纯电动汽车动力系统效率特性试验研究与分析

以纯电动汽车动力系统能量转化关系为研究对象,提出了一套评价动力系统效率特性的方法和指标,搭建了测试平台,并利用该平台对某款纯电动汽车动力系统的效率特性进行了试验研究与分析。结果表明,该动力系统的实时能量输出效率与电池系统电压的关系拟合公式符合二阶多项式形式,并且与电机系统单点结果吻合度较好;另外,考虑到电池系统充放电能量转化效率的影响,该系统能量转化综合效率为73.0%,效率相对较低。以上试验结果为纯电动汽车动力系统产品匹配选型提供了基础数据支持。     

电动汽车动力系统关键技术研究

根据电动汽车满足于节能和减排的性能要求,从电池技术、驱动电机技术和控制系统技术三方面对电动汽车动力系统的关键技术进行了概述,总结了现有电动汽车动力系统关键技术的研究现状,指出了其发展趋势。     

以市场应用为研发导向——访上海大郡动力控制技术有限公司总裁徐性怡

他于1982年赴美留学,1990年获得威斯康辛大学电力电子及电机驱动专业博士学位。1992年至2002年期间在福特汽车公司担任技术专家、高级技术专家、部门经理,长期负责电动汽车用电机驱动系统开发工作。其间主持开发了电池电动汽车牵引电机控制系统、电动转向助力电机控制系统、混合电动汽车用集成启动发电机系统、燃料电池汽车用带辅助DC/DC电源的牵引电机系统、燃料电池用高速高压空气压缩机电机驱动系统等汽车用电机及其控制系统,此外还参与制定了越野车4轮驱动型混合电动车动力系统的选型设计     

东芝与大众合作电动车驱动系统

日本东芝公司与德国大众汽车公司已就合作开发电动汽车驱动系统达成一致,双方将共同开发电动车用马达及周边部件。东芝公司称,该公司已与大众在德国签署合作备忘录,共同开发电动汽车的动力系统和附属电子部件,双方还有意合作开发新一代电动车用高能源密度电池。     

汽车动力系统发展与节能技术

本文通过介绍汽车动力系统的发展,总结目前主要的动力系统以及动力系统的节能技术。包括发动机,混合动力汽车,电动汽车和燃料电池。着重以实际商用车为例,对各种动力系统进行说明。介绍了发动机的电控喷射技术、可变进气系统、柴油发动机电控共轨喷射技术。混合动力系统的构成形式。以及纯电动汽车的优劣。     

东南V5电动汽车动力驱动原理介绍

正纯电动汽车完全由动力蓄电池提供电力驱动,由于蓄电池普遍存在充电时间长、寿命短、外形尺寸和重量大等严重缺点,一直以来,电动汽车的市场较小。随着国家对新能源汽车的支持力度不断加大,相关政策、法规也不断完善,纯电动汽车普及得越来越广。本文将以东南V5电动汽车为例,介绍纯电动汽车的动力驱动及其控制原理。一、动力驱动完成部件1.电池系统架构电池系统基本结构如图1所示,动力电池系统包含地板下的     

纯电动汽车动力系统故障分析

随着新能源汽车的发展,纯电动汽车的市场保有量愈来愈高,随着而来的新能源汽车后服市场也逐渐新起。纯电动汽车动力系统是纯电动汽车的核心部件,包括能源系统和驱动系统两个大的子系统。能源系统的主要组成部分为动力电池和动力电池管理系统。驱动系统的主要组成部分为驱动电机及电机控制器。文章归纳总结了动力系统的故障现象,对现象进行故障等级和故障类型的划分。并选取了三个典型案例进行故障排除,为维修人员提供参考。     

基于Advisor的纯电动汽车动力性能仿真

在设计了以镍氢电池组和交流异步变频电机驱动的某纯电动汽车动力系统的基础上,利用Advisor车辆仿真软件建立了蓄电池、电动机及驱动系统和整车仿真模型.经过对该车整车动力性能仿真分析,表明该车动力系统设计方案是可行的.     

充电式混合动力电动汽车动力系统的参数匹配

针对充电式混合动力电动汽车(PHEV)典型的并联型结构,提出了对其动力系统中发动机功率、电机参数、传动系速比和电池参数等进行匹配的原则、步骤和实施方法.采用该方法对某中型轿车动力系统参数进行了匹配,并用电动汽车仿真软件ADVISOR对整车性能进行了仿真计算.仿真结果表明:该方法是可行和有效的.     

基于ADVISOR的电动汽车动力性能仿真分析

在某微型燃油汽车底盘基础上,设计以铅酸蓄电池组和无刷直流电动机驱动的电动汽车动力系统。利用ADVISOR仿真软件,建立蓄电池、电动机及驱动系统和整车仿真模型。经过对该车整车动力性能仿真分析,表明该车动力系统设计方案是实用、可行的。     

Three-speed transmission system for purely electric vehicles

This paper discusses the necessity of using a transmission system to improve the energy efficiency of purely electric vehicles (EVs). The energy efficiency of an electric motor varies at different operating points to meet the output power demand. The three gear ratios of a transmission system can maintain the motor speed within a stable region with relatively high energy efficiency, while various vehicle speeds are needed. This work is based on a light EV prototype. The optimized gear ratios of this transmission result in a considerably reduced energy consumption of 9.3% compared with conventional EVs with single-speed reducers under the condition of the Urban Dynamometer Driving Schedule driving cycle. Thus, the transmission system is necessary to improve the energy efficiency of EVs.     

纯电动客车动力系统参数匹配及性能分析

以纯电动客车为研究对象,对动力传动系统,主要对驱动电动机、变速器以及动力电池参数进行合理地计算和设计。为纯电动客车动力传动系统的初步选型提供依据。     

Urban driving cycle for performance evaluation of electric vehicles

Nowadays, a number of environmental issues have seriously come to the fore. For this reason, the R & D spending on eco-friendly vehicles that use electric power has been gradually increasing. In general, fuel economy and pollutant emissions of both conventional and eco-friendly vehicles are measured through chassis dynamometer tests that are performed on a variety of driving cycles before an actual driving test. There are a number of driving cycles that have been developed for the for performance evaluation of conventional vehicles. However, there is a lack of research into driving cycle for EV. Because large differences exist between the drive system and driving charateristics of EV and that of CV, a study on driving cycle for EV should be conducted. In this study, the necessity of an urban driving cycle for the performance evaluation of electric vehicles is confirmed by developing the driving cycle. First, the Gwacheon-city Urban Driving Cycle for Electric Vehicles (GUDC-EV) is developed by using driving data obtained through actual driving experiments and statistical analysis. Second, GUDC-EV is verified by constructing EV simulators and performing simulations that use the actual driving data. The simulation results are then compared against existing urban driving cycles, such as FTP-72, NEDC, and Japan 10–15. These results confirm that GUDC-EV can be used as an urban driving cycle to evaluate the performance of electric vehicles and validate the necessity of development of the driving cycle for electric vehicles.     

双转子混合动力系统研究

开发出一种以双转子电机为动力耦合器的混合动力系统。样机试验证明该系统能够实现混合动力汽车所要求的各项功能,而且制造成本低廉。其特点是:发动机独立于车轮运转,可始终在高效区工作;发动机的动力主要通过电磁力直接传给驱动桥,仅有少部分动力经过机械能—电能—机械能的转换,降低了能量转换过程中的损失;且该系统兼备无级变速器的功能。     

电动汽车动力性及续驶里程仿真研究

根据整车的性能参数及指标,进行了电动汽车动力系统的参数匹配计算。利用ADVISOR建立了整车及动力各部件的仿真模型,在不同工况下进行整车性能仿真,主要分析了动力性能、续驶里程及能量消耗,通过台架测试与仿真结果对比,两者基本吻合。在样车设计开发阶段,利用该方法进行研究,具有一定的参考价值和指导意义。     

纯电动汽车动力驱动系统电动机的选择方法之研究

本文首先介绍了电动汽车用电动机的基本性能,并从汽车行驶动力学出发建立了纯电动汽车用电动机性能参数的数学模型,其次探讨总结了对电动机基本特性参数的初步确定原则。最后以目前所要开发的一辆纯电动汽车的基本参数及目标性能要求为例,按以上原则确定出电动机参数并绘制符合要求的电动机性能曲线,为电动机的快速选择和后续车辆动力传动系统匹配优化提供了依据。     

Dynamics characteristics analysis and control of FWID EV

Compared with internal combustion engine (ICE) vehicles, four-wheel-independently-drive electric vehicles (FWID EV) have significant advantages, such as more controlled degree of freedom (DOF), higher energy efficiency and faster torque response of an electric motor. The influence of these advantages and other characteristics on vehicle dynamics control need to be evaluated in detail. This paper firstly analyzed the dynamics characteristics of FWID EV, including the feasible region of vehicle global force, the improvement of powertrain energy efficiency and the time-delays of electric motor torque in the direct yaw moment feedback control system. In this way, the influence of electric motor output power limit, road friction coefficient and the wheel torque response on the stability control, as well as the impact of motor idle loss on the torque distribution method were illustrated clearly. Then a vehicle dynamics control method based on the vehicle stability state was proposed. In normal driving condition, the powertrain energy efficiency can be improved by torque distribution between front and rear wheels. In extreme driving condition, the electric motors combined with the electro-hydraulic braking system were employed as actuators for direct yaw moment control. Simulation results show that dynamics control which take full advantages of the more controlled freedom and the motor torque response characteristics improve the vehicle stability better than the control based on the hydraulic braking system of conventional vehicle. Furthermore, some road tests in a real vehicle were conducted to evaluate the performance of proposed control method.     

电动汽车驱动系统再生制动特性分析与仿真

电动汽车行驶时对能量的需求以及延长续驶里程要求驱动电机具有再生制动能力,既可以提供制动力,又可以将制动过程中的能量回收。通过对汽车制动模式及其产生的能量进行分析。以永磁无刷直流电机系统在作电动汽车动力时实现电气制动为控制策略,仿真了回馈制动,并对仿真结果进行了分析、探讨。结果表明,再生制动的算法是可行的,能满足能量回收要求。     

Control strategy for clutch engagement during mode change of plug-in hybrid electric vehicle

The plug-in hybrid electric vehicle (PHEV) has various driving modes used in both internal combustion engine and electric motors. The EV mode uses only an electric motor and the HEV mode uses both an engine and an electric motor. Specifically, when the PHEV of a pre-transmission parallel hybrid structure performs mode changing, its engine clutch is either engaged or disengaged, which is important in terms of ride comfort. In this paper, to enhance the mode changing process for the clutch engagement, a PHEV performance simulator is developed using MATLAB/Simulink based on system dynamics and experiment data. Vehicle driving analysis is carried out of the control logic and properties of the mode changing. A compensated torque is applied during the mode change. This results in the rapid speed synchronization with the clutch although the trade-off relationship of the mode change. In addition, the mode changing is conducted through the transmission shifting process to rapidly synchronize with speed. The control strategy implemented in this study is shown to improve the drivability and energy efficiency of a PHEV.     

电动汽车轮毂电机车轮动力系统的研究

目前,电动汽车研制的难点之一是传统电动机的转矩不够大,不得不使用变速机械来满足电动汽车起动和爬大坡的大转矩需求。本技术方案就是使用高于传统电动机常规电压的宽范围系列阶梯电压来驱动特制的轮毂电机车轮动力系统,以彻底解决当前研制电动汽车的这一难点,从而使现代电动汽车能早日大量使用,造福于人类。