Induction heating is the process of heating electrically conductive materials, namely metals or semi-conductors, by electromagnetic induction through heat transfer passing through an induction coil that creates an electromagnetic field.  

Induction heating in 3D printing rapidly decreases the amount of time it takes to heat up the nozzle. 

Cosine Additive is using this to accurately control the heat up and cool down of the nozzle while 3D printing. This will reduce ooze between rapid motions, finely control material and part temperature, prevent over temping, and many more applications.