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Choice of Alternator or Generator?

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Posted by Bob on November 22, 2003, 7:29 pm
Which is the best choice an alternator, permanent magnet alternator, or
permanent magnet generator, for a micro-hydro project?

My criteria are cost, best efficiency, maintenance.

I am on a senior project, to develop a piece of lab equipment based on
micro-hydro, to benefit mechanical and electrical engineering students.

Posted by Steve Spence on November 22, 2003, 10:51 pm
I like permanent magnet dc generation, however, take a look at

Steve Spence
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Posted by _jj_ on November 22, 2003, 11:38 pm

  Define    "  micro  "   " hydro "   ...

The cold water tap in your lab  ?
  ... or a small ever-flowing stream  ?

  John T.

Posted by Bob on November 22, 2003, 11:50 pm
 A closed water system.  Water is gonna be in a pressurized water tank.  From
the tank to a 2 inch pipe a few feet above the turbine.  The water exits the
turbine into a reservoir which is pumped back into the pressurized water
tank.  It will take 40 gpm max and 10 - 40 psi.  It will be controlled by a
PLC and data will be taken through meters and Labview.

I was trying to find the best solution for power generation hooked to the

Posted by _jj_ on November 23, 2003, 1:04 am

  Good luck ..
  finding that pressurized water tank ..
  and the free pumps
Out in the real world.
John T.

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