| 摘要 |
A drive device comprising at least one exciter winding, which is used to produce a modifiable magnetic field, consisting of an associated magnetic-flow guiding main yoke body and a counter yoke body, in addition to an armature body, which can be set into an axially oscillating motion, with two permanent magnetic magnet parts which are disposed between the yoke bodies. The limbs of the yoke bodies have reciprocal distances and predetermined axial widths which are adapted to the axial extension of the magnet parts.
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