Encapsulated rotating machine and its method of manufacture

摘要

The machine has a magnetic bearing including a stator armature (104) provided with windings (142, 143) and a ferromagnetic body (141). The windings and the body are positioned in a protective metal enclosure comprising a thin can or sleeve (103) and a hermetic passage (108) through which power supply wires (108a) of the windings are passed. A dead volume (109) is created at inside the enclosure. An implementing unit permits the volume to be put into empty vacuum before closing the enclosure by a sealing cap (102a) in order to impose pressure lower than atmospheric pressure in the volume. An independent claim is also included for a method for manufacturing a sleeved rotary machine.