Synchronous Linear Motor with Non-Contacting Scanning of the Toothed Structure of the Secondary Part
AssigneeSiemens Aktiengesellschaft
InventorsZeljko Jajtic, Markus Knorr, Johannes Wollenberg
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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.
Claims10
1-12. (canceled)
A synchronous linear motor, comprising:
- a primary part;
- a secondary part constructed in the form of a toothed rod in the absence of permanent magnets, said secondary part having a predetermined toothed structure in a movement direction of the primary part;
- and
- a position detection device arranged directly or indirectly on the primary part for scanning the toothed structure, without making contact, in order to obtain a position signal,
- wherein the toothed structure is variable as a function of position, at least in the movement direction.
16 The synchronous linear motor of claim 13, wherein the tooth structure of the secondary part has teeth of different shape in the movement direction.
Dependencies are inferred from the claim text.