摘要
为了解决低压大电流车载发电机换向困难和火花等级高的问题,设计出一种采用非均布和不对称磁极结构,加装不对称换向极,嵌入具有均压作用的单波绕组并安装了倾斜电刷的新型电机.对电机进行有限元电磁场分析,结果表明:尽管主磁极是不等距分布的,但是气隙磁场仍然是对称均布的,确保提供适合机电能量转换的媒介空间;对换向区磁场的精细化分析和展示表明:换向极起到了降低换向区磁感应强度和换向电势的作用,换向电势平均减少58.11%,益于改善换向.火花实验说明火花等级低于1.25级.设计方案可以改善发电机换向条件和降低火花等级,有利于提高车载电气系统运行稳定性和可靠性.
In order to solve the problem of difficult commutation and high spark level for low-voltage high-current vehicle generator, a novel generator adopting the inhomogenously distributed and asymmetric magnetic pole structure, adasymmetric commutating pole, single wave windings with the function of voltage equalization as well as oblique electric brush was designed. The finite element electrical magnetic field analysis was performed for the designed generator. The results show that although the main magnetic poles distribute with unequal distance, the distribution of air-gap magnetic field is still symmetric, which ensures to provide the medium space suitable for the mechanical and electrical energy conversion. The elaborated analysis and display on the magnetic field of commutating zone show that the commutating pole plays a role in decreasing the magnetic induction and commutating potential in commutating zone. In addition, the commutating potential averagely reduces by 58.11%, which is beneficial for improving the commutation. The spark experiment shows that the spark level is lower than 1.25. The designed scheme can improve the commutating conditions of generator, decrease the spark level, and be beneficial for enhancing the running stability and reliability of electrical system on vehicle.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2013年第1期12-17,共6页
Journal of Shenyang University of Technology
基金
辽宁省科技计划资助项目(2010220011)
沈阳市科技计划资助项目(F11-190-7-00)
关键词
车载发电机
车载电器
换向区磁场
换向电势
电磁场
火花等级
非对称磁极
气隙磁场
vehicle generator
electrical appliance on vehicle
magnetic field of commutating zone
commutating potential
electrical magnetic field
spark level
asymmetric magnetic pole
air-gap magnetic field
