1. P16228 Magnetically Levitated Propeller
Joseph Bernardini Bernie Garcia Cheng Lin
Zachary Louison Michael Purcell Elijah Sensenig

2. Project Review Agenda Project Overview
Customer Needs and Project Specifications
System Design
Concept Summary
Design Summary
System Testing Results
Objective Project Evaluation
Sustaining Project Gains

3. High Priority Customer Needs

4. Engineering Specifications

5. Design Concept

6. Systems Design

7. Systems Design

8. BOM Budget: $4,000 Total Funds Spent: $2,389.20 Zach - Reimbursement
≈$100
Magnets, PVC, Screws/Hardware

9. Levitation Implementation Visible Problems
Permanent magnetic bearings (passive)
Electromagnets (active)
Feedback control via proximity sensors – Hall Effect
Visible Problems
Complexity of active control
Magnetic bearing instability
Interference between neighboring magnets
Interference with motor magnets

10. Levitation (Bearing)
Levi

11. Levitation (Sensors/Solenoids)

12. Rotation (Motor) Implementation Visible Problems
Applimotion three-phase brushless DC motor
Arduino Mega microcontroller
Castle Creations Phoenix Edge 50
Visible Problems
Lack of motor controller familiarity
Lack of Arduino code familiarity
Motor controller not ideal for chosen motor
Discontinuous rotation due to use of servo code
Levi

13. Rotation (Motor)
Arduino code: Program ESC to control Motor
Levi

14. Propulsion (Propeller)
Implementation
Created a 3D printed model of the propeller
2 printed models (1 faulty)
Visible Problems
Wasn’t implemented into the prototype design
Propulsion wasn’t produced
Levi

15. Electrical System Testing Results
3 Solenoid Controller Boards
All functioned as designed
Using an input frequency up to 250 Hz
3 Hall Effect Sensor Boards
After minor tweaking, all functioned as designed
5 solenoids
The inductance of each was measured and compared to the calculated value
3.15 mH, mH, 2.54 mH, 1.47 mH and 2.03 mH
Motor
Inputs were sent to the motor from the Arduino via the motor controller
Full testing was not complete due to issues with programming

16. Objective Project Evaluation
Joe 16

17. Initial Requirements

18. Overall Performance/Accomplishments
A working prototype of the motor
○ the purchased motor was mounted on a mechanical ball bearing and shaft. It was run using an Arduino software loop via the Mega 2650 and Edge 50 microcontroller
○ we were unable to achieve continuous rotation due to discrepancies between the motor controller and Arduino code
Hall Effect sensor operation
○ proper sensor board operation was verified by placing a magnet near each of the sensors and measuring an output signal
Solenoid operation
○ proper solenoid board and solenoid operation was verified by sending a PWM signal the board input and observing the now-magnetized solenoids
Sensor-to-solenoid control
○ a preliminary Arduino program was implemented to connect the Hall Effect sensors to the solenoids. Bringing a magnet close to the sensor would immediately turn on the solenoid. Taking the magnet away would then turn it off
Passive magnet bearing prototype
○ a magnetic bearing was printed and tested with our levitation concept. We discovered the relationship between longer and shorter arc magnets that should enable quasi-stable levitation using a more precise and balanced bearing model

19. Semester Plan

20. Update Semester Plan

21. Moving Forward... Ensure customer has all project hardware and code
Clear out lab and locker and put everything in Dr. Day’s lab
Code has been moved to a dedicated hand-off folder
Ensure customer has all relevant documentation
Documentation has been moved to a dedicated hand-off folder (an will be sent)
Offer suggestions for project continuation
Print out revised propeller and bearing; rebuild passive levitation prototype to verify theory

22. What we learned Working in groups can be complicated
Expect setbacks and complications
Backup plans should be created due to the possibility of these situations
Working together provides better results
Listen to the advice of your guide
The entire team has to be on the same page and we work very well with one another
MSD can be very stressful

23. Questions or comments?