Patent ID: 7375451
Filing Date: 2008-05-20
Classification: H02K

Abstract:
1. Electric motor ( 1 ) comprising a single body stator ( 2 ), a single body magnetic induction core ( 3 ) constrained to said stator, at one coil of magnetic excitation ( 4 a , 4 b ) associated to said induction core, a rotor ( 5 ) of substantially cylindrical shape comprising at least one permanent magnet adapted to form on said rotor at least two magnetic poles of opposite polarity, said induction core and said at least one coil being adapted to form at least two magnetic induction poles of opposite polarity on said induction core is produced in a single body and comprises a circular central bole ( 31 ) for housing said rotor ( 5 ), a ring-shaped air gap ( 8 ) between said rotor ( 5 ) and said induction core, at least two opposing extensions adapted to form said at least two magnetic induction poles in opposite position for each other and in proximity to said circular central hole, at least two opposing and external magnetic separation notches on the entirety of an outer surface of said induction core, said external magnetic separation notches being alternately arranged in respect to said extensions, adapted to generate a magnetic separation between two adjacent, opposite-sign poles of the induction core, such tat the rotor is arranged with each magnetic pole between two adjacent poles of the induction core when the motor is de-energized, said at least two opposing extensions are further characterized in that they are an integrally formed part of the single body magnetic core.