Patent ID: 9362789
Filing Date: 2016-06-07
CPC Classification: H02K

Claim Text:
1. A magnetic field modulated transverse flux multiphase permanent magnet motor, comprising a stator and a rotor, wherein said stator and said rotor are spaced apart from each other to form an air gap therebetween, said stator comprising a stator casing ( 1 ) and m armature units, where m is a number of phases of said magnetic field modulated transverse flux multiphase permanent magnet motor, and m≧3, each of said armature units comprising an armature core and an armature winding ( 2 ), wherein each of said armature cores comprises n stator core teeth, wherein n is an integer, each of said stator core teeth having a first stator teeth section ( 3 ), a second stator teeth section ( 4 ), and a third stator teeth section ( 5 ), wherein each of said first stator teeth section ( 3 ), said second stator teeth section 4 , and said third stator teeth section ( 5 ) has an annular structure and has a same external diameter, said second stator teeth section ( 4 ) being provided between said first stator teeth section ( 3 ) and said third stator teeth section ( 5 ), wherein an internal diameter of said second stator teeth section ( 4 ) is greater than that of said first stator teeth section ( 3 ) and said third stator teeth section ( 5 ), while an internal diameter of said first stator teeth section ( 3 ) is the same as that of said third stator teeth section ( 5 ), said first stator teeth section ( 3 ), said second stator teeth section ( 4 ), and said third stator teeth section ( 5 ) being eccentrically arranged to share a common central longitudinal axis, said armature winding ( 2 ) being embedded in a space formed between said first stator teeth section ( 3 ), said second stator teeth section ( 4 ) and said third stator teeth section ( 5 ), said stator casing ( 1 ) being tubular in structure, and having a plurality of casing slots ( 100 ) forming on an inner surface thereof, wherein said casing slots ( 100 ) are longitudinally formed along a longitudinal direction of said stator casing ( 1 ), wherein a number of casing slots ( 100 ) formed on said stator casing ( 1 ) is equal to a number of said stator core teeth, said stator core teeth being engaged with said casing slots respectively from a circumferential direction of said stator casing ( 1 ), wherein a transverse depth of each of said stator core teeth is greater than or equal to a transverse depth of said corresponding casing slot of said stator casing ( 1 ), said armature units being sequentially arranged along a longitudinal direction of said stator casing ( 1 ), wherein each of said armature units are distributed along said circumferential direction of said stator casing ( 1 ) in such a manner that each of said armature units has an electrical angle of 360°/m, said rotor comprising a rotor core and k rotor permanent magnets ( 9 ), where k is an even number, wherein said rotor core has a first rotor core section ( 6 ), a second rotor core section ( 7 ), and a third rotor core section ( 8 ), each of said first rotor core section ( 6 ), said second rotor core section ( 7 ) and said third rotor core section ( 8 ) being annular in structure, and having an identical internal diameter, wherein said second rotor core section ( 7 ) is positioned between said first rotor core section ( 6 ) and said third rotor core section ( 8 ), wherein an external diameter of said second rotor core section ( 7 ) is smaller than an external diameter of said first rotor core section ( 6 ) and an external diameter of said third rotor core section ( 8 ), while said external diameter of said first rotor core section ( 6 ) is identical to that of said third rotor core section ( 8 ), said first rotor core section ( 6 ), said second rotor core section ( 7 ) and said third rotor core section ( 8 ) being eccentrically arranged to share a common central longitudinal axis, wherein a thickness of said first rotor core section ( 6 ) is identical to that of said first stator teeth section ( 3 ), while a thickness of said second rotor core section ( 7 ) is identical to that of said second stator teeth section ( 4 ), and a thickness of said third rotor core section ( 8 ) is identical to that of said third stator teeth section ( 5 ), wherein for each of said armature units, said first rotor core section ( 6 ), said second rotor core section ( 7 ), and said third rotor core section ( 8 ) of said rotor core are aligned with said corresponding first stator teeth section ( 3 ), said fourth stator teeth section ( 4 ), and said third stator teeth section ( 5 ) respectively, each of said first rotor core section ( 6 ) and said third rotor core section ( 8 ) further having k/2 magnet receiving slots longitudinally forming on an outer circumferential surface of said first rotor core section ( 6 ) and said third rotor core section ( 8 ), in such a manner that said k/2 magnet receiving slots of said first rotor core section ( 6 ) are evenly distributed along a circumferential direction thereof, while said k/2 magnet receiving slots of said third rotor core section ( 8 ) are evenly distributed along a circumferential direction thereof, wherein with respect to said longitudinal direction of said rotor, said magnet receiving slots of said first rotor core section ( 6 ) are arranged not to be aligned with said magnet receiving slots of said third rotor core section ( 8 ), said rotor permanent magnets ( 9 ) being received in said magnet receiving slots respectively, wherein each of said rotor permanent magnets ( 9 ) is elongated in shape and is arranged to create one of radial magnetization and parallel magnetization, said rotor permanent magnets ( 9 ) having identical direction of magnetization, so that a polarity of each pole of each of said rotor permanent magnets ( 9 ) with respect to said rotor is identical, wherein each of said rotor permanent magnets ( 9 ) has one of a N-pole and a S-pole facing toward said air gap formed between said rotor and said stator.