work coil การใช้

This creates a rapidly oscillating, ultrastrong electromagnetic field around the work coil.
Because of Lenz's Law, the magnetic fields created within the conductor and work coil strongly repel each other.
In practice the metal workpiece to be fabricated is placed in proximity to a heavily constructed coil of wire ( called the " work coil " ).
A huge pulse of current is forced through the work coil by rapidly discharging a high voltage capacitor bank using an ignitron or a spark gap as a switch.
The frequency of current used depends on the object size, material type, coupling ( between the work coil and the object to be heated ) and the penetration depth.