Temperature control using heating elements such as nickel-chromium, iron-chromium-aluminum, far-infrared heating elements, silicon-molybdenum rods, and silicon-carbon rods.

Salt bath furnaces, industrial frequency induction furnaces, quenching furnaces, and temperature control for molten glass heating.

Rectifier transformers, power regulators (pure inductive coils), electric furnace transformer primary side, magnetic field enhancement/demagnetization adjustment, DC motor control.