Electric motor with disc-shaped magnetised rotor

摘要

In the present motor, the annular magnetised part (5) of the rotor is fixed on a part (9) of a ball bearing by way of a flat annular disc (7), the flat annular surfaces of which are in contact with respective flat annular surfaces of the said rotor part (5) and of the said bearing part (9). The invention applies more particularly to two-stage motors of the abovementioned type. It makes it possible, within the framework of a simple and economical structure, to accomplish very high accuracy in the definition of the position of the magnetised part of the rotor with respect to the stator. <IMAGE>