Presents the ‘Easy-Bike’ Trevor Hennigar Hector MacQuarrie Paul Thompson David Smith (Absent)...
26
Presents the ‘Easy-Bike’ Trevor Hennigar Hector MacQuarrie Paul Thompson David Smith (Absent) Supervisor: Peter Allen
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Transcript of Presents the ‘Easy-Bike’ Trevor Hennigar Hector MacQuarrie Paul Thompson David Smith (Absent)...
Presents the ‘Easy-Bike’
Trevor Hennigar Hector MacQuarrie
Paul Thompson David Smith (Absent)
Supervisor: Peter Allen
Background Information
3
Problem to Be Solved
Difficult to traverse steep hills in Halifax on a bicycleInability to store energy while stopped temporarily in city traffic or on a ferryLack of storage space for a bicycle and an exercise bike in small dwellings
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Design Requirements
5
Design Requirements
1. Combination of motors, generators and batteries
2. Capable of regenerative braking3. Ability to be pedaled while at a standstill
in order to further charge batteries4. Ability to be charged using a standard
household power supply5. Minimum range of 10km6. Maximum weight of 90 lbs7. Maximum cost of $2750
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Calculations
7
Power Requirment
Maximum Power Calculation:
θ = 8.5° (Prince Street)
V = 1.67 m/s (6km/h) (Minimum speed can travel with stability)
n = 5% (Chain + Bearings + Safety Factor)
P = 340.7 Watts (Power required for motor to deliver)
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
8
Energy Storage
P Hill = 340.7 W , t = 4.0 min P flat = 64.5 W , t = 28.9 minη=25% (Motor + Battery + Controller + I2R Losses)
E = 71.5 Wh
Electric Charge = Energy/Voltage[Ah] = [Wh]/[V]
Electric Charge = 71.5Wh/36V = 2.0 Ah
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Design
10
Number of Wheels
Criteria 3 Wheeled 2 WheeledEase of Operation XSimplicity of Design XCost XWeight XManeuverability XAdaptability to Existing Bicycles X
Equipment Mounting X
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
11
Drive SystemAll Electric Drive
Uses a Battery, Brushless DC Generator, and Brushless DC MotorNo mechanical connection to the rear wheel
Generator
Battery
BrushlessDC Motor
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
12
Drive SystemElectric/Chain Drive
Uses a standard bicycle drive train and a second chain drive for the generatorGenerator chain will be attached to the non-drive side of the bottom bracket
Generator
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Battery
BrushlessDC Motor
13
Drive SystemNeutral Gear
Allows user to switch the easy bike into generation modeNylon material with low coefficient of frictionReplaces top two sprockets on rear cassetteDimensions must be optimized for gear shifting performance
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
14
Drive SystemCriteria Electric
DriveElectric/
Mechanical DriveEase of Operation XSimplicity of Design X
Cost XWeight XEfficiency XAdaptability to Existing Bicycles X
Reliability X
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
15
Battery3 Types
Lithium-Ion, Lead Acid, Ni-CADBackground Information
Design Requirements
Calculations
Design
Budget
Future
Conclusionhttp://www.mpoweruk.com/chemistries.htm
16
KickstandCenter Mounted
Motorcycle style center stand
Rear MountedCan be retracted into a latch mechanism on the rackOut of the way while in the latched positionMock-Up tested for stability
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
17
KickStand
INSERT sOLID WORKS MODEL
Criteria Center Mounted
Rear Mounted
Stability XEase of Operation XSimplicity of Design XCost XWeight XStrength XAdaptability XInterference with Pedals and Steering
X
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
18
Other ItemsBackground Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Budget
Item Details Item CostNumber of
Item Total Cost
Bicycle
Bicycle Frame, Gearset, and Wheels (Kijiji) $ 200.00 1 $ 200.00
Rack Norco Axiom (JensonUSA) $ 61.48 1 $ 61.48
Motor
Electric Hub Motor & Throttle Crystalyte 406, 26" 36V Front Wheel (ebikes) $ 315.00 1 $ 315.00
Controller 100A - 36V Brushless w/ Regen (Kelly) $ 269.37 1 $ 269.37
Battery 36V 12Ah Nexcell NiMH (ebikes) $ 505.00 1 $ 505.00
Generator
Generator 180W 24V BLDC (AnaheimAutomation) $ 118.45 1 $ 118.45
Controller DC 20-50V (AnaheimAutomation) $ 177.12 1 $ 177.12
Sprocket, Crankset & Chain Guard Shimano Alivio (JensonUSA) $ 113.52 1 $ 113.52
Free Spinning Disc Nylon (K-Mac-Plastics) $ 44.98 1 $ 44.98
Kickstand
Rachet & Pawl (McMaster Carr) $ 98.40 2 $ 196.80
Pulley & Cable (McMaster Carr) $ 157.35 1 $ 157.35
Axle, Bearings & Spacer (JensonUSA) $ 52.37 1 $ 52.37
Brake Lever (JensonUSA) $ 13.53 1 $ 13.53
Materials
Aluminum Sheet 2'x1'x3/8" (Metals Depot) $ 55.24 1 $ 55.24
Aluminum Block 1.75"x1.75"x6" (Metals Depot) $ 17.60 1 $ 17.60
Square Aluminum Tube 3/4"x3/4"x6' (Metals Depot) $ 13.36 1 $ 13.36
Nuts & Bolts 9/16" (Various) $ 0.50 10 $ 5.00
Miscellaneous
Battery Charger 36V 3A NiMH Battery Charger (ebikes) $ 80.00 1 $ 80.00
Total w/10% Contingency = $3227.04
BudgetBackground Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Future Work
Gantt Chart
FIX TIMELINE!!!!!!!
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Conclusions
Work Completed
Design achieved which satisfies all design requirementsChassis Design/LayoutEnergy Calculations completed
Generator SizingMotor SizingBattery Sizing
Mock-Up Kickstand completedSolidWorks model completed81% of proposed budget was approved
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Work Left to DoBudget
Cut costs by:$477.00 to meet design requirements$827.00 to meet funding allotment
MechanicalFinalize profile of nylon cog through trial testingComplete detailed stress calculations to confirm initial stress estimates
ElectricalFinalize the specifications for the generatorFinalize parameters needed to program the controller Determine the possibility of using the one controller for the motor and generator
Background Information
Design Requirements
Calculations
Design
Budget
Future
Conclusion
Acknowledgements
Peter Allen – Supervisor
Shell – Sponsor
Mechanical Engineering Faculty - Support
