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Vibration mirror motor

A galvanometer motor and rotor technology, applied in electromechanical devices, electrical components, electric components, etc., can solve problems such as limiting response speed, affecting running accuracy, low axial stiffness, etc., to eliminate drift, achieve positioning, and improve performance. Effect

Active Publication Date: 2007-12-05
HANS LASER TECH IND GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, the position feedback used by the vibrating mirror motor mostly adopts capacitive or inductive sensors. Due to the drift of these sensors, the accuracy, repeatability and stability of the vibrating mirror motor are greatly restricted.
In addition, the galvanometer motor is a two-pole structure and supported by ball bearings, the relatively low moment / inertia ratio limits the response speed, and the low axial stiffness also affects its running accuracy

Method used

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Examples

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Embodiment Construction

[0023] As shown in FIGS. 1 to 6, the galvanometer motor 1 of the present invention includes a stationary stator 2 and a rotor 3 that rotates relative to the stator 2. Among them, the stator 2 includes a coil 5, a frame 6 and a yoke 7. The frame 6 is made of non-magnetic material with long slots spaced apart. The coil 5 is reshaped and placed in the long slots of the frame 6 and connected in a certain order. For the multi-pole winding, the coil 5 and the skeleton 6 are vacuum casted into the yoke 7 by epoxy resin. The rotor 3 includes a magnet 8, a rotating shaft 9 and a bearing 10. A plurality of magnets 8 with alternating polarities are pasted on the magnetic rotating shaft 9 to form a multi-pole rotor. The magnetic rotating shaft 9 includes a main shaft (not shown) covered by the magnet 8, which is High magnetic permeability material, both ends are connected to the non-magnetic shaft extensions 11 and 12 respectively. The bearing 10 is an angular contact ball bearing and is inst...

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PUM

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Abstract

The invention relates to a vibration mirror electric machine, comprising stator, rotor rotating relative to the stator, and position feedback device for feeding back rotation position of the rotor, where the position feedback device is a grating encoder. And it uses the grating encoder to eliminate the problem that system performance is not stable caused by zero position and gain drift of traditional capacitance or inductance vibration mirror electric machine. Besides, it adopts multipolar slotless electric machine structure to increase response speed of the vibration mirror electric machine.

Description

【Technical Field】 [0001] The invention relates to a motor, in particular to a moving magnet galvanometer motor which can be used in laser marking, optical scanning or similar systems. 【technical background】 [0002] Galvo motors usually have different structures and configurations. Traditionally, the position feedback used by the galvanometer motor mostly uses capacitive or inductive sensors. Due to the drift of these sensors, the accuracy, repeatability and stability of the galvanometer motor are greatly restricted. In addition, the galvanometer motor has a two-pole structure and is supported by ball bearings. The relatively low torque / inertia ratio limits the response speed, and the low axial stiffness also affects its operating accuracy. [Content of the invention] [0003] The technical problem to be solved by the present invention is to provide a moving magnetic galvanometer motor controlled by a grating encoder to eliminate the unstable system performance caused by the zero...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/10H02K33/00H02K1/22H02K5/00
Inventor 高云峰廖有用王光能付晓辉
Owner HANS LASER TECH IND GRP CO LTD
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