Modular stator structure, design method and homopolar and same-slot permanent magnet motor

The invention discloses a modular stator structure which is used for a homopolar and same-slot permanent magnet motor. The modular stator structure comprises stator tooth parts and an annular stator yoke part, the inner circumferential surface of the stator yoke part is provided with a plurality of assembly slots along the circumferential direction, and each assembly slot is internally and detachably provided with one stator tooth part. The same-pole and same-slot permanent magnet motor adopts different pole slots for cooperation, slot pitch angles of each type of pole slots are different, but the slot pitch angles are integral multiples of slot included angles of virtual positioning slots uniformly and annularly distributed on the inner circumferential surface of a stator yoke part, the number of the virtual positioning grooves is the product of the number of pole pairs of the same-pole and same-groove permanent magnet motor and the number of assembling grooves. The invention further discloses a design metho