Magnetic linear drive
AssigneeSiemens Aktiengesellschaft
InventorsAndreas Arndt, Wolf Rüdiger Canders, Karl Mascher, Klaus Schuler, Holger Gerhard Wisken, Hardo May, Herbert Weh
Life of this patent
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Abstract
A magnetic linear drive has a coil in whose interior the current can produce a magnetic flux in an axial directions, having an armature which can move only at right angles to the axial direction and which has a magnetically active part which is magnetized, in particular, parallel to, but in the opposite direction to, the axial direction. The armature is driven by a current surge which accelerates the magnetically active part toward the coil center irrespective of its initial position.
Claims11
A magnetic linear drive for an electrical switch, comprising:
- a coil through which a current passes the coil and the coil having an interior in which the current produces a magnetic flux in an axial direction, having an armature which moves only at right angles to the axial direction and which has a magnetically active part whose movement path passes through an airgap within a core which passes through the first coil, or passes one end face of the core, with the magnetically active part being demagnetized or magnetized in such a manner that the magnetic flux runs parallel to the axial direction, or parallel to the axial direction but in an opposite direction, within the magnetically active part, wherein
- the magnetically active part can be positioned permanently in a first and second limit position and can be moved from the first limit position to a further comprising a yoke body which is arranged outside the coil, second limit position by a current.
A method for operating a magnetic linear drive having at least one coil through which a current passes, each of at least one coils, having an interior in which the current produces a magnetic flux in an axial direction, and an armature which moves at right angles to the axial direction and which has a magnetically active part whose movement path passes through an airgap within a core which passes through the coils or passes one end face of the core, with the magnetically active part being demagnetized or magnetized such that the magnetic flux runs parallel to the axial direction or parallel to the axial direction but in an opposite direction, within the magnetically active part which can be positioned permanently in a first and second limit position and can be moved from the first limit position to the second limit position by a current, comprising passing a current through the coils in a same direction
- to drive the armature in different directions.
A method for operating a magnetic linear drive having at least one coil through which a current passes, each of at least one coils, having an interior in which the current produces a magnetic flux in an axial direction, and an armature which moves at right angles to the axial direction and which has a magnetically active part whose movement path passes through an airgap within a core which passes through the coils or passes one end face of the core, with the magnetically active part being demagnetized or magnetized such that the magnetic flux runs parallel to the axial direction or parallel to the axial direction but in an opposite direction, within the magnetically active part which can be positioned permanently in a first and second limit position and can be moved from the first limit position to the second limit position by a current, comprising:
- producing a current in the at least one coil whose resultant magnetic flux in the respective coil is parallel to, but in the opposite direction to, any magnetization of the magnetically active part, if the magnetically active part is magnetized:
- and
- reversing the direction through the at least one coil once the magnetically active part has reached the location of the greatest magnetic field strength of the coil on its movement path.
Dependencies are inferred from the claim text.