Two sinusoidal AC signals of 220V with a phase difference can be problematic, as the phase difference may reduce the overall amplitude when combined. To eliminate the phase difference, the generators must be synchronized, ideally mounted on the same shaft to ensure they rotate together. Attempting to merge the outputs of unsynchronized generators can be dangerous and is not recommended. It may be more practical and safer to purchase a new generator that provides the required 2A at 220V. The discussion emphasizes the risks associated with working with high voltage AC signals.