Outer Rotor PM Synchronous Generator for Household Wind Power Generation Comparative study upon structural solution

The paper presents an inquiry on the most appropriate solution for a wind-driven PM synchronous generator aimed for household applications. The structure, which has outer rotor, take into discussion the influence of stator geometry and mainly the type of stator winding. One uses ring coils (concentrated winding) placed either on stator yoke or stator teeth. For the latter solution, the fractional slot concept is taken into discussion. The study of the five proposed structures is a numerical one, which uses Finite Element Analysis as investigation tool.