Importance

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Abstract

A synchronous electric motor includes a stator lamination pack (2) provided with at least one electric winding (6, 6') and a rotor (3) wade of a material with high magnetic retentivity. The laminations (4) of the pack (2) are arranged parallel to the axis of the rotor (Z) to limit the transverse dimension of the motor (1). The lamination pack (2) is U-shaped, with straight segments (5, 5') on which windings (6,6') are formed. The axes of their turns are substantially parallel to the axis (Z) of the rotor (3). At the segments (5, 5') the laminations (4) have different heights along a direction (X) which is transverse to the axis (Z) of the rotor (3). The lamination pack (2), together with its windings, is embedded in a matrix (12) of insulating resin, which is in turn enclosed tight within a substantially rigid container (11) made of dielectric material, forming a sealed modular capsule. This capsule can be coupled to rotor units of different types to form submersible pumps.

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