Electric Excursion Semester I

1. Electric Excursion
Nick DePaolis & Keith Garcia
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2. Agenda
• Background
• Project Goals/Detail Specifications
• Open AIs
• Project Status:
• Schedule (Milestone Chart)
• Work Plan/Tasks
• Task Details
• Budget
• Summary 2

3. Background
• The use of small-scale transport is increasing
• Scooters, skateboards and bicycles
• Increase usability, consistency and efficiency
• Implement electric assistive design
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4. Goals/Detailed Specifications
Goal(s):
• Design under-bodied propellant device to
electrically drive the board
• Implement some form of speed control
• Incorporate some form(s) of safety features
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5. Goals/Detailed Specifications
Specifications/Goals:
• Top speed of 12-20 mph & safe for beginners
• Design for hill gradient max 10%
• Effective range ~10-15 miles
• Recharge time < ~5 hours
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6. Design Specifications
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Parameter Requirement Actual
Performance
Verification
Top Speed 12 Mph TBD Test
Battery Size 170 Watt-hour TBD Inspection
Effective Range 10 Miles TBD Test
Recharge Time < ~5 Hours TBD Test
Ability to Climb
(Hill Gradient)
10% TBD Test
Max Load 160 Pounds TBD Analysis

7. Project Status:
• AIs Open:
• Obtain batteries
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8. Work Plan:
Task 1: Competition research of electric skateboards
Task 2: Component Identification
Task 3: Controller Communication Methodology
Task 4: Comparing Battery Types
Task 5: Identify Minimum Power Requirements
Task 6: Preliminary Design
Task 7: Evaluation of Proposed Solutions and Selection
Task 8: System Integration and Testing
Task 9: Safety Research
Task 10: Documentation 8

9. Schedule: Semester 1
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100
100
100
90
100
100
100
80
100
100
50
NS
NS
NS
Key: NS : Not Started
90
100
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10. Schedule: Semester 2
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11. Task 1: Research
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• Drivetrain components
• Top speed
• Electric Motor
• Range
• Battery size
• Weight capacity
• Cost

12. Task 1: Summary
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• Drivetrain components
• Top speed
• Electric Motor
• Range
• Battery size
• Weight capacity
• Cost

13. Task 1: Drivetrain Components
• Motor pulley
• Wheel pulley
• Drive belt
• Wheel Bracket
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https://electric-skateboard.builders/t/beginners-guide-to-building-your-own-electric-skateboard-drivetrain/53
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2
3
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14. Task 1: Drivetrain Components
• C = 2*3.14*r : Distance per revolution
• C = 2𝜋𝑟 = 2𝜋 45𝑚𝑚
• C = 282.743mm = 28.27cm
• 60mm - 70mm Center distance for mounting
(ex. on next slide)
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https://www.warehouseskateboards.com/help/Longboard-Skateboard-Wheels-Buying-Guide

15. Task 1: Drivetrain Components
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https://electric-skateboard.builders/t/beginners-guide-to-building-your-own-electric-skateboard-drivetrain/53

16. Task 1: Drivetrain Components
• Smaller wheel diameter
– More torque
– Lower top speed
• Large wheel diameter
– Higher top speed
– Lower torque
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17. Task 1: Electric Motor(s)
Brushed
• Simplified wiring
• Low cost
• Lower efficiency
• Electrically noisy
• Shorter lifespan
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Brushless
• Low maintenance
• High cost
• High efficiency
• Long lifespan
• Controller required

18. Task 1: Electric Motor(s)
Specifications:
• Max power: 2450W
• Max current: 65A
• Max torque: 7 Nm
• Motor Res.: 0.053Ω
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19. Task 1: Range
• TCNJ Campus 289 acres
• Goal range 15 miles
• Estimated to be ~2 mi
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20. Task 1: Range
• Closer Estimate from Google Maps
• Around 1.74 mi
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21. Task 2a: Component Identification
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• Basic
• Bearings
• Deck Material/Design
• Grip Tape
• Trucks
• Wheels

22. Task 2b: Component Identification
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• Electric
• Battery
• ESC (Electronic Speed Controller)
• Remote Control Device
• Motor
• Wireless Transmitter / Receiver (2.4GHz)

23. Task 2c: Component Identification
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• Mechanical
• Drive Train
• Belt
• HUB
• Direct
• Braking Mechanism

24. Task 2c: Belt Drive
Pros:
• Faster motors
• Wide wheel variety
• Changeable gearing
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Cons:
• Exposed belt
• Exposed teeth
• Debris damage

25. Task 2c: HUB Drive
Pros:
• Low maintenance
• Replace tire sleeves
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Cons:
• Stiff riding
• Excess heat
• HUB replacement
• Thin wheels

26. Task 2c: Direct Drive
Pros:
• Heat dissipation
• Wide wheel variety
• Self contained
• Open wheel sizing
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Cons:
• Less protected
• Uneven surfaces
problematic
• Low underbody
clearance

27. Task 3: Handheld Controller
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• Low-power connection
• Bluetooth Low Energy
• Wireless(2.4G)
• Cellular

28. Task 3:Electronic Speed Controller
Specifications: FSESC 4.12 Module
• 50A continuous
• 240A instantaneous
• 8V – 60V
• BEC 5V at 1.5A
• VESC compatible 28

29. Task 4: Compare Battery Types
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Li-ion (Lithium-Ion)
• Very common ($)
• Cheaper than LiPo Batteries
• Longer life cycle
• Experience voltage sag
• Relatively Cheap ($$)
• Less Susceptible to voltage sag
• Polymer electrolyte v.s liquid
electrolyte
• Useful when weight is important
• Susceptible to vaporization of
electrolyte
LiPo (Lithium-Ion Polymer)

30. Task 5: Power Consumption
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• Determine voltage and current requirements
• Motor
• Controller
• Peripherals
• Wheel size and deck material
• Consumption as a function of size

31. Task 6a: Preliminary Designs
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32. Task 6b: Preliminary Designs
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33. Task 6c: Preliminary Designs
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• https://wowgoboard.com/products/remote-for-wowgo-2s
• https://www.istockphoto.com/vector/skateboarding-icon-on-black-and-white-
vector-backgrounds-gm690761290-127322871
ESC

34. Task 6b: Preliminary Designs
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35. Task 6b: Preliminary Designs
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36. Task 6b: Preliminary Designs
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37. Task 6b: Preliminary Designs
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38. Task 6b: Preliminary Designs
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39. Task 6b: Preliminary Designs
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40. Task 6b: Preliminary Designs
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41. Task 6b: Preliminary Designs
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42. Task 6b: Preliminary Designs
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43. Task 7: Evaluate and Choose Solution
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• In progress ~95% Complete

44. Task 8: System Integration/Testing
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• In progress ~25% Complete
• Controller and Motor integration
• Testing actual power requirements
• Utilization of on-board sensors
• Power Switch and Charger integration

45. Task 9: Safety Research
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• Personal protective equipment
• Acceleration adjustment
• Remote control grip safety
• Speed reduction
• Limit switch application

46. Task 9: Summary
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• PPE: helmet, knee, wrist and elbow pads
• Button to implement a grip safety in remote
control
• Braking applied to motor through Electronic
speed controller

47. Task 9a: Switch
• Switch to be used with continuous loop
• Maintaining a set condition within defined
parameters (sending data to ESC)
• Switch open and closed will determine
condition
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48. Task 10: Documentation
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• Electric Excursion Design Review 1
• Electric Excursion Design Review 2
• Electric Excursion Design Review 3
• Electric Excursion Final Design Review

49. Monetary Budget
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50. Monetary Budget
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51. Monetary Budget
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52. Labor Budget
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53. Conclusion/Summary
• 100% of the parts are selected
• 100% of parts ordered
• Finished analysis of safety measures
• Budget and Milestone Charts are updated
• Our team is making good overall progress
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54. Questions?
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