【摘 要】
：
针对电动汽车车身阶次振动和车内噪声的主要振源—永磁同步电机的转矩波动,首先通过转矩测量试验测得了电机24阶以内的动态、高阶转矩信号,分析与揭示了永磁同步电机转矩信号
【机 构】
：
同济大学新能源汽车工程中心,上海燃料电池汽车动力系统有限公司
论文部分内容阅读
针对电动汽车车身阶次振动和车内噪声的主要振源—永磁同步电机的转矩波动,首先通过转矩测量试验测得了电机24阶以内的动态、高阶转矩信号,分析与揭示了永磁同步电机转矩信号的阶次特性现象；为解释该试验现象,从理论上建立了一种考虑非正弦永磁磁场分布、开槽、时间谐波电流的永磁同步电机转矩波动数学模型,获得了谐波转矩的解析解,预测了转矩波动的阶次与频率,进而提出了试验测量动态、高阶转矩信号的转速判据.试验研究和理论研究表明:永磁同步电机的转矩具有明显的阶次波动特征,主要阶次有h-1、2(h-1)、6i+h-1、6i-h+l阶(h∈N,且由变频器决定；i∈N)；h次时间谐波电流将单独引起h-1、2(h-1)阶的转矩波动,h次时间谐波电流、非正弦永磁磁场分布、开槽将共同引起6i+h-1、6i-h+1阶的转矩波动.
其他文献
为了准确简便地预测路堤在荷载下发生的沉降变形,必须对桩基复合地基的桩土应力比进行合理正确的评价计算.针对高速公路地基处理中采用刚性桩复合地基的情况,假设路堤土中基
The thrust hydraulic system of the prototype shield machine with pressure and flow compound control scheme was introduced. The experimental system integrated wi
A methodology was presented relating the microstructure of asphalt mixtures to their damage behavior. Digital image techniques were used to capture the asphalt
Using a differential form of the potential energy function and taking the effect of work applied by external force in far field into account, the mechanism of s
The activated carbon with high surface area was prepared by KOH activation. It was further modified by H2SO4 and HNO3 to introduce more surface functional group
基于Petri网模糊推理算法,引入改进粒子群优化算法,使其具有参数学习能力,摆脱系统中众多未知参数对专家和经验的依赖.以舰船航空保障系统为研究对象,建立了基于具有学习能力
Pin and socket contacts are the key parts of electrical connector as aerospace electronic components. The contacts are also the direct carriers for signal trans
The material structure of laminated vibration damping steel sheet(LVDSS) was introduced in detail. An interface cohesive model between the skin sheets was devel
The 18%Ni alloy steels provide high strength and toughness, while age-hardenable or PH stainless steels also have good corrosion resistance. This paper focuses
针对传统比例–积分(proportional-integral,PI)反馈控制器应用于动态电压恢复器时存在稳态误差较大、负载适应性差、难以对非线性负载进行电压补偿等问题,提出一种任意负载