This paper presents a quick and reliable methodology for machine designing. The methodology is based on reluctance network and applied to design three phase axial flux machines. The modeled reluctance network allows taking into account nonlinear operating conditions. It is solved by computing meshes' magnetic flux and the network topology is updated for each rotor position. Therefore, a number of steady state steps are considered to simulate machine's rotation. At first the modeling methodology is presented. The models are validated in linear and nonlinear mode by means of a 2D finite element software, experimental validation of a machine is presented, and finally the sizing of the machines on a driving cycle in linear mode is carried out.