摘要:圆筒型永磁直线发电机(TPMLG)广泛应用于直驱式波浪能发电装置中以提能量转化效率,但由边端力、齿槽力等引起的磁阻力波动是影响永磁直线发电机运动性能及整个能量装置稳定性的主要因素。首先运用傅里叶级数与数值分析相结合的方法对TPMLG边端力进行分析,提出优化动子长度降低边端力的原理与方法;其次,在旋转电机磁场能量计算方法的基础上对TPMLG齿槽力的计算公式进行推导,得到TPMLG齿槽力波动统一公式;最后采用有限元方法(FEM)建立PMLG 磁阻力分析模型,在电机不同槽距与极距的匹配情况下,对电机的磁阻力进行仿真分析与验证,得到电机的槽距和极距的最优尺寸。优化理论及仿真分析方法可以指导TPMLG的设计与研究。
关键词:圆筒型永磁直线电机;磁阻力;有限元;波浪发电 Abstract: Tubular permanent magnet Linear Generator (TPMLG) is widely used in directdrive wave energy conversion, but detent force ripple such as end effect force, cogging force is the key factor which affected the properties of TPMLG and the conversion. Firstly, end effect force in TPMLG was analyzed by the method of Fourier Series and numeric analysis. Secondly, basic on the rotating electrical machine characteristics, the coenergy method was implemented to derive the cogging force equation. Lastly, the 2D finite element method (FEM) was implemented to investigate the detent force and the optimized structure of slot pitch and Pole pitch was obtained. The optimization method and simulation analysis method can be used for design and research of TPMLG. Key words: tubular permanent magnet linear generator (TPMLG), detent force, optimization
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