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

Introduction Project Objectives Team Construction Controls Results Web Development Conclusions Questions

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 rpm Control the motor within 10 rpm

Team Structure Mark Goettsch Group Leader Control Group Shawn Peterkin Misty Maddox Brad Peterson Construction Group Mark Goettsch Jason Varner

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

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

Shaft and Insulation 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

Stator 4” steel pipe 3.625” diameter Adjustable air gap

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

Bearings and Support Steel baseplate and support plates Steel encoder plate Pillow block bearings 5/8” diameter

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

Construction Problems Machining time Adjustable air gap Securing magnets

Controls

Approach Focus on Steady-State Response Simplicity QNIX and QMotor

Encoder US Digital E IHM-PKG3 E IHM-PKG3 Optical Encoder 1000 CPR

Wiring

Control Problems Working Computer Learning QNIX and QMotor Program quitting prematurely

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

Web Development

Acknowledgements US Digital Corporation NE 34th Circle Vancouver, WA USA Electric Motor and Drives 2417 Hwy.29 N. Anderson, SC Owens Corning 412 W Whitner Street Anderson, SC Oconee Machine and Tool 2319 Sandifer Blvd. Westminster, SC 29693

Conclusions What we learned Questions Mark Goettsch Group A