Synchronous linear motor with non-contacting scanning of the toothed structure of the secondary part
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jul 10, 2008
app pub date -
Apr 12, 2006
filing date -
Apr 15, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The aim of the invention is the equipping of a synchronous linear motor with a non-permanently-magnetic secondary part with a simple positional measuring system. Said aim is achieved, whereby the tooth structure of the toothed rack-shaped non-permanently-magnetic secondary part (S) varies with position in the direction of movement (B). Furthermore, the synchronous linear motor can be provided with absolute and incremental positional measuring systems, such that the coarse resolution of the absolute measuring system can be supplemented by the fine resolution of the incremental system.
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