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Transcript
P12414: Bicycle Energy Harvester 2011-2012 Objective: To transform mechanical energy produced by a bicycle to electrical energy with intention to charge a cell phone. Our device is designed to be inexpensive to build and easy to install, maintain and use. [2] Brenda Lisitano [5] Dan Tobin [4] Aaron Sieczkarek [1] Zheng (Flora) Li [3] Amina Purak ME ME ME EE IE Figure 1: Motor Housing Assembly Figure 2: Electronics Box Assembly Background and Motivation: People in countries with inadequate infrastructure have an unmet need for electricity. Resources for creating and storing power are difficult to obtain. This system provides the energy required for communication, and light as well as for other personal electronics once basic needs are met (i.e. GPS, MP3, etc.). Figure 3: Motor Housing Assembly [CAD] 12V DC motor U4 LM340-5 IN GND 1 Figure 4: Electronics Box Assembly [CAD] Program: Solidworks Total Part Files: 29 Distinct Parts OUT 2 1 3 Concept Selection: Initial concepts included harvesting energy via vibration, building a generator with magnets on the spokes, a hub generator and the chosen design of a roller with a motor. Ease of use and adaptability are the main reasons for the final selection. C7 10u C8 10u C9 .1u A-type USB Connector 4 Results & Conclusions: Our device shows promise for a system that can be manufactured and utilized in countries such as Haiti Future Recommendations: System optimization can be completed by creating iterations with less parts for mass production. Also, waste energy collection, to only harvest energy when the user signals could be an improvement. 0 Figure 5: Voltage Regulating Circuit Circuit Discussion: The circuit for the device conditions and regulates the electric power generated by a 12V DC motor. The three capacitors stabilize the non-linear voltage input while a 5V voltage regulator reduces the voltage to a 5V constant output. The power is supplied to small electronic devices via a standard A-type USB connector. Specification Units Ideal Value Actual Value Met Device Cost $(US) <20 $16.62 Range of Bikes Tire size (cm)/(in) 60.671.1(cm)/ 24-28 (in) 60.9668.58(cm)/ 24-27(in) √ √ Range of Phones Figure 6: Required Velocity Calculations In order to harvest the bicycles energy the device must output a minimum voltage. This voltage will then be transferred to a device to store the energy for later use. Dust Proof Water Proof % of top 10 selling Haitian phones IEC60529 Level IEC60529 Level √ 60% 60% 6 6 √ 4 4 √ Acknowledgements- Special thanks to Ms. Sarah Brownell, R Community Bikes, Mr. Gerry Garavuso For more information please visit our website at : https://edge.rit.edu/content/P12414/public/Home