| 摘要 |
PCT No. PCT/EP80/00001 Sec. 371 Date Sep. 17, 1980 Sec. 102(e) Date Jul. 22, 1980 PCT Filed Jan. 16, 1980 PCT Pub. No. WO80/01525 PCT Pub. Date Jul. 24, 1980.To provide an actual speed output signal upon operation of a permanent magnet motor having a generally trapozoidal or rectangular magnetic flux distribution, and the armature includes a plurality of pulse-energized strands, a sensor winding is placed on the armature and so located that it will pick up a harmonic of flux induced in a conductor to be cut by the rotating flux due to the rotor so that the output speed signal will be a multiple and thus readily analyzable with respect to actual speed in electronic circuitry. The sensor winding extends, preferably, in the same armature slots, or adjacent the armature windings, to be cut by all the flux derived by the rotor so that special winding locations on the armature can be avoided and the sensor winding placed on the armature in conventional positions thereof.
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