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#1
Start by
Terry A. Maiers, BT, MS
10-22-2013 08:15 AM

Electrical generation

I am interested in finding out if any electrical motor can be used as a source of generating electrical energy if there is a turbine attached that turned the rotor or is it a special design to generated energy?
10-22-2013 10:57 AM
Top #2
Peter Wung
10-22-2013 10:57 AM
Any machine can be used to motor or generate, the complexity comes from the interface ans storage. Some machines will suck reactive power and the output real power, so the tradeoff isn't great.
10-22-2013 01:19 PM
Top #3
Terry A. Maiers, BT, MS
10-22-2013 01:19 PM
So if I understand it correctly the motor can produce or use energy it just depends on out turns the rotor?

If an electrical source provides the energy to turn the rotor then the motor provide work to some other piece of equipment.

If some other source (such as wind) provides the means to turn the rotor then the motor produces energy instead of using it.

Correct?
10-22-2013 04:05 PM
Top #4
Peter Wung
10-22-2013 04:05 PM
An electric machine is a three terminal device. Two electrical, one mechanical.

In Dc machines, both electrical terminals are DC. In all machines one electrical terminal is field the other is armature. In AC machines, the field terminal pulls reactive power or DC power. The armature terminal pulls or supplies real power.

For a motor, bother terminals are pulling current from the grid and the output is the mechanical shaft. For a generator, the input is mechanical and the armature out put is real power. In the case of an induction generator, it is pulling reactive power from the grid at the same time. In a synchronous machine, the field input is a separate DC source.
10-22-2013 06:16 PM
Top #5
Tomo Pokrajac
10-22-2013 06:16 PM
Terry,
All rotational electrical machines can work either as motors (mechanical power output) or generators (electrical power output). Depending on the type of the machine single line diagram (connecton diagram) is different. What type of machine you have in mind (DC or AC asynchronous or AC synchronous)?
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