[SOLVED] how to simulate load effect on generator using multisim(oldversion)

Hi Everyone,
I am working on generator and interface circuit to generator to be used to charge up battery. I use multisim to simulate the circuit before actually building it. However, I have difficulty to simulate generator loading effect. For example,
electrical power generator (powered by wind or water) is delivering power such and such under no load conditions. When I attach a circuit, say voltage doubler or trippler , it creates a load on generator which makes it harder to generate power and so voltage or power generated is less than under no load. Note that when I attach bridge, it has no loading effect. I would like to know how to simulate that mechanical loading effect on electrical power generator using ordinary circuit components in multisim (for example capacitor, resistor, current source etc). I am attempting to use that to charge a 9v battery. Another interesting observation I made that when attaching generator to battery using diode to block battery source, the voltage on the generator drops (to a battery level) and increases the load to a point that generator stops because load exceeds the mechanical power available. My mechanical power source is of small value equivalent of small solar power cell.
Thank you for your time.
Adam:-|

A simple way to simulate the effect of a load on the generator is to add a resistor in series with the generator. The value of the resistor depends upon the voltage and current output of your generator with load.