Can you combine two generators circuits together?

Proton LED engineer in Lyons GA says: the two circuits would have to be in phase in order to combine them.

*Actually you can always combine generator circuits. The problem comes in with HOW in phase the circuits are. If the generators are in phase (0 degrees apart) their AC voltages and currents would combine completely, but if they are out of phase (90 degrees apart) the voltages and currents will appose each other to such an extent that they will basically cancel each other out. The trick is to apply some sort of phase correction to one of the circuits in order to modify the phase difference between the two so that you can get the desired power output. Just be careful not to exceed your rated line currents when combining two generator circuits, otherwise things could get smoky! - Tristan JvR