how to bench test a dynamo

Discussion in 'How To' started by matty, Aug 28, 2011.

  1. matty

    matty Supporter

    You can use a drill to check the maximum voltage of the generator
    • Use a jumper lead to connect DF to the generator frame (grounding the DF connection).
      • With the drill running test the voltage between D+ and the generator frame.

        The voltage should increase with rpm up to about 35 volts (20 volts or so for the 6-volt generator).
      If the generator passes this test, it's working okay.
    DON'T run this test any more than a few seconds -- just enough to make the test at increasing rpm, as this test will heat up the generator.If the above test fails, it may be caused by the generator becoming depolarised (not enough magnetism to start the generating process).To polarise the generator, jumper wire from DF to the generator case (grounding the DF terminal). Now connect a wire from the + terminal on the battery to D+ on the generator. The generator should now start to spin. A few seconds is enough for this test.If the generator doesn't spin, it's faulty. It's rebuild time
     
  2. 8) can you rebuild them matty
     
  3. matty

    matty Supporter

    I cant not much call with alternators replacing them if the windings have gone its cheaper to get a new one but the brushes are easy enough to do yourselves

    Frome auto electrics might be able to.
     
  4. I cant not much call with alternators replacing them

    :arrggh: i got three cant work out if any are anygood
     

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