The Experts below are selected from a list of 3843 Experts worldwide ranked by ideXlab platform
Niranjan Debnath - One of the best experts on this subject based on the ideXlab platform.
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harmonics analysis in a dc dc converter based line frequency inverter for Domestic Lighting loads
International Symposium on Robotics, 2016Co-Authors: Ahamed Khan, Maiyaki Abdullahi Alkali, S Parasuraman, I Elamvazuthi, M Amudha, Niranjan DebnathAbstract:This paper presents harmonics improvement in a DC-DC converter based line frequency inverter for Domestic Lighting loads. Harmonics problem in power electronics converters is not a new phenomenon as over the decade succeeded in effecting our power output. It is also recognized to be a problem that would destabilize the reliability of power system, to overcome this problem, the design of a suitable filter must be implemented. For this project, a LC Low Pass filter has been chosen to reduce the harmonics in the system to get a 5W power output. The input voltage is a DC battery having power capacity of 24W, 6V DC has been chosen as the input DC voltage and it will be stepped up to 12V DC using the push-pull converter. A voltage regulator circuit is installed to regulate the voltage to the microcontroller chip PIC16F877A that has been used as the main control unit for this project having the capability to generate Pulse Width Modulation (PMW) signals to drive the MOSFET turn ON and OFF. The 12V DC will be inverted to 220V AC using the line frequency inverter. The bulb having the power capacity of 6W is used as the output Lighting loads.
Claude Daul - One of the best experts on this subject based on the ideXlab platform.
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prospecting Lighting applications with ligand field tools and density functional theory a first principles account of the 4f7 4f65d1 luminescence of csmgbr3 eu2
Inorganic Chemistry, 2015Co-Authors: Harry Ramanantoanina, Werner Urland, Fanica Cimpoesu, Christian Gottel, Mohammed Sahnoun, Benjamin Herden, Markus Suta, Claudia Wickleder, Claude DaulAbstract:The most efficient way to provide Domestic Lighting nowadays is by light-emitting diodes (LEDs) technology combined with phosphors shifting the blue and UV emission toward a desirable sunlight spectrum. A route in the quest for warm-white light goes toward the discovery and tuning of the lanthanide-based phosphors, a difficult task, in experimental and technical respects. A proper theoretical approach, which is also complicated at the conceptual level and in computing efforts, is however a profitable complement, offering valuable structure–property rationale as a guideline in the search of the best materials. The Eu2+-based systems are the prototypes for ideal phosphors, exhibiting a wide range of visible light emission. Using the ligand field concepts in conjunction with density functional theory (DFT), conducted in nonroutine manner, we develop a nonempirical procedure to investigate the 4f7–4f65d1 luminescence of Eu2+ in the environment of arbitrary ligands, applied here on the CsMgBr3:Eu2+-doped mater...
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ligand field density functional theory for the prediction of future Domestic Lighting
Physical Chemistry Chemical Physics, 2014Co-Authors: Harry Ramanantoanina, Werner Urland, Amador Garciafuente, Fanica Cimpoesu, Claude DaulAbstract:We deal with the computational determination of the electronic structure and properties of lanthanide ions in complexes and extended structures having open-shell f and d configurations. Particularly, we present conceptual and methodological issues based on Density Functional Theory (DFT) enabling the reliable calculation and description of the f → d transitions in lanthanide doped phosphors. We consider here the optical properties of the Pr3+ ion embedded into various solid state fluoride host lattices, for the prospection and understanding of the so-called quantum cutting process, being important in the further quest of warm-white light source in light emitting diodes (LED). We use the conceptual formulation of the revisited ligand field (LF) theory, fully compatibilized with the quantum chemistry tools: LFDFT. We present methodological advances for the calculations of the Slater–Condon parameters, the ligand field interaction and the spin–orbit coupling constants, important in the non-empirical parameterization of the effective Hamiltonian adjusted from the ligand field theory. The model shows simple procedure using less sophisticated computational tools, which is intended to contribute to the design of modern phosphors and to help to complement the understanding of the 4fn → 4fn−15d1 transitions in any lanthanide system.
Ahamed Khan - One of the best experts on this subject based on the ideXlab platform.
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harmonics analysis in a dc dc converter based line frequency inverter for Domestic Lighting loads
International Symposium on Robotics, 2016Co-Authors: Ahamed Khan, Maiyaki Abdullahi Alkali, S Parasuraman, I Elamvazuthi, M Amudha, Niranjan DebnathAbstract:This paper presents harmonics improvement in a DC-DC converter based line frequency inverter for Domestic Lighting loads. Harmonics problem in power electronics converters is not a new phenomenon as over the decade succeeded in effecting our power output. It is also recognized to be a problem that would destabilize the reliability of power system, to overcome this problem, the design of a suitable filter must be implemented. For this project, a LC Low Pass filter has been chosen to reduce the harmonics in the system to get a 5W power output. The input voltage is a DC battery having power capacity of 24W, 6V DC has been chosen as the input DC voltage and it will be stepped up to 12V DC using the push-pull converter. A voltage regulator circuit is installed to regulate the voltage to the microcontroller chip PIC16F877A that has been used as the main control unit for this project having the capability to generate Pulse Width Modulation (PMW) signals to drive the MOSFET turn ON and OFF. The 12V DC will be inverted to 220V AC using the line frequency inverter. The bulb having the power capacity of 6W is used as the output Lighting loads.
Maiyaki Abdullahi Alkali - One of the best experts on this subject based on the ideXlab platform.
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harmonics analysis in a dc dc converter based line frequency inverter for Domestic Lighting loads
International Symposium on Robotics, 2016Co-Authors: Ahamed Khan, Maiyaki Abdullahi Alkali, S Parasuraman, I Elamvazuthi, M Amudha, Niranjan DebnathAbstract:This paper presents harmonics improvement in a DC-DC converter based line frequency inverter for Domestic Lighting loads. Harmonics problem in power electronics converters is not a new phenomenon as over the decade succeeded in effecting our power output. It is also recognized to be a problem that would destabilize the reliability of power system, to overcome this problem, the design of a suitable filter must be implemented. For this project, a LC Low Pass filter has been chosen to reduce the harmonics in the system to get a 5W power output. The input voltage is a DC battery having power capacity of 24W, 6V DC has been chosen as the input DC voltage and it will be stepped up to 12V DC using the push-pull converter. A voltage regulator circuit is installed to regulate the voltage to the microcontroller chip PIC16F877A that has been used as the main control unit for this project having the capability to generate Pulse Width Modulation (PMW) signals to drive the MOSFET turn ON and OFF. The 12V DC will be inverted to 220V AC using the line frequency inverter. The bulb having the power capacity of 6W is used as the output Lighting loads.
S Parasuraman - One of the best experts on this subject based on the ideXlab platform.
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harmonics analysis in a dc dc converter based line frequency inverter for Domestic Lighting loads
International Symposium on Robotics, 2016Co-Authors: Ahamed Khan, Maiyaki Abdullahi Alkali, S Parasuraman, I Elamvazuthi, M Amudha, Niranjan DebnathAbstract:This paper presents harmonics improvement in a DC-DC converter based line frequency inverter for Domestic Lighting loads. Harmonics problem in power electronics converters is not a new phenomenon as over the decade succeeded in effecting our power output. It is also recognized to be a problem that would destabilize the reliability of power system, to overcome this problem, the design of a suitable filter must be implemented. For this project, a LC Low Pass filter has been chosen to reduce the harmonics in the system to get a 5W power output. The input voltage is a DC battery having power capacity of 24W, 6V DC has been chosen as the input DC voltage and it will be stepped up to 12V DC using the push-pull converter. A voltage regulator circuit is installed to regulate the voltage to the microcontroller chip PIC16F877A that has been used as the main control unit for this project having the capability to generate Pulse Width Modulation (PMW) signals to drive the MOSFET turn ON and OFF. The 12V DC will be inverted to 220V AC using the line frequency inverter. The bulb having the power capacity of 6W is used as the output Lighting loads.