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MAGLEV

MAGLEV. Critical Design Review Group 2 Julio Arias Sean Mawn William Schiller Leo Sell. Motivation. Increase awareness of related technology Clean technology. Specifications. Goals and Objectives.

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MAGLEV

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  1. MAGLEV Critical Design Review Group 2 Julio Arias Sean Mawn William Schiller Leo Sell

  2. Motivation • Increase awareness of related technology • Clean technology

  3. Specifications

  4. Goals and Objectives • Main goal is to replicate an existing technology that uses magnetic fields as a sole method of propulsion and levitation • Three objectives • Magnetic levitation • Magnetic propulsion • Wirelessly controlled

  5. Levitation • Passive design • Opposing polarity rails to minimize motor gap magnetic field interference. • Levitation achieved through like-pole repulsion

  6. Levitation

  7. Repelling Force Test: Car and Track

  8. Propulsion • Using alternating polarity magnets on each rail, the solenoids will achieve a push pull force to create movement

  9. Propulsion – The Halbach Array • The proper propulsion technique is achieved using a Halbach Array. For the array we used N48 grade cylindrical Neodymium magnets

  10. Halbach Array cont. • Field on the other side of the Halbach field is reduced to near zero • By directing the field towards the motor gap in the track, the solenoid motor is saturated by the drive magnet field

  11. Vehicle

  12. Electromagnets

  13. Hardware Block Diagram Solenoids ATmega328 H-Bridge IC’s 18V source Hall Effect Sensors Android App 9V Battery 5 Volt regulator Bluetooth

  14. MCU • Atmega328P • Sensors use 3 analog inputs (6 analog inputs total) • H-Bridge’s use 6 Digital I/O’s (14 total, 2 reserved for Bluetooth connection) • 16 MHz crystal • Programmed through an Arduino Uno development board

  15. H-Bridge IC Usage • TI SN754410 • 4.5V – 36V operating range • 1A output-current per driver • Operating Temp, -40 to 85⁰C • 3 state outputs • Cost: $2.35 ea

  16. Hall-Effect Sensors

  17. MagLev Schematic

  18. Eagle PCB board vs. DOT PCB

  19. Three - Phase Drive system • Sensor orientation sends a three phase voltage signal back to MCU • 120 degrees apart based on the position of the sensors on vehicle • Each phase represents one sensor coupled with a solenoid • Sensor output voltage ranges depict solenoid polarity

  20. Controlling the System

  21. Controlling the System

  22. Android vs. IPhone

  23. User Interface

  24. App Class Diagram

  25. Bluetooth Slave Module RN-42

  26. Bluetooth Slave Module HC-06

  27. Communication Through System

  28. MCU Movement Control Receive direction Signal Receive Hall Effect Readings Control logic determines electromagnet outputs MCU changes H-Bridge logic H-Bridge controls electromagnet

  29. Microcontroller Signals

  30. Input Output expectation

  31. MCU HES Logic

  32. Allegro A1301 and Solenoid Combination South No-Field North Gauss>220 -220<Gauss<220 Gauss<-220

  33. MCU Electromagnet

  34. Braking and Magnet count Brake Forward Hold

  35. Administrative Content

  36. Project Progress

  37. Budget and Financing

  38. Work Distribution

  39. Issues • The originally planned circular track design was not feasible due to budget and costs • Manual variable speed wasn’t implemented due to final track length • Working with magnets presented magnetic interference issue in testing affecting circuit, power, and Bluetooth Module Connection • Stability problems throughout designing and testing

  40. Questions

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