| 摘要 |
<p>A rotation detector 10 for a miniature permanent magnet d.c. motor 20 comprises an induction coil 11 wound around a flux ring 15 for the motor. The flux ring 15 has a stepped portion 18 accommodating the windings of the coil 11. The coil 11 produces electrical signals in response to changes in the magnetic field of the stator caused by rotation of the rotor. <IMAGE></p> |
