A Novel Transformer with Compensating Coil

In this invented transformer, a compensating coil is series connected with the secondary coil in opposite polarity. The magnetomotive forces generated by the loading current in the secondary coil and the compensating coil are cancelled out. The power can be delivered with zero input current in the primary coil when the turn number of secondary coil is the same as that of compensating coil. When a boost coil is added to the compensating coil, the input current in primary coil is phase inverted relative to its input voltage. A magnetic shunt is added to adjust the flux leakage of this transformer.