Performance Analysis of N40 Permanent Magnet Using PMSLG for Wave Energy Conversion

Renewable energy is an upcoming source of energy accessible globally. Among the various sources of energy, ocean waves has the highest power density. Several models of wave energy converters (WEC) have been designed and developed to harness the potential power from the waves. Iron cores and permanent magnets (PM) are the main components of the translator in present linear generators. Due to electromagnetic and structural losses, the translator gets heated up and the temperature rises in both stator and translator core, thereby decreasing the output power. As a result, it has a detrimental influence on the overall performance of permanent magnet linear generator (PMLG). This paper presents the performance analysis of different rare earth permanent magnetic materials for two conditions: with and without steel as a translator’s material on the same temperature and enhance the output power of the linear generator. The finite element approach is carried out by Infolytica Magnet and considered parameters are magnetic flux linkage (MFL), magnetic field Intensity (MFI), torque, and voltage. The simulation results demonstrate that by using the steel core, the PMSLG with N40 NdFeB PM can provide an output voltage of 100 V at 0.35 Wb for the same operating temperature.