Patent ID: 7199691

Claim:
A flat resolver comprising a stator assembly and a movable assembly, each comprising: a magnetic material core comprising: a plate portion; and a plurality of magnetic pole portions, wherein respective plate portions in the stator and movable assemblies are disposed in parallel with each other, and the plurality of magnetic pole portions protrude from a surface of the plate portion, the surface facing to the other assembly; a coil arranged-wiring substrate comprising: an annular shape; surfaces on each of which annular coil patterns having different winding directions is arranged so that a pair of magnetic poles are provided; and an opening at a position corresponding to a center of each of the annular coil patterns, wherein the magnetic pole is inserted into the opening, and wherein a coil is arranged around each of the magnetic pole portions; a transformer winding core disposed on the plate portion; and a transformer winding arranged-wiring substrate having an annular shape; surfaces on each of which a transformer winding is arranged along the annular shape; and disposed on the transformer winding core.