Abstarct: Accurate estimation of losses, correct thermal analysis, and designing an effective cooling system are of great importance for a Claw Pole Transverse Flux Permanent Magnet (TFPM) machine, as a high efficiency motor showing highest power and torque densities compared to those provided by conventional and emerging converter-fed machines. In this thesis, a 500 kW Claw Pole TFPM synchronous motor is selected as the case study. This motor, which rotates at 300 rpm, is fed by a battery bank with a DC lixnk voltage of 220 V. Considering the weaknesses of extracted algorithms from references, design and optimization of this motor is carried out by using a new design algorithm. Losses distribution at open circuit and full load conditions will be obtained by using Finite Element Analysis (FEA). Core losses, the dominant part of motor losses, are estimated by a method baxsed on the Steinmetz equation and by using loss curves of core material. Copper losses of stator windings and permanent magnets losses are determined using Ampere’s law. Considering the worst case scenario, temperature distribution inside the motor at natural convection condition is obtained by using the combination of the heat equivalent circuit and finite element method (FEM). According to the results of this simulation, to prevent any thermal damage to the motor, water jacket is proposed as the proper and efficient cooling system. After presenting a comprehensive design algorithm for the water jacket, this cooling system and its circulating pump are designed.