Senior Project, "Model Power System"
pack removed, so it produces a 3 phase AC voltage. Once a field current is applied, the alternator produces roughly 40VAC phase-to-phase. The ...
Testing My Wind Turbine (HAWT)
1ft long plus 4 inches to mount it to the hub. The alternator uses 12 magnets and 9 coils, 3 coils on each phase. ... Wind HAWT science power free ...
Understanding Wind Power
Small wind-electric systems can make available electricity on isolated, off-grid sites, or directly in town linked to the utility grid. While wind systems need additional maintenance and require more attention than solar-electric or microhydro-electric systems, if you invest up front in high-quality equipment, design, and installation, wind-power systems can make economic and environmental sense. They also produce a great deal of pleasure-thereВґs nothing quite like watching your wind generator change a summer wind or a winter storm into electrical energy. The blades use engineered airfoils, matched to the alternator, that capture the windВґs force. Nearly all current wind generators make use of three blades, the best compromise between the utmost efficiency possible (one blade) and the equilibrium that comes with multiple rotors. Together, the blades and the core they are attached to are termed the rotor, which is the collector of the unit, intercepting winds that pass by. Most turbines on the marketplace today are upwind machines-their blades are on the windward side of the tower. A few downwind machines are offered, but neither design has a clear working advantage over the other. In most small-scale designs, the rotor is attached directly to the shaft of a permanent magnet alternator, which creates rough, three-phase AC. Wild, three-phase electricity means that the voltage and frequency change always with the wind speed. They are not set like the 60 Hz, 120 VAC electricity coming out of everyday household outlets. The wild production is rectified to DC to either charge batteries or feed a grid-synchronous inverter. In nearly all configurations (up to 15 KW in peak capacity), the rotor is generally connected directly to the alternator, which eliminates the added upkeep of gears. In systems 20 KW and larger, as well as a few smaller wind systems (like the Endurance, Tulipo, or Aircon), a gearbox is used to boost alternator speed from a slower revolving rotor. The blades...