Abstarct: Wind energy is an increasing percentage of the energy supplied to the public electricity network. Chapter 1 gives a wide overview of wind turbine structures. Also, shows that transverse Flux permanent magnet machines offers a higher torque and power density which make them as promising choices for using in wind power generation systems. In chapter 2, the basic structure and operation of transverse flux permanent magnet machines are introduced and compared. An overview on important features of these machines are classified in detail. In chapter 3, baxsed on investigation of varies structures, a new simple structure with a quiet large torque density and high power factor is desined. FEM results show that this generator has high efficiency, high power factor and low power losses. Higher cogging torque is the main concerns in use of these generators in direct-drive applications especially in the types of generators used in small scaled wind turbine. In chapter 4, the 3D magnetic equivalent circuit of this generator is obtained to analysis the cogging torque effects. Then, numerical analysis baxsed on displacement of torque waveform is proposed in order to eliminate the major harmonic of cogging torque. By using skewing stator U-shaped cores, this displacement can be employed. In this regard, an optimum angle of skewing method for minimization of cogging torque is calculated by proposed geometric scheme. FEM results indicate that proposed methods used for calculation of skewed and shifted angle are an effective ways for remarkable minimization of total cogging torque. In chapter 5, the designed prototype is manufactured and tested in a laboratory. The measurement results are in agreement with FEM results.