Should AC current increase secondary coil or decrease primary coil welder?

It is a method to increase the current by increasing the secondary coil and reducing the welding machine of the primary coil. The secondary coil means that a layer of coil is sandwiched between the primary coil, and its current will be larger than that of the primary coil, while the current of the primary coil is smaller. We can adjust the current of the welding machine by adjusting the secondary coil and current. In addition, we can also change the outer diameter of the primary coil to improve the current, because the larger the outer diameter of the coil, the greater the current.