Based on the fractional slot concentrated winding (FSCW) permanent magnet motor, the stator modular transformation is carried out, and four different stator modular structures are designed, including non-magnetic isolation type (T type, yoke separation type) and magnetic isolation type (E type, C type). At the same time, two new tooth tip structures in which winding teeth and non-winding teeth do not have tooth tips simultaneously are designed. The corresponding finite element motor model is established, and the effect of stator modularization and tooth tip structure on the performance of the FSCW permanent magnet motor is studied. The simulation results show that the suitable stator gap of the modular structure permanent magnet motor can reduce the cogging torque. The 12-slot 10-pole motor adopting the structure of winding teeth with tooth tips has better motor performance than the other structures.