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Solar Charger

Solar Charger. Roya Sabri , Marcos López , Aniela Chertavian , Robert López , Octavio Viramontes , and Amanda Alvarado. PURPOSE. -To learn about solar cells -Develop a way to transfer solar energy to charge up a battery -Promote better understanding of alternative energy.

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Solar Charger

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  1. Solar Charger RoyaSabri, Marcos López, Aniela Chertavian, Robert López, OctavioViramontes, and Amanda Alvarado

  2. PURPOSE -To learn about solar cells -Develop a way to transfer solar energy to charge up a battery -Promote better understanding of alternative energy

  3. SYSTEM ARCHITECTURE Solar Cell Inductor Diode Capacitor MOSFET Battery Triangle Wave Generator PWM

  4. COMPONENT #5 SOLAR CELL - Converts light energy into electricity - Power source for the charger

  5. COMPONENT #1 BOOST CONVERTER -Steps up voltage from low to high value INGREDIENTS! Capacitor: Two parallel plates storing electric charge Inductor: A coil of wire enclosing magnetic flux Switch: On/Off- can be implemented using a FET Diode: Allows the flow of current in only one direction

  6. COMPONENT #3 INDUCTOR AND CAPACITOR -Inductor- stores energy in a magnetic field created by the electric current passing through it. -Capacitor- pair of conductors separated by a dielectric (insulator). -When there is a difference across the conductors, energy is stored and a electrical force between the conductors is formed.

  7. COMPONENT #2 MOSFET SWITCH -Transistor that is a three terminal device… SOURCE, GATE, DRAIN. -Supplies the circuit with power -Functions like a switch

  8. COMPONENT #4 DIODE -Allows flow of current in only one direction - Faucet analogy

  9. COMPONENT #6 OP AMP (OPERATION AMPLIFIER) - DC-coupled voltage amplifier with a differential input and a single-ended output.

  10. COMPONENT #7 TRIANGLE WAVE GENERATOR - Generates pulses of energy which are created by an amplification of the difference between positive and negative input values from the OP AMP.

  11. COMPONENT #8 PULSE WIDTH MODULATOR (PWM) - Provides intermediate amounts of electric power between off and on. A switch provides full power when it is on and zero output when it is off. Voltage Time

  12. KNEE POINT Knee Point – 3.6 Volts Current Voltage

  13. COMPONENT #9 (EXTRA)ZENER DIODE & INTEGRATOR • Functions like a normal diode, but use is different. • Once current is passed in the opposite direction, the diode will fail, and keep the breakdown voltage constant. • The breakdown voltage can then be utilized in feedback control. Zener Diode + Integrator

  14. LET’S PUT IT ALL TOGETHER

  15. ACKNOWLEDGEMENTS Very, very special thank you to ShriramShivaraman and Alyosha Molnar. We couldn’t have completed our project without you two!

  16. REFERENCES • Brain, M. (n.d.). HowStuffWorks "How Inductors Work". HowStuffWorks - Learn How Everything Works!. Retrieved July 23, 2010, from http://www.howstuffworks.com/ • “Simple MOSFET switch design”. Electronic Circuits Projects Diagrams Free. Retrieved July 23, 2010, from http://www.electro-tech-online.com/general-electronics-chat/12910-simple-mosfet-switch-design.html • Op Amp Triangle-Wave Generator. (n.d.). eCircuit Center. Retrieved July 24, 2010, from http://www.ecircuitcenter.com/Circuits/op_tri_gen/op_tri_gen.htm

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