EPE Association: EPE 2013 - DS3k: Specific Energy Conversion and Conditionning Technologies

EPE 2013 - DS3k: Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 20: Industry specific energy conversion and conditioning technologies > EPE 2013 - DS3k: Specific Energy Conversion and Conditionning Technologies

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   Analysis and Design of Single-Phase Current-source Grid-Connected PV Inverter
By Gurhan ERTASGIN, Wen SOONG, Nesimi ERTUGRUL [View]
[Download]

Abstract: This paper investigates the performance of a 150 W single-phase current-source grid-connected inverter for photovoltaic (PV) applications. The constant-current source is realized using a large DC link inductor and the inverter is implemented using a single boost switch, a H-bridge inverter and a CL output filter. Although the DC link inductor causes the inverter to be less efficient than an equivalent voltage-source inverter, it offers lower cost due to the zero-current switching and lower number of components. In addition, the output current is easily controlled using the boost switch and offers simple open-loop and feed-forward control. The paper compares the simulated and measured inverter performance with regards to output power, total harmonic distortion and power factor. Additionally the scaling of the concept to a higher power (1.2 kW) inverter was also investigated using simulations.

   Design, simulation and evaluation of GLIM-type self-oscillatingaudio amplifier
By Bas VERMULST, Elena LOMONOVA [View]
[Download]

Abstract: In this paper a GLIM-type self-oscillating audio power amplifier has been developed with excellent audioperformance. All parameters are determined algebraically by using system models. Simulation resultsshow the used models are sufficiently accurate for the design of high-quality amplifiers.

   LOW COST DESIGNS FOR DOMESTIC PV APPLICATIONS
By Guillaume LEFEVRE, Luc RAMBAUD, Laurent FOUBE, Stefan MOLLOV [View]
[Download]

Abstract: Photovoltaic (PV) inverters, whatever the rated power, have currently very high efficiency. For homesystems, cost is the key point to remain competitive. When comparing performance, the conversionefficiency is being emphasized, while the overall system harvest efficiency is unfairly neglected. Thispaper investigates specific constraints on PV inverters and offers a design methodology resulting inoptimal cost/performance designs.

   Modeling of an Ultrasonic Powder Transportation System
By Razvan CHITIC, Richard BEAREE, Frederic GIRAUD, Betty LEMAIRE-SEMAIL, Monique FAVRE, Pascal TIERCE, Jacky JEHANNO [View]
[Download]

Abstract: This paper presents a new powder transportation system that uses a high frequency flexural stationarywave coupled with a low frequency horizontal displacement of a beam to produce the transport of thepowder. The ultrasonic wave is produced with the help of piezoelectric cells glued under the beam and isused to decrease the friction coefficient between the powder and the beam surface. The powder transportmechanism has been described using a simplified mathematical model.

   Multi-objective optimization of a flash lamp drive
By Ratmir GELAGAEV, Jeroen ZWYSEN, Kristof ENGELEN, Peter TANT, Flip BAMELIS, Tom GEURTS, Johan DRIESEN [View]
[Download]

Abstract: To adjust the light spectrum of a flash lamp, the current flowing through the flash lamp has to be controlled. An optimal design of a switched resistor bank circuit following a predefined current profile is presented. The optimal values of the switched resistors are calculated using multi-objective optimization with genetic algorithms.

   Ohmic Heating of Food by means of High Frequency Power Inverters
By Manuel Francisco DIAZ RAMOS, Hernan Emilio TACCA [View]
[Download]

Abstract: In this paper, an ohmic heater circuit is proposed using low cost, low volume, high power factor, high efficiency, and high frequency power inverters. In order to reduce switching losses while keeping operation frequency high, the well-known techniques of zero-voltage switching (ZVS) and phase shifting control are described and used. A low frequency control loop is proposed as a way of getting low harmonic input current distortion and thus high power factor. The power stage and the control loop are shown and discussed. Experimental results are given for a single-phase, 3-kW, 60kHz-switched full bridge ZVS inverter with efficiency higher than 90\% and power factor 0.99.

   Power Electronic Interfaces for Low Voltage Residential Networks
By Evangelos ZACHARIS, Andrew CROSS, Benjamin GODFREY [View]
[Download]

Abstract: A proposal to increase the existing residential LV grid voltage from 230 V to 300 V has been made in order to increase existing network capacity. A power-electronic AC-AC converter is then used to provide 230 V at each property. The equipment can also provide power-quality improvements to the network and load. Several constraints such as temperature rise at the converter location lead to a converter design requiring very high efficiency. In this paper different AC/AC converter topologies are presented which compares the power quality benefits, size and efficiency of each converter. The design and the control technique of the most suitable topology are verified using simulation and preliminary experimentally results of prototype hardware are also included.

   Proposal of a Switched High Dynamic Series Voltage Regulator for Compensating Sags and Swells on AC voltage Source
By Pedro Aagusto FREITAS, Erico GUIMARAES, Luiz FREITAS, João VIEIRA JR. [View]
[Download]

Abstract: This paper proposes a new topological arrangement that consists in connecting the AC voltage source in series with two EIE Buck converters, one to operate in the positive half cycle and the other to operate in the negative half cycle. The control strategy is developed to achieve an AC output voltage within the limits set by standards in order to mitigate problems associated with Sags and Swells on AC voltage supply. Operating principles and the main simulation and experimental results obtained for steady-state and transient operation conditions are presented and validated on a 1 kVA experimental unit.

   Static Losses and Controllability of Current Fed Dimmable LED Drivers
By Ilya GALKIN, Oleg TETERVJONOK, Irena MILASHEVSKI [View]
[Download]

Abstract: The paper presents synthesis and comparison of several drivers of original topologies for LED dimming. The work is based on the hypothesis that the direct current control, in contrast to indirect voltage control, is very useful in LED applications where luminous flux is almost proportional to LED’s current. In order to confirm or disprove this hypothesis, several current fed LED ballasts have been synthesized based on corresponding voltage fed converters and known rules of their transformation. The synthesized circuits are mathematically described and experimentally tested. The obtained results show that the approach is useful from the point of view of controllability of LED lamp. Special attention is paid to the estimation of static losses of the LED drivers presented in the given paper. It is concluded that although these parameters are not as good as for voltage fed drivers they remain on an acceptable level. Finally, it is concluded that the current fed step-down driver is advantageous from many points of view and it is worth to work on its further improvement. At the same time, some practical difficulties of implementation of the current fed converters have been detected. This, first of all, regards to the lack of the natural current sources and the risk of their open loop operation. These problems, however, are subject of future works.

EPE 2013 - DS3k: Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 20: Industry specific energy conversion and conditioning technologies > EPE 2013 - DS3k: Specific Energy Conversion and Conditionning Technologies
	[return to parent folder]

	Analysis and Design of Single-Phase Current-source Grid-Connected PV Inverter By Gurhan ERTASGIN, Wen SOONG, Nesimi ERTUGRUL	[View] [Download]
Abstract: This paper investigates the performance of a 150 W single-phase current-source grid-connected inverter for photovoltaic (PV) applications. The constant-current source is realized using a large DC link inductor and the inverter is implemented using a single boost switch, a H-bridge inverter and a CL output filter. Although the DC link inductor causes the inverter to be less efficient than an equivalent voltage-source inverter, it offers lower cost due to the zero-current switching and lower number of components. In addition, the output current is easily controlled using the boost switch and offers simple open-loop and feed-forward control. The paper compares the simulated and measured inverter performance with regards to output power, total harmonic distortion and power factor. Additionally the scaling of the concept to a higher power (1.2 kW) inverter was also investigated using simulations.

	Design, simulation and evaluation of GLIM-type self-oscillatingaudio amplifier By Bas VERMULST, Elena LOMONOVA	[View] [Download]
Abstract: In this paper a GLIM-type self-oscillating audio power amplifier has been developed with excellent audioperformance. All parameters are determined algebraically by using system models. Simulation resultsshow the used models are sufficiently accurate for the design of high-quality amplifiers.

	LOW COST DESIGNS FOR DOMESTIC PV APPLICATIONS By Guillaume LEFEVRE, Luc RAMBAUD, Laurent FOUBE, Stefan MOLLOV	[View] [Download]
Abstract: Photovoltaic (PV) inverters, whatever the rated power, have currently very high efficiency. For homesystems, cost is the key point to remain competitive. When comparing performance, the conversionefficiency is being emphasized, while the overall system harvest efficiency is unfairly neglected. Thispaper investigates specific constraints on PV inverters and offers a design methodology resulting inoptimal cost/performance designs.

	Modeling of an Ultrasonic Powder Transportation System By Razvan CHITIC, Richard BEAREE, Frederic GIRAUD, Betty LEMAIRE-SEMAIL, Monique FAVRE, Pascal TIERCE, Jacky JEHANNO	[View] [Download]
Abstract: This paper presents a new powder transportation system that uses a high frequency flexural stationarywave coupled with a low frequency horizontal displacement of a beam to produce the transport of thepowder. The ultrasonic wave is produced with the help of piezoelectric cells glued under the beam and isused to decrease the friction coefficient between the powder and the beam surface. The powder transportmechanism has been described using a simplified mathematical model.

	Multi-objective optimization of a flash lamp drive By Ratmir GELAGAEV, Jeroen ZWYSEN, Kristof ENGELEN, Peter TANT, Flip BAMELIS, Tom GEURTS, Johan DRIESEN	[View] [Download]
Abstract: To adjust the light spectrum of a flash lamp, the current flowing through the flash lamp has to be controlled. An optimal design of a switched resistor bank circuit following a predefined current profile is presented. The optimal values of the switched resistors are calculated using multi-objective optimization with genetic algorithms.

	Ohmic Heating of Food by means of High Frequency Power Inverters By Manuel Francisco DIAZ RAMOS, Hernan Emilio TACCA	[View] [Download]
Abstract: In this paper, an ohmic heater circuit is proposed using low cost, low volume, high power factor, high efficiency, and high frequency power inverters. In order to reduce switching losses while keeping operation frequency high, the well-known techniques of zero-voltage switching (ZVS) and phase shifting control are described and used. A low frequency control loop is proposed as a way of getting low harmonic input current distortion and thus high power factor. The power stage and the control loop are shown and discussed. Experimental results are given for a single-phase, 3-kW, 60kHz-switched full bridge ZVS inverter with efficiency higher than 90\% and power factor 0.99.

	Power Electronic Interfaces for Low Voltage Residential Networks By Evangelos ZACHARIS, Andrew CROSS, Benjamin GODFREY	[View] [Download]
Abstract: A proposal to increase the existing residential LV grid voltage from 230 V to 300 V has been made in order to increase existing network capacity. A power-electronic AC-AC converter is then used to provide 230 V at each property. The equipment can also provide power-quality improvements to the network and load. Several constraints such as temperature rise at the converter location lead to a converter design requiring very high efficiency. In this paper different AC/AC converter topologies are presented which compares the power quality benefits, size and efficiency of each converter. The design and the control technique of the most suitable topology are verified using simulation and preliminary experimentally results of prototype hardware are also included.

	Proposal of a Switched High Dynamic Series Voltage Regulator for Compensating Sags and Swells on AC voltage Source By Pedro Aagusto FREITAS, Erico GUIMARAES, Luiz FREITAS, João VIEIRA JR.	[View] [Download]
Abstract: This paper proposes a new topological arrangement that consists in connecting the AC voltage source in series with two EIE Buck converters, one to operate in the positive half cycle and the other to operate in the negative half cycle. The control strategy is developed to achieve an AC output voltage within the limits set by standards in order to mitigate problems associated with Sags and Swells on AC voltage supply. Operating principles and the main simulation and experimental results obtained for steady-state and transient operation conditions are presented and validated on a 1 kVA experimental unit.

	Static Losses and Controllability of Current Fed Dimmable LED Drivers By Ilya GALKIN, Oleg TETERVJONOK, Irena MILASHEVSKI	[View] [Download]
Abstract: The paper presents synthesis and comparison of several drivers of original topologies for LED dimming. The work is based on the hypothesis that the direct current control, in contrast to indirect voltage control, is very useful in LED applications where luminous flux is almost proportional to LED’s current. In order to confirm or disprove this hypothesis, several current fed LED ballasts have been synthesized based on corresponding voltage fed converters and known rules of their transformation. The synthesized circuits are mathematically described and experimentally tested. The obtained results show that the approach is useful from the point of view of controllability of LED lamp. Special attention is paid to the estimation of static losses of the LED drivers presented in the given paper. It is concluded that although these parameters are not as good as for voltage fed drivers they remain on an acceptable level. Finally, it is concluded that the current fed step-down driver is advantageous from many points of view and it is worth to work on its further improvement. At the same time, some practical difficulties of implementation of the current fed converters have been detected. This, first of all, regards to the lack of the natural current sources and the risk of their open loop operation. These problems, however, are subject of future works.