Analysis of a claw-pole synchronous machine for wind power conversion module

In small ratings, direct-driven wind power applications multiple permanent magnet generators have become very attractive. Connected directly to the turbine axis, this type of electrical machine contribute to low price energy (the energy loss is diminished through the conversion, the turbine performance is increased) and to the reduction of the noise - this would be a very important aspect in case the turbine is placed nearby the localities. The paper presents the analysis of the magnetic field, using a 3D finite element based software, in a claw-pole permanent magnet synchronous machine for small ratings, direct-driven wind power applications. Airgap magnetic field density distribution and harmonic content will be computed. A study on the influence of the axial length and armature material on the magnetic flux density in the machine will be presented.