How to Use an Alternator to Make Electricity

An alternator uses a rotating magnetic field to turn kinetic energy into electrical power. A functional, used alternator from a car can be used with a small engine and AC-DC converter to provide power. For an alternator to work properly, the magnetic field must rotate at a very fast speed, which is why alternators need to be connected to a quickly rotating engine rather than a wind turbine or water wheel. An engine that runs at least 2,100 rpm or greater is best for solid results.

Instructions

1. •  1.Place the alternator on the corner of a full sheet of 3/4-inch plywood so that the pulley hangs over the edge of the sheet. Mark the mounting bolt holes with a marker.2.Remove the alternator and drill holes through the marks with a drill. Return the alternator to the board and slide lag bolts through the mounting holes. Place a washer on the bottom and thread a nut onto the bolt by hand as far as possible. Hold the nut in place with a crescent wrench and tighten it with a socket wrench.
     
     
     
   • 3.Set a small gas-powered engine with a mounted pulley parallel to the alternator. Wrap the alternator belt around the engine pulley and the alternator pulley. Pull the engine away from the alternator until the belt is tight.4.Line the pulleys up so that they are exactly parallel. Move the belt by hand to make sure there isn't any wobble in the movement. Mark the engine mounting holes with a marker, then slide the engine out of the way and drill the holes with a drill.5.Slide the engine back in place with the belt still on. Drop lag bolts into the mounting holes. Fit washers and nuts on the back of the bolts and tighten them down with a socket wrench.6.Attach an AC-DC converter to the alternator. Tighten the retaining nuts by hand until they're snug.7.Turn the engine on. Plug an appliance or battery into the AC-DC converter.