SYNCHRONOUS BRUSHLESS DC ELECTRIC MOTOR WITH COMBINED WINDINGS AND METHOD FOR FORMATION OF COMBINED WINDING

摘要

FIELD: electrical engineering.;SUBSTANCE: invention relates to the field of electric engineering, in particular to the brushless DC electric motor. Synchronous brushless DC electric motor includes a nine-phase winding with the same number of slots per phase, which consists of three three-phase windings connected in parallel, two of which are connected to a star and one to a triangle. Each winding consists of a set of coils, combined into groups with an equal number of coils, arranged taking into account alternate change of current direction within one group, and is part of the magnetic system; number of stator teeth of magnetic system differs from number of magnetic poles of movable part of electric motor by a value multiple of two, forming a resultant magnetic field with number of magnetic poles of stator equal to number of magnetic poles of movable part. At that, groups of coils are arranged in pairs with alternation of connection into star and triangle, forming in each pair angle between vectors of magnetic flux of 90 electric degrees. Groups of coils related to one phase are offset relative to groups of coils related to other phases by 120 electrical degrees.;EFFECT: improved operational characteristics.;4 cl, 2 dwg