Analytical design and optimization of flat-quasi linear generator for sea wave power plant in South Java Ocean

This paper aimed to find out a model of 1 kWp flat-quasi linear permanent magnet generator (LPMG) for ocean wave power plant in South Java Ocean. First, a flat-quasi LPMG is modeled based on the wave characteristic at the placement site. The model was then simulated using finite element software of FEMM 4.2. Next, the model was optimized to find out the optimum output power and cogging force. The optimization was performed by modifying pole's length and number but constant total translator length. The optimized model could generate up to 1,424.65 Wp (6% higher output power), with 38.85% lower cogging force than the initial model. The output power was maximum when the load resistance equals 1 Ω. Based on the configuration of the LPMG and wave characteristic, the generator generates power only in certain time. This is due to different size between the wave amplitude and the translation path length. Moreover, the average wave height would be directly proportional to the translation speed, induced voltage, and output power.