Axial-Flux Permanent Magnet Synchronous Generator for Float Buoy Type Wave Energy Converters

Nowadays floating electric power stations attracts a lot of researcher's attention. This paper discusses an axial-flux permanent magnet synchronous generator for using in float buoy type wave energy convertors of the stations. A distinctive feature of the generator for the floating electric power stations is the necessity of screening shells that protect the rotor and stator materials from the seawater penetration and corrosion. This affects the generator parameters through two ways: an increasing of the air gap and the magnetic reaction of eddy currents (in the case of the conducting shells). The exciting magnetic field that produced by PMs was calculated by FE method software. The results of this calculation allow to determine the effect of the increasing in the air gap, as well as the magnitude of the main harmonic of the excitation field. Moreover, an analytical assessment of the influence of eddy currents in the shells on the EMF of the generator had been developed.