【作者】 赵健；

【导师】 王铁成；

【作者基本信息】 哈尔滨工业大学 ， 电气工程及其自动化， 2013， 硕士

【摘要】 混合动力车作为新能源汽车的代表是解决当今石油枯竭问题以及城市环境污染的有效途径。全球范围内对混合动力车展开了广泛研究，混合动力车的核心部件起动发电机系统在众多研究中受到了广泛关注。永磁同步电机以其体积小和功率大的特点成为了起动发电机的最佳机种，也成为了应用于起动发电机系统的热点研究对象。本文以大功率混合动力公交车为背景，对应用于起动发电系统的永磁同步电机展开了研究。首先，针对整车的运行工况分析了每种工况下起动发电机的运行状态，并根据其运行状态和系统匹配关系制定了起动发电机的设计指标。而后，针对起动发电机系的传动结构进行了研究，提出了采用行星齿轮连接发动机与起动发电机的传动方式以提高系统的功率密度，深入分析了控制器损耗、系统功率密度与行星齿轮传动比之间的关系。其次，以提高电机转矩密度为目标，分析了影响电机转矩密度的因素，通过理论分析，得到了数学解析表达式，深入探讨了各项因素与电机转矩密度的函数关系，并根据电机指标对电机转矩密度进行了寻优设计。在此基础上总结了高转矩密度电机的设计流程，并通过仿真验证了其可行性。再次，以内嵌式永磁电机为研究对象，分析了永磁体放置与转子几何结构之间的关系。通过设置变量建立了电磁参数与转子几何结构之间的关系，进而研究了几何参数对电机气隙磁密、电感、磁阻转矩以及电机电压调整率的影响，得到了相应的关系曲线,并通过仿真进行了验证。最后，以电机输出转矩平稳性为研究目标，展开了对电机转矩波动的研究。从理论角度分析了电机转矩波动产生的原因及其影响因素，研究了各项因素与电机转矩波动之间的关系，分析了抑制转矩波动的方法，通过仿真验证了各种方法的效果，并得到了低转矩波动的电机设计方案。更多还原

【Abstract】 Hybrid vehicle, as the representative of new energy vehicles, provide aneffective way to solve today oil depletion problem and urban environment pollutionproblem.Widely worldwide research on hybrid cars and the core component thatnames starter generator system in hybrid cars has received the widespread attentionin numerous studies.PMSM becomes the best model of starter and generator withthe characteristics of small volume and big power and become the focus object ofstarting generator system study. This paper launches the research on PMSM used asthe starter and generator system based on the background of high power hybrid bus.Firstly, analysis of the starter and generator under each working conditionrunning state has been conducted in view of the vehicle operation condition, anddesign indexes were formulated according to the system matching and runningcondition. Then, transmission mechanism has been researched due to the startinggenerator system.Drive way using planetary gear connecting engine and starteinggenerator has been proposed to improve the power density of the system, and therelationship between the controller loss, system power dissipation density and planetgear transmission ratio is analyzed.Secondly, in order to improve the motor torque density, the factors that affectmotor torque density are analyzed, the mathematical analytic expression is obtainedthrough theoretical analysis. The various factors are thoroughly discussed asfunctions of motor torque density and the motor torque density optimization designhas been carried out according to the targets of motor. Design process of the hightorque density motor has been summarized on this basis, and its feasibility isverified by simulation.Thirdly, the relationship between the placement of Permanent magnets andgeometric structure has been analyzed taken the embedded type permanent magnetmotor on as the object of the research.The relationship between electromagneticparameters and the rotor geometry has been established by setting thevariables.Then geometrical parameters influence on the motor air gap flux density,inductance, magnetic resistance torque and motor voltage regulation rate are studiedto get the corresponding relation curve and the simulation validation has been done.Finally, the motor torque ripple research has been developed taken the motoroutput torque stability on as the object of the research.Causes and influencingfactors on motor torque ripple are analyzed from the perspective of theory and therelationship between various factors and motor torque ripple has been studied. Theeffect of various methods has been validated by computer simulation and the designscheme of low torque ripple motor has been got.更多还原