| 摘要 |
<p>An electric motor has a fixed stator assembly and a rotatable rotor assembly and the air gap between them extends in the axial direction of the motor. The motor assembly is displaceable axially away from the stator assembly into engagement with a brake. The axial position of the brake and hence of the rotor assembly is adjustable. On energising the motor the rotor assembly moves out of engagement with the brake and takes up a position with a predetermined air gap between the rotor and stator assemblies.</p> |
