| 摘要 |
An induction device comprises a winding support with a base having connection points. The upper side of the base carries a centering member having an exterior surface that defines either a cylindrical or conical surface co-axial with the cylindrical central portion of a core. A winding is provided about the central portion of the core. The core has a non-circumferentially or rotationally symmetrical upper flange. A ferromagnetic adjusting core in a form of a cap is arranged over the core that carries the coil, the portion of the cap facing the base having internally a shape a radial dimensions corresponding to the cylindrical or conical surface of the centering member. The cap encloses the centering member with a close fit, so that the adjusting core is rotatable about the axis of the core that carries a winding. The portion of the adjusting core adjacent to the upper flange portion of the core that carries a winding is also non-circumferentially (i.e., rotationally) symmetrical.
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