DC motor using magnetic field of rotor as transmission medium - has wiegand conductor with measuring coil at angle to shaft responding to poles

摘要

The d.c. motor has electronic commutation and a rotor angular displacement transmission and receiving system which uses the magnetic field of the rotor as a transmission medium. It incorporates a fixed module which is sensitive to the magnetic field and acts as the receiver. This module responds to the rotating north and south pole of the rotor. The module consists of a Wiegand conductor(5) surrounded by a measuring coil (6). The Wiegand conductor is at right angles to the rotor shaft (3). Its length is equal to the distance between a north and a south pole. The measuring coil determines the condition of magnetisation of the conductor.