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Planar direct drive unit comprising a position measuring system

A technology of driving device and measuring system, which can be used in electromechanical devices, propulsion systems, electric components, etc., and can solve problems such as increased bearing clearance

Inactive Publication Date: 2006-08-09
INA DRIVES & MECHATRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem in this case is that the bearing clearance has to be increased in order not to damage the test strip during the movement
The position measurement system is useless outside the range of motion detected by the test strip

Method used

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  • Planar direct drive unit comprising a position measuring system
  • Planar direct drive unit comprising a position measuring system
  • Planar direct drive unit comprising a position measuring system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0029] exist figure 1 The planar direct drive shown in includes a passive unit 1 which has a sliding surface 2 on its upper side. On the sliding surface 2 , for example, a cross-shaped toothing is formed, which consists of magnetizable teeth and non-magnetizable tooth grooves. The general construction of such direct drives is known to those skilled in the art, so a detailed description of the function of the planar motor will not be given here.

[0030] Furthermore, the direct drive has a first active unit 3 , which is displaceable on the sliding surface 2 in at least two directions of movement when supplied with a suitable current. For a movement despite the magnetic attraction between the active unit 3 and the passive unit 1 , a bearing unit is required, by means of which the bearing gap 4 is maintained during operation of the direct drive. Air bearings (not shown), which preferably create an air gap between the sliding surface 2 and the active unit 3 , are suitable for th...

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PUM

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Abstract

The invention relates to a planar direct drive unit comprising a passive unit (1), an active unit (3), a bearing unit, and a position measuring system that is provided with a material measure and a measuring sensor which scans the material measure and supplies a position signal. The inventive positioning measuring system encompasses a moved component (7) and a quasi stationary component (8), one of which is formed by the material measure while the other one is formed by the measuring sensor. Both components are disposed outside the bearing gap (4) and at a distance from the running surface (2).

Description

technical field [0001] The present invention relates to a planar direct drive (also known as a planar motor) comprising a position measurement system for controlling the movement of the rotor. This direct drive consists of a passive unit with a flat sliding surface in which the magnetic flux field is integrated. This passive unit forms the stator of the electric motor. In addition, there is at least one active unit (rotor) with coils for generating a variable magnetic flux, which is movable on the sliding surface of the passive unit. In addition, direct drives include bearing units that support low-friction two-dimensional motion between active and passive units. Background technique [0002] The use of a Hall displacement measuring sensor device in linear and planar gears is known, for example, from DE 195 13 325 A1. For this purpose, multiple Hall sensors are integrated into the active unit to measure the changes in the magnetic field due to the relative motion between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03H02K29/06
CPCH02K2201/18H02K41/03H02K29/06
Inventor 约尔格·克格勒尔
Owner INA DRIVES & MECHATRONICS