风致涡激共振对永磁直线发电机电磁特性的影响  

Influence Analysis of Wind-Induced Vortex-Induced Resonance on Electromagnetic Characteristics of Permanent Magnet Linear Generator

作　　者：龚曙光[1] 蒋自强 谢桂兰[1] 张建平[1] 卢海山 GONG Shu-guang;JIANG Zi-qiang;XIE Gui-lan;ZHANG Jian-ping;LU Hai-shan(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学机械工程学院,湘潭411105

出　　处：《微特电机》2021年第10期1-6,共6页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51875493)。

摘　　要：基于风致涡激共振无叶片风力机的需要,研制了一台圆筒形永磁直线发电机,对其在匀速状态下的空载特性、负载特性进行了仿真分析,验证了该永磁直线发电机的可行性。采用反正切函数和正弦函数的乘积逼近发电机次级在共振时的运动轨迹,给出了输出电压的表达式,并探讨了发电机在不同风速和振幅下的电磁特性。结果表明,发电机在捕能柱共振区间(锁频区间)下能获得最大的电压、输出功率和效率,且随着次级运动振幅的增大,发电机的电压、输出功率和效率均增大,当其振幅倍数大于1后,发电机效率的增幅变缓。该结论可为无叶片风力发电机的研发提供指导。A cylindrical permanent magnet linear generator was developed based on the need of wind-induced vortex-induced resonance bladeless wind turbine.The no-load characteristics and load characteristics of the permanent magnet linear generator were simulated and analyzed,and its feasibility was verified.The product of arctangent function and sinusoidal function was used to approximate the motion trajectory of the generator at resonance,the expression of output voltage was given,and the electromagnetic characteristics of the generator at different wind speeds and the amplitudes were also discussed.The results showed that the generator can obtain the maximum voltage,output power and efficiency in the resonance region(locking frequency region)of the energy trap column,and the voltage,output power and efficiency of the generator increase with the increase of the amplitude of the secondary motion.When the amplitude ratio is greater than 1,the increase of the generator efficiency slows down.The conclusions could provide guidance for the research and development of bladeless wind turbines.

关 键 词：圆筒形永磁直线发电机 风致涡激共振 电磁特性 风速 振幅 无叶片风力机 

分 类 号：TM315[电气工程—电机] TM359.4