摘要
针对传统轴向磁通永磁同步发电机(AFPMSG)表贴式磁极采用均匀气隙产生非正弦气隙磁场引起发电机输出电压波动,使发电机输出电能质量变差问题,提出一种定子无铁芯轴向磁通阶梯形永磁同步发电机(AFSPMSG)结构,以提高发电机输出电能质量。建立阶梯型永磁体结构二维解析模型,采用分层模型法将磁场进行叠加,计算电机的气隙磁场、感应电动势、电磁转矩和效率,通过有限元验证解析法的有效性。根据气隙磁场中基波含量及反电动势波形畸变率选取最优的转子结构,优化后发电机反电动势THD为0.53%,比传统均匀气隙减少90%,能使发电机反电动势趋于标准正弦形,提高发电机输出电能质量。
For the problem that the output voltage of the generator can be changed by using the non-sinusoidal air-gap magnetic field of the traditional axial flux permanent magnet synchronous generator(AFPMSG)with surface rotor segments,a novel stator coreless axial-flux permanent magnet generator with step-shaped rotor segments was proposed in this paper. A 2 D analytical model with step-shaped rotor segments structure is established,the analytical solution for airgap magnetic fields,no-load EMF,electromagnetic torque,and efficiency are calculated by using the layered model method. The analytical method is verified through FEA. Then,FEA is used to optimize the structure of stepped permanent magnet,and the optimal rotor structure is selected according to the harmonic content in the air-gap magnetic field and the no-load back EMF distortion rate. The optimized generator no-load voltage THD was 0.53%,which is reduced by 90% compared with the traditional machine with surface rotor segments,the no-load EMF became standard sinusoidal,and improve the power quality of the generator.
作者
朱军
李少龙
宋丹丹
韩巧丽
封海潮
许孝卓
Zhu jun;Li Shaolong;Song Dandan;Han Qiaoli;Feng Haichao;Xu Xiaozhuo(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China;School of Energy and Transportation Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第11期3316-3323,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金（U1504506）
河南省重点研发与推广科技攻关项目（182102210052）
河南省高校基本科研业务费专项资金（NSFRF140115)
关键词
发电机
永磁体
解析模型
轴向磁通
阶梯型
有限元
磁场叠加计算
electric generators
permanent magnets
analytical models
axial-flux
step-shaped
finite element method
magnetic field superposition calculation
