An inductor device comprising: • a prismatic magnetic core with eight vertexes and six faces defining an axis, an axis, and an axis orthogonal to one another; • an electrically insulating support made of a single part with a prismatic cavity arranged around and housing said magnetic core, said cavity being accessible through an opening surrounded by a frame having four sides arranged opposite one another in twos, said frame being arranged flush with or above the level of the magnetic core, and said electrically insulating support being provided with at least: o winding supporting outer faces (12X, 12Y and 12Z), including four additional winding supporting outer faces (12X and 12Y) formed on said four sides of the frame, o four lower corner protuberances arranged on four vertexes of the magnetic core, and o winding limiting edges perpendicular to the winding supporting outer faces (12X, 12Y and 12Z), and perpendicular to said four additional winding supporting outer faces (12X, 12Y); • three windings (DX, DY, DZ) of conductive wire arranged orthogonal to one another wound around said magnetic core supported on said winding supporting faces (12X, 12Y and 12Z), confined between the winding limiting edges and centered with respect to the three orthogonal axes (X, Y, Z), such that when a current circulates through the mentioned windings (DX, DY, DZ), an electromagnetic field with electromagnetic field vectors coaxial with the axes of each of the windings is generated characterized in that said prismatic magnetic core is a rectangular prismatic magnetic core with only six faces and eight vertexes; said prismatic cavity is a rectangular prismatic cavity such that said electrically insulating support completely surrounds all but one of the six faces of the magnetic core; said magnetic core is formed by a magnetic cement poured and set inside the cavity of said electrically insulating support or by a PBM or PBSM material injected and set inside the mentioned cavity, wherein said electrically insulating support assures symmetry and orthogonality of said electromagnetic field vectors generated by the mentioned inductor device. • a prismatic magnetic core with eight vertexes and six faces defining an axis, an axis, and an axis orthogonal to one another; • an electrically insulating support made of a single part with a prismatic cavity arranged around and housing said magnetic core, said cavity being accessible through an opening surrounded by a frame having four sides arranged opposite one another in twos, said frame being arranged flush with or above the level of the magnetic core, and said electrically insulating support being provided with at least: o winding supporting outer faces (12X, 12Y and 12Z), including four additional winding supporting outer faces (12X and 12Y) formed on said four sides of the frame, o four lower corner protuberances arranged on four vertexes of the magnetic core, and o winding limiting edges perpendicular to the winding supporting outer faces (12X, 12Y and 12Z), and perpendicular to said four additional winding supporting outer faces (12X, 12Y); o winding supporting outer faces (12X, 12Y and 12Z), including four additional winding supporting outer faces (12X and 12Y) formed on said four sides of the frame, o four lower corner protuberances arranged on four vertexes of the magnetic core, and o winding limiting edges perpendicular to the winding supporting outer faces (12X, 12Y and 12Z), and perpendicular to said four additional winding supporting outer faces (12X, 12Y); • three windings (DX, DY, DZ) of conductive wire arranged orthogonal to one another wound around said magnetic core supported on said winding supporting faces (12X, 12Y and 12Z), confined between the winding limiting edges and centered with respect to the three orthogonal axes (X, Y, Z), such that when a current circulates through the mentioned windings (DX, DY, DZ), an electromagnetic field with electromagnetic field vectors coaxial with the axes of each of the windings is generated