Abstarct: High torque and power density, good flux attenuation capability, sinusoidal induced voltage waveform, strength, and simplicity in structure are some of the advantages of flux-switching permanent magnet (FSPM) machines. Achieving the maximum torque is one of the important design parameters of the motor used in the electric vehicle (EV). On the other hand, the axial field flux switching permanent magnet (AFFSPM) machine has a higher torque density than the radial flux machine. Therefore, the FSPM machine can be a suitable option for EV applications. While the most suitable structure for the use of EVs has not yet been provided. In this regard, three structures of dual-stator axial field flux-switching permanent magnet (DSAFFSPM) motors are introduced and completely compared baxsed on torque density, power density, and efficiency to choose the most suitable structure for EV application. On the other hand, flux density in this doubly salient structure causes cogging torque and torque ripple to be larger than in other common permanent magnet (PM) machines. Therefore, there is a need for an AFFSPM machine that combines all the mentioned advantages while also having low torque ripple and cogging torque. To enhance the benefits of the dual stator structure with an ISTR, a motor with a new and improved design is proposed. In the new structure, a technique has been implemented that can be implemented on the ISTR structure or any axial-flux permanent magnet (AFPM) structure for high torque density and low cost. This structure shows that it has high power density, low vibration, and noise due to the torque ripple and cogging torque being less. Analytical methods presented in FSPM machines mostly consider the vertical part of the flux density. One of the presented analytical methods is the 3-D magnetic equivalent circuit (MEC)method, which is time-consuming due to the creation of deviation and nonlinear problems. Therefore, fast analytical modeling on the structure of dual stators with an ISTR topology and a new structure to achieve the vertical and tangential part of the flux density and the influence of the parameters on the optimization of the motor are presented and investigated. Analytical Modeling innovations (i) deriving a 2-D composite analytical model, (ii) modeling the PMs in the bore of the stator body, and (c) placing the rotor teeth with some virtual surface currents (VSCs). Finally, multi-objective optimization is used to achieve optimal size and improve new motor performance. The characteristics of the new motor are analyzed at each stage using the 3-D finite element method (3-D FEM) and analytical results. A comparative study has been done to prove the superior performance of optimized structure indicators. As a result, the new optimized structure is specifically designed and proposed for EV applications, providing high torque density, high efficiency, and low cost. It also has lower thermal stress and core loss.