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Analysis, Design and Implementation of a High Efficiency by Daher S.

By Daher S.

Faraway from the hurry of the massive cities,in tropical jungles and in arid regions,in remoted coasts and mountains,or the place else the sunshine of bulb is rare,millions of individuals nonetheless wait forthe merits of the electricity.Stand-alone renewable strength systemsmake it attainable to provide strength to those regions;this paintings is a contribution to the perception ofsystems of excessive functionality and reliability.

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2) The conversion efficiency versus power characteristic can be approximated by a straight line. This fact suggests that the efficiency characteristic of an inverter can be completely described by only 3 numbers: its no-load consumption and the two coefficients of the line that better fits the ηc curve. 3) The conversion efficiency curve of inverter-1 approximately converges to the value of 100 %, while the inverter-2 characteristic converges to a value between 98 % and 99 %. This difference can be justified by the fact that inverter-1 is based on low-frequency switching and inverter-2 is based on high-frequency.

3 Transformer specification The implemented prototype made use of a multi-winding-transformer already available. 10 shows the transformer data. 10 - Transformer data. Rated power 3000 VA Primary coil 48 V - 6,8 mΩ Secondary coil 1 12 V / 8,06 A - 18 mΩ Secondary coil 1 24 V / 8,06 A - 27 mΩ Secondary coil 1 48 V / 8,06 A - 44 mΩ Secondary coil 1 96 V / 8,06 A - 75 mΩ Secondary coil 1 192 V / 8,06 A - 130 mΩ No-load losses @48 V (RMS - square) 13 W Weight 32 Kg Size 290x108 mm Core Toroidal Conformity EN 61558 Power, voltages and currents: from manufacturer.

11 shows the switches and snubbers specifications used in the implemented prototype [94,95]. 11 - Component data for all partial output-stage modules. Stage H-bridge Out. Stage 1 Out. Stage 2 Out. Stage 3 Out. Stage 4 Out. Stage 5 [V] 48 12 24 48 96 192 MOSFET DATA Reference Vds [V] Id [A] 2x IRFP2907 75 2x 209 IRF3205 55 110 IRF3205 55 110 IRF2807 75 82 IRFP260N 200 50 APT30M40LVR 300 76 Rds [mΩ] 4,5 / 2 8 8 13 40 40 Zn [V] 66 22 34 66 130 250 Rn [Ω] 330 120 330 330 470 470 Cn [nF] 470 47 47 47 47 47 42 Analysis, design and implementation of a high efficiency multilevel converter It is important to note that MOSFET selection also took into account availability, price and conduction resistance.

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