Patent ID: 6765325
Filing Date: 2004-07-20
Classification: F04D,H02K

Abstract:
An alternating-current electric motor including a stator magnetic circuit, which comprises a first part (2) on which electrical windings (7, 8) are mounted and a second, hollow, part (10), a cylindrical rotor (14) equipped with a rotational shaft (15) supported by at least two bearings (16 and 17), the said rotor being arranged inside the hollow part of the stator circuit, and a stator chamber (20) with a leaktight wall, at least a part of which is produced from an insulating material, within which are mounted the first part (2) of the stator circuit and the electrical windings (7, 8), and outside which lie the cylindrical rotor (14), its rotational shaft (I 5) and the support bearings (16 and 17), which motor is characterized in that the second part (10) of the stator circuit lies outside the stator chamber (20) and in that this second part (10) of the stator circuit, the cylindrical rotor (14) with its rotational shaft (15) and the support bearings (16 and 17) are arranged in such a way, outside the stator chamber (20), that the stator magnetic circuit passes in a leaktight manner through the leaktight wall of the said chamber in the part of this wall produced from insulating material, which material is a non-magnetic insulant.