一种新型混合励磁爪极发电机的建模和计算

THE MODELING AND CALCULATING ON A NEW TYPE HYBRID CLAW-POLE ALTERNATOR

提出了一种具有混合励磁结构的爪极发电机的原理和模型。混合励磁爪极发电机是由永磁体和励磁线圈共同产生电机磁场的一种发电机,较之传统的电励磁爪极发电机,具有效率高、电机低速性能好、集线圈励磁的电压调节性能和高功率密度的优点,具有很好的研究前景和使用价值。但是,长期以来由于其结构和磁路的复杂、不规则性,又是典型的三维磁场特性,国内外对于这种新型电机的专题研究尚缺乏理论上的系统分析,文章和论著都较少。该文采用经典的从磁通管方法入手的等效磁网络法结合有限元法,通过分析、计算电机各部分磁导,构成爪极电机的三维等效磁网络,并采用三维有限元法计算了电机的自感,给出了相关的计算结果,以供设计人员参考。

The Hybrid claw-pole alternators have magnetic fields contributed by permanent magnet and excitation coil and the advantages are high efficiency, good low-speed characteristics, excitation adjustable and high flux densities. For the reason of complex claw-pole construction and 3-D magnetic fields, there is lack of the research on the alternators. In this paper, magnetic-equivalent-circuit method based on flux tubes is introduced and the reluctance network is set up. Finally, the results obtained by MEC and FEM are compared and can be helpful to the design.