Nec offers electromagnetic hammers, which are compact, maintenance-free, operates better than any other conventional hammering system. It prevents clogging and adhesion of powdery and granular materials in spray dryers, cyclone, hoppers, bins, powder conveying ducts, etc. Electromagnetic hammer consists of a stator and rotor, which are made out of high-grade strip lamination to minimize iron losses. There are two salient poles on the stator over which excitation coils are placed. When the hammer is excite by a short duration electric pulse the rotor takes the position of minimum reluctance to magnetic path. The part movement of the rotor shaft is directly transmitted to hammer stroker. The stroker in turn hits the hopper with strong force and returns to the original position.