Patent ID: 8040073

Claim:
An AC power supply system for balanced energization of a plurality of loads, comprising: (a) an AC power supply device having a first output and a second output for providing an AC supply voltage; and (b) a plurality of current-balancing transformers provided one for each of the plurality of loads, each of the current-balancing transformers having a primary winding and a secondary winding electromagnetically coupled together, each primary winding connected in series to each of the plurality of loads to form a plurality of first series circuits, each of the first series circuits connected in parallel to one another to form a parallel circuit, and each secondary winding connected in series to one another to form a second series circuit, one end of the second series circuit connected to one end of the parallel circuit to form a load circuit, wherein the load circuit is connected to the AC power supply device, one end of the load circuit is connected to the first output of the AC power supply device, and the other end of the load circuit is connected to the second output of the AC power supply device.