【作者】 赵静；

【导师】 郑萍；

【作者基本信息】 哈尔滨工业大学 ， 电气工程， 2007， 硕士

【摘要】 随着混合动力电动汽车蓬勃发展,混合动力系统逐渐成为人们研究的热点。混合动力系统一般可以分为串联式结构、并联式结构和混联式结构,混联式混合动力系统综合了串联式与并联式混合动力系统的优点并具有自己独特优势。本文所研究的轴向-轴向磁通复合结构永磁同步电机系统就是一种新颖混联式混合动力系统的核心部分,它的研究对混合动力电动汽车的环保和节能具有实际意义。首先,由于所研究的轴向-轴向磁通复合结构永磁同步电机是一种新型盘式电机,其气隙磁场为三维场,其仿真模型的建立要比二维模型更耗费时间和计算机硬件资源,因此研究了如何建立简单准确的三维仿真模型以节省计算时间和硬件资源。轴向-轴向磁通复合结构永磁同步电机由定子电机和双转子电机复合而成。分析了两电机的磁耦合问题,并从中找出了他们共用的永磁转子铁心厚度的选取原则;分析了两电机极数匹配问题,得出两电机最好采用相同极数以减小电机体积,降低两电机耦合。分析了电机静磁场特点。推导了永磁同步盘式电机的基本电磁关系,并与普通柱式电机的基本电磁关系进行了比较;研究了电机功率/体积、功率/重量和效率的主要影响因素,并把复合电机的功率/体积、功率/重量与一个单定子/单转子盘式电机比较,充分体现了复合结构电机的优势。最后,研究了极弧系数、斜极角度、阶梯形永磁体对电机转矩特性的影响,并对改善转矩特性效果明显的极弧系数与斜极两种方法进行优化匹配,得出转矩特性优化的方案。更多还原

【Abstract】 With the development of hybrid electric vehicles (HEVs), hybrid system is becoming the researching focus gradually. The power train system in HEV is basically divided into three types: serial, parallel and serial-parallel combined type. The serial-parallel combined hybrid system integrates the functions of the series and parallel system and has its unique advantage. The axial-axial flux compound-structure permanent-magnet synchronous machine is the key part of a novel serial-parallel combined hybrid system. For the environment protection and energy conservation, it is meaningful to research the axial-axial flux compound-structure permanent-magnet synchronous machine system.Firstly, as the axial-axial flux compound-structure permanent-magnet synchronous machine being a new type of disk machine, its air-gap magnetic field distributes in three-dimension. So its simulation model is more time consuming and has higher requirement for hardware than the two-dimensional model. So the three-dimensional simulation model is researched to save computing time and hardware resource.The axial-axial flux compound-structure permanent-magnet synchronous machine is integrated by stator machine and double rotor machine. The coupling between the two machines is analyzed, and the choice principle of the common rotor core is found. The pole-matching problem is researched, and it is concluded that the two machines had better to have the same pole numbers to reduce the volume and coupling between the two machines. The static magnetic field is researched also.The paper deduces the basic electromagnetic relationship of permanent-magnet synchronous disk machine, and compares it with that of ordinary column machine. The factors that influence the power per unit volume, power per unit mass and the efficiency are investigated. According to the contrast between the compound machine and a one-stator one-rotor disk machine, the predominance of the axial-axial flux compound-structure permanent-magnet synchronous machine is obvious.Lastly, pole-arc ratio, skewed magnet and ladder-magnet are researched to improve the torque characteristic. And the effect of pole-arc ratio and skewed magnet is satisfying. So the two methods are matched and optimized again, and the optimum scheme is obtained.更多还原