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harry harry is offline
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Default Voltage regulation wrt resistive and inductive loads...

On Jan 14, 9:22*pm, "
wrote:
On Jan 14, 3:23*pm, harry wrote:









On Jan 14, 2:17*pm, "
wrote:


On Jan 14, 3:37*am, harry wrote:


On Jan 13, 10:18*pm, "MarkK" wrote:


Ill repeat my reply here for the sake of those that filter google groups


thats actually a *real interesting question...


with a pure reactive (inductive or capacitive) load, the current flow
in the windings will cause a voltage drop but if i'm not mistaken
since there is no (or very little) actual power flow, there will not
be a load on the engine so the engine speed will not be a factor.


with a pure resistive load, the current through the windings will
cause a voltage drop AND there will be a load on the engine that will
try to slow it down. *It is the job of the speed governor on the
engine to keep the speed constant. *If the speed drops the voltage and
frequency will drop due to the engine speed drop.


So for a given amps, you may get more of a drop with a resistive load
depending on how tight the governor speed control the engine.


Mark


You neglect the resistance of the generator windings.-


I don't see that he neglected the resistance of the
generator windings. *In a generator the resistance of
the windings is very small, negligible compared to
the resistance of any real load.


If there is no resistance in the load (ie purely inductive/
capacitive), it would be the only resistance in the circuit and hence
hugely important.


There is no such thing as a pure inductor BTW.


Uh, huh. *So, why did you just bring such a load
into the discussion?


Someone else did.

There are almost pure capacitors.- Hide quoted text -


- Show quoted text -


Uh, no. *The generator winding resistance is still small. * Small is
still small, whether you have a purely resistance
load or a load that has a substantial component of
inductance or capcitance, like the welder in question
or a motor.


Uh............Yes. The resistance however small will be the only thing
in the circuit consuming any energy.

One considers the Inductive element of a circuit separately when doing
any calculations.