Seam Welding Transformers

Additional Details

This is a device for transforming an alternating current at a particular voltage to an alternating current at a higher or lower voltage.  A simple transformer consists of an iron core on which two coils of wire are wound.  When the primary coil is connected to the electricity supply, the AC current causes an alternating magnetic field within the iron core.  This magnetic field in turn produces an alternating current in the second coil.  If the secondary coil has a smaller number of coils than the primary coil, the output voltage will be lower than the input voltage but the output current will be higher than the input current.