Key technology of linear power generation device driven by wave energy

GUAN Zhaokang1, LIU Guijie2

（1.Electronics and Electrical Engineering College, Huazhong University of Science and Technology, Wuhan
430074, China;2.Engineering College, Ocean University of China, Qingdao 266100, China）

Abstract: Aiming at the problem of low efficiency of power generation due to the intermediate link conversion in the rotary wave power plant, focusing on the key technologies in the design of linear wave energy generating devices, using three-dimensional modeling techniques and Ansoft/Maxwell simulation software, optimization of the core slot size, magnet magnetization mode selection, magnet gap and core longitudinal end effect were studied and a linear wave power generation device was proposed. The electromagnetic transient simulation of the optimized linear generator model was carried out and then the electromagnetic torque curve, the flux curve and the induced electromotive force curve of the generator were obtained, which provide a theoretical basis for the design of linear wave energy generating device. The results indicate that NdFeB permanent magnet was chosen as the excitation source of this generator, which has the advantages of high power, good performance index, compact structure, low noise and high efficiency. The increase of the width of end core teeth can solve the problem of longitudinal edge effect.

Key words: wave power generation; linear motor; structural design; ansoft simulation analysis