Galvanometer drive with multi-layer permanent magnets
AssigneeSCANLAB GmbH
InventorNorbert Petschik
Life of this patent
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Abstract
A galvanometer drive particularly useful for a deflection unit includes a rotor that is rotatable about a rotational axis, the rotor formed in at least one section by a permanent magnet. A stator surrounds the permanent magnet, the stator including a coil. The permanent magnet includes at least two magnetic layers and at least one electrically insulating intermediate layer arranged between the two magnetic layers. A method for manufacturing the rotor for the galvanometer is also provided.
Claims12
A galvanometer drive, comprising:
- a rotor that is rotatable about a rotational axis, the rotor formed in at least one section by a permanent magnet having opposite end faces;
- a support projection connected to and extending from each of the opposite end faces of the permanent magnet, wherein the permanent magnet is rotationally mountable via the support projections;
- a stator surrounding the permanent magnet, the stator including a coil;
- wherein the permanent magnet comprises at least two magnetic layers and at least one electrically insulating intermediate layer arranged between the two magnetic layers;
- wherein the permanent magnet comprises a plurality of the magnetic layers and a plurality of the intermediate layers arranged in an alternating manner one above the other;
- and
- wherein the magnetic layers and the intermediate layers extend completely through the rotor in a transverse direction of the rotor.
A method for manufacturing a rotatable rotor of a galvanometer drive, wherein the rotor comprises at least one section formed from a permanent magnet having opposite end faces, the permanent magnet comprising a plurality of stacked magnetic layers separated by an insulating intermediate layer between adjacent ones of the magnetic layers wherein the magnetic layers and the intermediate layers extend completely through the rotor in a transverse direction of the rotor, the method comprising:
- joining the magnetic layers and the intermediate layers together into a blank;
- working an outer contour of the blank into the rotor;
- and
- connecting a support projection to each of the opposite end faces, the support projections coaxial with a rotational axis of the rotor.
Dependencies are inferred from the claim text.