DIY之风力发电.pdfVIP

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DIY之风力发电.pdf

Wind Turbine Designed by Dave Mussell Introduction 1 Build It! 2 Tools 2 Materials 2 Templates 3 Construction Steps 4 Part A. Frame and Base 4 Part B. Making the Coils 7 C. Build the Stator 9 D. The Rotor 10 E. The Turbine 12 F. Final Assembly 14 G. Test It! 15 Troubleshooting Tips 16 Acknowledgements 16 www.re-energy.ca © 2006 The Pembina Institute Wind Turbine Page 1 of 17 Introduction The Savonius Wind Turbine These plans are for the construction of vertical axis wind turbine, modelled after a design by the Finnish engineer S.J. Savonius in 1922. His idea was to mount two half-cylinders on a vertical shaft. It was simple to build, and could accept wind from any direction. However, it was somewhat less efficient than the more common horizontal axis turbine. The reason for the difference has to do with aerodynamics. Horizontal axis turbines have blades that create lift to spin the rotor, whereas the vertical axis design we are using here operates on the basis of drag—one side creates more drag in moving air than the other, causing the shaft spin. Permanent Magnet Alternator This wind turbine model makes its electricity with a simple generator which produces pulses of current, or alternating current. It does so by passing strong magnets over coils of fine wire. Each time a magnet passes over a coil, the coil becomes energized with electricity. With 4 coils connected together in series, the result is a quadrupling of the voltage. This is the simplest and possibly most efficient way to generate electricity, and is the same basic principle used in almost al

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