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ECE 496 DC Motor Design Group A

ECE 496 DC Motor Design Group A . December 01, 2003. Mark Goettsch. Introduction. Project Objectives Team Construction Controls Results Web Development Conclusions Questions. Objectives.

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ECE 496 DC Motor Design Group A

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  1. ECE 496 DC Motor Design Group A December 01, 2003 Mark Goettsch

  2. Introduction • Project Objectives • Team • Construction • Controls • Results • Web Development • Conclusions • Questions

  3. Objectives • Each group must design, construct, and control a DC homemade motor, commutation system, control system, and a speed measurement device such that the machine assembly rotates at selected speeds. • Build a motor capable of turning 100-900 rpm • Control the motor within 10 rpm

  4. Team Structure

  5. Construction • Armature • Shaft and Insulation • Windings • Stator and Magnets • Baseplate, Bearings and Supports • Encoder Mounting • Problems

  6. Armature Plates • 3/16” thick steel plates • 2.5” diameter • 17 total for approximately 3” • 8 slots, ½” diameter

  7. Shaft Steel 5/8” Diameter 20” Long 4” cut down to 3/8” diameter to fit encoder Insulation Polyurethane spray from Lowe’s 4 or 5 coats Insulation Paper Shaft and Insulation

  8. Stator • 4” steel pipe • 3.625” diameter • Adjustable air gap

  9. Magnets • 2 Pole • ¼” thick • Arc shaped • 1.875 long • 12 total • 60 degrees of separation between magnet pairs

  10. Bearings and Support • Steel baseplate and support plates • Steel encoder plate • Pillow block bearings5/8” diameter

  11. Commutator Brushes • Helwig Carbon Brushes • Concave Radius • 0.375x0.750x1.000 • Copper over PVC • 1.5” Long • 8 segments

  12. Construction Problems • Machining time • Adjustable air gap • Securing magnets

  13. Controls

  14. Approach • Focus on Steady-State Response • Simplicity • QNIX and QMotor

  15. Encoder • US DigitalE3-1000-375-IHM-PKG3 • Optical Encoder • 1000 CPR

  16. Wiring

  17. Control Problems • Working Computer • Learning QNIX and QMotor • Program quitting prematurely

  18. Bonus Day Mounted Motor Unable to Spin 6 Points Competition Day 300-500 rpm range ±2 rpm for 320, 400 and 480 30/30 points for steady-state No points awarded for transient Results

  19. Web Development

  20. US Digital Corporation11100 NE 34th CircleVancouver, WA 98682 USAhttp://www.usdigital.com/ Electric Motor and Drives2417 Hwy.29 N.Anderson, SC 29621http://www.emd-inc.com Owens Corning412 W Whitner StreetAnderson, SCwww.owenscorning.com/ Oconee Machine and Tool2319 Sandifer Blvd.Westminster, SC 29693 Acknowledgements

  21. Conclusions • What we learned • Questions • Mark GoettschGroup A

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