Jonas R.	[View] [Download]
Abstract: This paper presents a new proposal of LED lamp driver using the ZETA DC/DC converter. The main focus is to improve the LED drive characteristcs using the DC/DC converter ZETA, therefore, greater durability and efficiency can be achieved. Through the result experimental it is possible to verify the performance of the converter as well as the luminous efficiency of the LED Lamp.