Patent ID: 6366189
Filing Date: 2002-04-02
Classification: H01F

Abstract:
A solenoid (1) comprising:a coil assembly consisting of two stationary coils (2, 3), which are located axially beside each other and are current supplied at the same time, and magnetically-active inner and outer elements of which at least one is composed of a single essentially axially magnetized permanent magnet (4, 5), wherein the coils are located between the inner and outer elements (4, 5), so that they surround the inner element (4), and are arranged with mutually different current directions, and the coils and the inner and outer elements (4, 5) are arranged around an essentially mutual axial center line (6), so that a magnetic field is obtained between the inner and outer elements (4, 5), said magnetic field crosses the current supplied coils essentially perpendicularly to wires defining the coils and gives rise to an axial power action between the coils and the inner and outer elements, wherein at least one of the inner and outer elements is axially movable.