| 摘要 |
Reluctance sensor for measurement of speed of rotation, in particular in rail vehicles, having a measurement winding mounted on an open measurement core consisting of two pole pieces between which is a permanent magnet, while opposite the pole pieces is a rotationally cogged ferromagnetic ring, characterized in that as close as possible to the measurement core (2) is a compensating core (6) containing a permanent magnet (8) and having a shorted magnetic circuit, on which is a compensating winding (9) situated most preferably parallel to the measurement winding (1) and preferably with the same number of turns, while both windings (1, 9) are connected together in a push-pull arrangement.<IMAGE>
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