| 摘要 |
A connector module (11) for an electric motor is in the form of first and second contact ball-bearing assemblies (12, 13) mounted coaxially about the motor shaft (5) in a single plane, such that a first component (15) rotates with respect to a second component (16), and the assemblies serve to provide a constant electrical connection between a source of power and the rotor of the motor. In an alternative arrangement, the electrical connection is effected by means of mercury reservoirs. The described invention extends to arrangements for sensing the displacement of the rotor and stator of electric motors, involving the use of a displacement encoder bearing a sensible pattern which is located on the stator and sensing circuitry on the rotor. The encoders may take the form of parallel tracks, each bearing a sequence of portions exhibiting different sensible characteristics or, alternatively, may take the form of an element bearing a pattern in the form of a sequence of three portions each bearing different sensible characteristics.
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