L.V.D.T.'S

Differential Transformers are wound coil, electromagnetic devices which are used to translate the linear movement of a ferromagnetic armature into an AC voltage which is linearly proportional to the armature position. L.V.D.T. is constructed with primary and secondary coils wound on an air core and contained within a protective metal tube, and a separate moveable armature which controls the electromagnetic coupling between them. The amplitude of the resultant voltage is proportional to the armature position, while the phase sense of the voltage indicates direction of movement from a reference zero position.