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Electric motor


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Electric motor

  1. 1. Making an Electric Motor 9th Annual Day of the Teacher Conference March 26, 2011 CSUEB Concord Campus Charles Reynes Elementary Science Specialist Castro Valley, USD
  2. 2. Making an Electric Motor <ul><li>36-40 inches of 20 gauge enameled speaker wire. </li></ul><ul><li>1 magnet </li></ul><ul><li>2 paper clips </li></ul><ul><li>1 AA battery </li></ul><ul><li>1 Crayola marker </li></ul><ul><li>scissors </li></ul>
  3. 3. Making an Electric Motor <ul><li>Unbend the paperclips. </li></ul><ul><li>Fold the smaller end back on itself as shown. </li></ul>
  4. 4. Making an Electric Motor <ul><li>Coil the wire 12-16 times around the end of the marker. </li></ul><ul><li>Leave about 3-4 inches at each end. </li></ul>
  5. 5. Making an Electric Motor <ul><li>Carefully slide the coil off the marker. Be sure it doesn’t uncoil. </li></ul><ul><li>Crayola markers are tapered so it is easiest to slide the coil toward the cap. </li></ul>
  6. 6. Making an Electric Motor <ul><li>Use each end of the wire to bind the coils together. </li></ul><ul><li>It is important to create a balanced and symmetrical rotor. </li></ul>
  7. 7. Making an Electric Motor <ul><li>The commutator is created by scraping half the insulation off both ends of the wire. </li></ul>Strip insulation from bottom side of each wire.
  8. 8. Making an Electric Motor <ul><li>Place the magnet on the battery and hold the paperclips in place. </li></ul><ul><li>Place the rotor in the paper clip cradle and give it a little push. </li></ul>