用于波浪滑翔器的永磁直线发电机设计

Design of permanent magnet linear generator for wave glider

为提高波浪滑翔器发电机的持续供电能力,设计采用波浪能为波浪滑翔器供电的圆筒型永磁直线发电机,并采用有限元法分析其性能。研究表明:圆筒型永磁直线发电机的气隙磁通密度总谐波正弦畸变率为18.8%,电压的总谐波正弦畸变率为4.1%,发电机的磁场性能与空载特性良好,可为波浪滑翔器提供高品质的电能。随外电路等效负载的增大,直线发电机的输出效率逐渐提高,在等效负载为18Ω时,直线发电机既可满足波浪滑翔器的用电需求,又能保持最大输出效率为69.25%。

To improve the continuous power supply ability of wave glider generator,a tubular permanent magnet linear generator with wave energy is designed,and its performance is analyzed by finite element method.The research shows that the total harmonic distortion rate of the air gap magnetic density and the voltage for the tubular permanent magnet linear generator is 18.8%and 4.1%respectively.The generator designed in this paper has good magnetic field performance and no-load characteristics,which can provide high-quality electric energy for the wave glider.With the increase of the equivalent load of the external circuit,the output efficiency of the linear generator increases gradually.When the equivalent load is 18Ω,the linear generator can not only meet the power demand of the wave glider,but also maintain the maximum output efficiency at the value of 69.25%.