Solar Cars

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Solar Cars

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<ul><li><p>SOLAR CARSPresented by: </p></li><li><p>AN OVERVIEWPowered by suns energySolar array collect the energy from the sun and converts it into usable electrical energyPower trackers convert it into the required voltage Motor controller sends power to the motorDivided into five Driver Controls &amp; Mechanical Systems Electrical System Drive Train Solar Array Body and Chassis</p></li><li><p>Borealis III Raycing with the Sun - Photo by Colin Burnett</p></li><li><p>DRIVER CONTROLS &amp; MECHANICAL SYSTEMSStandard featuresSteeringPrecise steering alignment SUNRUNNER utilized a rack and pinion system that was attached to the steering arms by means of tie rods BrakeDesigned to move freely by eliminating brake drag Hydraulic disc brakes Regenerative braking </p></li><li><p> Suspensionfront suspension- MacPhearson struts or double A arms MacPhearson strut requires a large vertical clearance Double A arms require less vertical clearance, but consist of more componentsrear suspension is a trailing arm, similar to that in motor cyclesWheelsrolling resistance three or four wheelswheel designs are similar to those of bicycle tires </p></li><li><p>ELECTRICAL SYSTEMMade up of batteries and power electronicsBatteriesLead-Acid Nickel-Metal Hydride (NiMH) Nickel-Cadmium (NiCad) Lithium IonTesseract uses 512 li-ion batteries </p></li><li><p> Energy Flow Diagram of a Solar Car </p></li><li><p> Peak Power Trackersmaximize the power protect the batteries from being damaged by overchargingefficiencies above 95%</p><p>Motor Controllers decides how much current actually reaches the motorup to 90% efficient </p></li><li><p>DRIVE TRAINConsist of the electric motor and the means to by which the motor's power is transmitted the wheelpower generated is less than 5 hponly one wheel in the rear of the car is driven by the electric motormotor typesbrushed DC dual winding DC brushless induction </p></li><li><p>Dual-winding DC brushlessused as an electronic transmission Types of transmissionsvariable ratio belt drive hub motor </p></li><li><p>SOLAR ARRAYmade from silicon, by joining an n-type and a p-type semiconductorgrouped into space grade and terrestrial grade categories Encapsulation ArraySUNRUNNER'S array consisted of 14,057 razor-blade sized, 16% efficient space grade cells.</p></li><li><p>Solar array</p></li><li><p>LIMITATIONS Only 1000 W/m2 of energy reaches the earths surface in an hour of peak sunaverage solar array configuration spans 8m total amount of energy hitting the solar car during peak sun is 8KWh/m average solar cells are only able to convert 12% to 18% to electricity the total amount of converted energy available to a car consists of 700-1500 Watts three primary areas of energy loss consist of aerodynamic drag, braking, and rolling resistance </p></li><li><p>BODY &amp; CHASSIS goals minimize the aerodynamic drag maximize the exposure to solar insolation minimize weightmaximize safety </p></li><li><p>Body Shapes</p><p>Unified aero body and panel Fixed or tilting, flat panels with a separate driver cab Catamaran shapeuniquely designed shape MAIZE &amp; BLUE and SUNRUNNER are catamaran shaped.</p></li><li><p>Chassis space framewelded tube structure to support the loads and the body body is a lightweight, non-load bearing, composite shell Semi - monocoque or carbon beam composite beams and bulkheads to support the loads integrated into a non-load bearing composite belly pan monocoque uses the body structure to support the loads </p></li><li><p>MATERIALS USEDcomposite materialcombination of a filler material sandwiched between layers of a structural material structural materialsCarbon fibre, Kevlar and fibre glass filler materials Honeycomb and foam bonded together using epoxy resins</p></li><li><p>FALLING SHORTcharacteristics that a commercially viable car extremely reliable comfortablebe able to function on its ownmaintain the required speedamenities such as air conditioning, radio, and power locks and windows Solar carsLimited seating capacityFrequent flat tyresOften was incapable of maintaining highway speeds</p></li><li><p>THE FUTUREIN THE SHORT TERMterrestrial application of the rovers that NASA uses in space Data collection in a hot, sun rich area Carry-over of expertise substantial advances to the design of electric vehiclesbetter motors, better use of batteries, and better motor controller designcomposite hull car spread the word about the use of harnessing solar power </p></li><li><p>IN THE LONG RUNElectric carIncrease in petroleum pricesshort distance commutation improvements</p></li><li><p>THANK YOU </p></li></ul>

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