FIELD: electrical engineering; submersible motors for driving oil-extracting centrifugal or screw pumps.
SUBSTANCE: proposed motor section has case accommodating stator and shaft-mounted rotor. The latter is double-stack structure incorporating two annular permanent magnets radially magnetized in different directions and disposed under rotor stacks. Nonmagnetic bushing is disposed between rotor stacks; shaft is made of magnetic material. Magnets of one section of sectionalized valve-type motor are magnetized in different directions and magnets of adjacent sections abutting against one another are magnetized unidirectionally.
EFFECT: enhanced efficiency, reduced mass and size.
6 cl, 3 dwg
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