Alternator Voltage Regulation

What does the next page in the text book say about it?

sorry, could not find in book. Appears generator with no moving parts.....

sks

http://lmgtfy.com/?q=generator+with+no+moving+parts&l=1

Try the other book!

What does "voltage regulation" actually mean?

What does "regulation" actually mean?

What does "voltage" actually mean?

voltage regulation is the ratio of change in voltage from no load to full load expressed as a percentage of full load (for max regulation)...

....but NOT regulating!! Static.

This is a built in design feature of some specific physical dimensions of the stator and rotor.

In my time, a 45% droop was generally used. That is from no load to full load, with no regulation, the output voltage would drop (droop) 45% from its norm.

The droop must be tailored to the requirements of the regulator. It could even be set up to stay at the same voltage, theoretically then no regulation required, but I have never ever seen one so designed....but it is possible, but feeding a short would be really dangerous under such conditions....

The droop is basically a safety feature to prevent overloading the prime mover....as a good regulator will stop adding more "excitement" once full load is reached.

Usually plus a small amount of "allowed" overload....

My infos are probably not bang up to date in some detail, but hopefully will give you an idea or two....

Wiki says: voltage regulation is a measure of change in the voltage magnitude between the sending and receiving end of a component, such as a transmission or distribution line.

My God Man! can't you even search?

Static means steady state, unchanging, non-dynamic, etc.

In case of Gensets (Engine + Alternators), static condition is the condition when Load, Voltage, Speed of the engine is not changed. if any of these changes then voltage regulation of the alternator may change.

The other condition is known as Transient Condition... where load conditions changes affecting Speed of the prime Mover and hence the Committed Voltage regulation would be out of question. In these cases of Transient Conditions, The Voltage behaviour (Voltage dip and Voltage Rise) with the recovery time needs to be studied.

Regards,

Vishram LELE

But if OP's definition in #5 is correct (as far as I'm aware it is) it refers to load change from zero to maximum.

I find it open to misinterpretation....Post #5 that is....

I'd have thought #5 should say regulation = volt drop/no-load volts, not volt drop/full-load volts, but either way the load is increased from zero to max.