| 摘要 |
A ROTOR ASSEMBLY (1) FOR AN ELECTRIC MACHINE SUCH AS A MOTOR COMPRISES A ROTOR (3)ON A SHAFT (2) HAVING A BEARING (7, 8) AT EACH END PORTION, THE BEARINGS BEING ARRANGED TO ROTATABLY SUPPORT THE ROTOR AND SHAFT. THE ASSEMBLY FURTHER COMPRISES A BALANCING MEMBER (40), FROM WHICH MATERIAL MAY BE REMOVED FOR BALANCING THE ROTOR ASSEMBLY. THE BALANCING MEMBER IS LOCATED IN A PREDETERMINED POSITION AND ORIENTATION WITH RESPECT TO THE ROTOR. THE BALANCING MEMBER INCLUDES AN ENCODER DISK (42), ARRANGED TO PERMIT THE POSITION OF THE ROTOR WITH RESPECT TO A STATOR (13) TO BE DETERMINED. THE PROVISION OF A BALANCING MEMBER HAVING AN INTEGRAL ENCODER DISK FACILITATES THE MANUFACTURE OF THE ROTOR ASSEMBLY. AS THE BALANCING MEMBER IS LOCATED IN A PREDETERMINED POSITION, THE ENCODER AUTOMATICALLY ASSUMES A PREDETERMINED POSITION AND HENCE THE POSITION OF THE ROTOR CAN BE DETERMINED WITH CERTAINTY. |
