Galvanometer drive with multi-layer permanent magnets
A driving device and galvanometer technology, applied in the field of mirrors, can solve problems such as difficult construction of radial grooves, insufficient suppression of permanent magnets, etc., and achieve the effect of improving efficiency and suppressing eddy currents
Active Publication Date: 2019-08-06
SCANLAB GMBH
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Problems solved by technology
However, it has the disadvantage that radial slots are difficult to construct in permanent magnets and only insufficiently suppress eddy currents
Method used
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[0038] Figure 1a A galvanometer drive 1 is shown which has a rotor 3 rotatable about an axis of rotation 2 . At least one section of rotor 3 is designed as a permanent magnet 4 . For clarity, the permanent magnets 4 are not hatched. In the present figure, this section is located in the region of the stator 5 . The permanent magnet 4 thus forms at least one part or section of the shaft of the galvanometer drive 1 . As mentioned above, the galvanometer drive 1 further comprises a stator 5 surrounding the permanent magnet 4, the stator 5 comprising coils (not shown in detail in this figure). The stator 5 is formed from two stator components 5 a and 5 b , wherein the stator 5 can of course also be constructed in one piece or from a plurality of stator components. Furthermore, the windings of the coils can be located in both stator components 5a and 5b, but it is of course also possible to arrange one coil in each stator component 5a and 5b.
[0039] A bearing extension 6 a , ...
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Abstract
The invention relates to a galvanometer drive having a rotor (3) which can rotate about a rotational axis (2) and is formed, at least in one section, by a permanent magnet (4), and a stator (5) whichsurrounds the permanent magnet (4) and comprises a coil. According to the invention, the permanent magnet (4) has at least two magnet layers (10) and at least one electrically insulating intermediatelayer (11) which is arranged between said two magnetic layers (10). In addition, the invention comprises a manufacturing method for a rotor (3), embodied as a permanent magnet (4), of a galvanometer drive (1). According to the invention, a plurality of magnet layers (10) are connected to one another in a materially joined fashion to form a blank and / or the external contour of the blank is subsequently post-processed, in particular mechanically, to construct the rotor. Furthermore, the invention comprises a deflection unit for deflecting a laser beam with an optical deflection element, in particular a mirror, and a galvanometer drive (1) which is connected thereto and by means of which the deflection element can be rotated bidirectionally over a limited rotational range.
Description
technical field [0001] The invention relates to a galvanometer drive comprising a rotor rotatable about an axis of rotation, at least one section of which is formed by permanent magnets. Furthermore, the galvanometer drive has a stator surrounding a permanent magnet, which includes a coil. The invention further relates to a method for producing a rotor designed as a permanent magnet for a galvanometer drive. The invention also relates to a deflection unit for deflecting a laser beam, comprising: an optical deflection element, in particular a mirror; and a galvanometer drive connected to the optical deflection element, by means of which the deflection element It can rotate in both directions within a limited rotation range. Background technique [0002] Especially in the implementation of laser applications such as laser marking, generative manufacturing, laser welding or laser cutting, galvanometer drives are used to position optical elements, such as mirrors, to deflect t...
Claims
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IPC IPC(8): H02K26/00G02B26/10H02K1/27G01R5/06
CPCH02K26/00H02K1/272H02K1/02H02K1/04H02K15/03B23K26/064B23K26/0643H02K2201/09H02K2213/03G01R5/06G02B26/105H02K1/2733
Inventor 佩斯切克·诺伯特
Owner SCANLAB GMBH