optimization of a 1974 vw electric bug
DESCRIPTION
Optimization of a 1974 VW Electric Bug. Michael Boyle Michael LaBeach Andrew Magaletti Rabei Rabei. Project. Problems Hills Speed Range Lights Interior. Project Specifications. Increase Torque Increase Speed Increase Range Distribute Weight. Design Concept. Battery Cage - PowerPoint PPT PresentationTRANSCRIPT
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Optimization of a 1974 VW Optimization of a 1974 VW Electric BugElectric Bug
Michael BoyleMichael BoyleMichael LaBeachMichael LaBeachAndrew MagalettiAndrew Magaletti
Rabei RabeiRabei Rabei
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ProjectProject
ProblemsProblemsHillsHillsSpeedSpeedRangeRangeLightsLights InteriorInterior
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Project SpecificationsProject Specifications Increase TorqueIncrease Torque Increase SpeedIncrease Speed Increase RangeIncrease RangeDistribute WeightDistribute Weight
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Design ConceptDesign Concept Battery CageBattery Cage 24V Field Charge24V Field Charge Battery ConfigurationBattery Configuration Rejuvenated BatteriesRejuvenated Batteries Heat Sinks on Heat Sinks on
ControllerController Air Induction for MotorAir Induction for Motor Hydrogen VentilationHydrogen Ventilation
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Battery CageBattery Cage DesignDesign
Material Material CostCost Efficiency Efficiency
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Battery Cage AnalysisBattery Cage Analysis
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Battery Cage Stress AnalysisBattery Cage Stress Analysis
Stress AnalysisStress Analysis Displacement AnalysisDisplacement Analysis
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Battery ConfigurationBattery ConfigurationAddition of 6 Addition of 6
batteriesbatteries Increases rangeIncreases rangeSeries/ParallelSeries/Parallel
Field Voltage PackField Voltage Pack Increases speedIncreases speed Increases torqueIncreases torque
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Range - CalculationsRange - CalculationsRange Calculations
RangeEnergybattery
Energyused
mile
I1 260A hr 20 Ah capacity x 2 for parallel configuration
Cf .57 Conversion factor from Trojan website
Vpack 72V
Ebatt Vpack Cf I1 Eused 200W hr
mi
RangeEbattEused
Range 53.352mile
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Speed - CalculationsSpeed - CalculationsActual Top Speed
Factoring rolling friction give us a better estimate of the top speed.
P12
air Vc3
Af Cd Vc Fr
Fr r Wcar Fr 125.92N
Vc 60mph 61mph 75mph
Ptest Vc 12
air Vc3
Af Cd Vc Fr
Ptest 70.14mph( ) 15kW
Varying the V value in the above equation, a top speed of70.14 mph can be reached with a 15kW motor.
Power vs. Velocity
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
55 60 65 70 75 80
Velocity (mph)
Pow
er (k
W)
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Battery RejuvenationBattery Rejuvenation Rob MatthiesRob Matthies ProcessProcess
Analyze BatteryAnalyze Battery Recondition BatteryRecondition Battery
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Rejuvenation ProcessRejuvenation ProcessAnalyze BatteryAnalyze Battery
Determine discharge rateDetermine discharge rateNatural voltageNatural voltage
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Rejuvenation ProcessRejuvenation ProcessRecondition BatteryRecondition Battery
Use a battery reconditionerUse a battery reconditionerShake batteryShake batteryCharge, Discharge and RepeatCharge, Discharge and RepeatGood BatteryGood Battery
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Heat SinkHeat Sink Regulating Regulating
Controller Controller TemperatureTemperature
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Motor Air InductionMotor Air InductionKeep motor cool Keep motor cool
at 96Vat 96VSize of fanSize of fan
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Hydrogen VentilationHydrogen Ventilation Fan Size Fan Size Fan MountingFan Mounting
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Cost AnalysisCost Analysis
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Conversion ManualConversion Manual
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ConclusionConclusionSpecifications metSpecifications metUnder BudgetUnder Budget
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Future PlansFuture Plans Battery revivalBattery revival
Shaker TableShaker Table Order PartsOrder Parts Heat Transfer AnalysisHeat Transfer Analysis Finalize Cage DesignFinalize Cage Design
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ReferencesReferences Brant, Bob. Build Your Own Electric Vehicle. TBA Books, Blue
Ridge Summit, PA. 1994 “Evalbum”, (11/6/08), www.evalbum.com Barkley, Michael.(9/10/08) “Mitsubishi Eclipse Conversion”,
(TexomaEV.com) http://www.texomaev.com/ (Accessed: 9/26/08)
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AcknowledgementsAcknowledgementsRob MatthiesRob MatthiesDr. HollisDr. HollisAndrew ParkAndrew ParkMichael BarkleyMichael BarkleyDr. ClarkDr. Clark