ELECTRIC MOTOR Russian patent published in 2009 - IPC H02K21/12 H02K1/27 

FIELD: engines and pumps.

SUBSTANCE: invention is related to the field of electrical engineering, in particular - to electromagnetic rotors of electric motors. According to the first version of realisation, electric motor comprises stator and rotor installed in stator with the possibility of rotation and rotated by means of rotor interaction with stator, in which multiple elements of core and magnets are alternately installed along circumference, besides in radial direction of rotor axial length of core elements on external circumference inverted to stator, exceeds axial length of other sections of rotor core elements, axial length of rotor core elements on external circumference inverted to stator, is at least equal to axial length of stator, besides axial length of external circumference of magnets is more than axial length of other sections of magnets. According to the second version of realisation, electric motor comprises stator and rotor installed with the possibility of rotation in stator, in which multiple magnets and multiple core elements made of iron by means of powder metallurgy are alternately arranged in circumferential direction, besides manufactured specified core elements must be separated from each other, moreover in radial direction of rotor axial lengths of core element and rotor magnets on external surface inverted to stator exceed axial length of their other sections, besides axial lengths of core elements and rotor magnets on circumference inverted to stator are equal to axial length of stator, and magnets are installed in circumferential direction so that neighboring magnets are inverted to each other with identical poles, moreover there are stop protrusions that extend in circumferential direction of rotor, on every of two ends of specified core elements for prevention of magnets separation from core elements. Location of multiple core elements and magnets alternately in circumferential direction excludes passage of magnet flow of magnets between core elements that are neighboring along circumference, which provides for technical result that consists in minimisation of magnetic flux dispersion. Since neighboring magnets installed in circumferential direction are inverted to each other with identical poles, magnetic flux may be concentrated in appropriate core elements. Axial length of core elements and magnets in circumference inverted to stator in circumferential direction is more than axial length of accordingly other sections of core elements and magnets.

EFFECT: electric motor torque increases, and production costs are reduced.

11 cl, 9 dwg