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Measure Wind Speed. 9v> V alt > 15v. Set Duty Cycle Ratio. Calculate Alternator Voltage. Measure Battery Voltage. Measure Shaft RPMs. Log Data . Determine Battery Charge State. Hybrid VAWT Design in SolidWorks. DC-DC Converter. Alternator. Rectifier. Battery. Inverter. Load.
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Measure Wind Speed 9v> Valt > 15v Set Duty Cycle Ratio Calculate Alternator Voltage Measure Battery Voltage Measure Shaft RPMs Log Data Determine Battery Charge State Hybrid VAWT Design in SolidWorks DC-DC Converter Alternator Rectifier Battery Inverter Load Control Algorithm • Alternator with rewound stator for higher voltages at lower rotational speeds • Buck/boost converter topology allows for output voltages above and below input • AGM battery for safety and depth of discharge • Anemometer and Hall-effect transistor for wind speed and RPM sensing • Basic Stamp 2psx controls DC-DC converter duty cycle and records sensor data • Parallax PWMPAL coprocessor allows Basic Stamp to output PWM signal while also running the control algorithm Buck/Boost Converter Topology Once the turbine manufacturing is completed, we will evaluate its performance in different wind speeds. With this data, the DC-DC converter can be optimized for the most frequent turbine RPMs. We will also investigate more efficient MOSFET driving techniques.