3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
mitt wrote:
I am a mech engr by degree, but a power electrical engr in my 9-5 job, and I agree that the current in each leg of a 120/240 circuit is different, assuming you have a 120V load attached to one of them.
Thanks. I agree. If the loads are not balanced and equal there is a current (i2 in the diagram) flowing in the common (neutral) connection. If i2 is nonzero it means i1 cannot equal i3 according to Kirchoff's 2nd law. This is true for a perfect AC or DC voltage source, and it's also true for a pair of reactive generator windings with resistance, inductance and capacitance--despite the Professor's claims to the contrary.
If the Professor can prove how i1 and i3 are always equal, regardless of the values of LOAD 1 and LOAD 2, he'd be the one proving Mr Kirchoff wrong.
The issue here is the two identical but independent stator (output) windings share a common field winding. And the current in that field winding is controlled by the AVR based on the voltage of only one of the two stator windings. So the other winding is not properly regulated except when the windings are in parallel in 120 volt mode.
