electric vehicles

电动汽车
  • 文章类型: Journal Article
    电动汽车(EV)与其内燃机(ICE)同行有很大不同,减少机械零件,锂离子电池以及踏板和变速器控制的差异。车辆操作的这些差异,再加上电动汽车在我们道路上的扩散,保证对电动汽车的不同风险状况和驾驶行为进行深入调查,杂种(HYB)和ICE。在这项独特的研究中,我们分析了荷兰14,642辆汽车的新型远程信息处理数据集,并附有事故索赔数据。我们训练了一个Logistic回归模型来预测司机过失索赔的发生,有过错的索赔是指驾驶员有过错的第一方和第三方损害赔偿。我们的结果表明,尽管平均行驶里程较低,但EV驾驶员比ICE驾驶员更容易遭受过失索赔。此外,我们调查了这些错误索赔可能性增加的财务影响,发现与ICE相比,电动汽车的第一方损害成本显著增加了6.7%.在分析驾驶员行为时,我们发现电动汽车和HYB记录更少的刺耳加速度,制动,转弯和超速事件比ICE。然而,这些减少的恶劣事件并不能转化为降低电动汽车的索赔频率。这项研究发现,电动汽车引起的事故频率更高。监管机构应明确考虑这一负担,制造商,企业和公众在评估过渡到替代燃料汽车的成本时。
    Electric vehicles (EVs) differ significantly from their internal combustion engine (ICE) counterparts, with reduced mechanical parts, Lithium-ion batteries and differences in pedal and transmission control. These differences in vehicle operation, coupled with the proliferation of EVs on our roads, warrant an in-depth investigation into the divergent risk profiles and driving behaviour of EVs, Hybrids (HYB) and ICEs. In this unique study, we analyze a novel telematics dataset of 14,642 vehicles in the Netherlands accompanied by accident claims data. We train a Logistic Regression model to predict the occurrence of driver at-fault claims, where an at-fault claim refers to First and Third Party damages where the driver was at fault. Our results reveal that EV drivers are more exposed to incurring at-fault claims than ICE drivers despite their lower average mileage. Additionally, we investigate the financial implications of these increased at-fault claims likelihoods and have found that EVs experience a 6.7% increase in significant first-party damage costs compared to ICE. When analyzing driver behaviour, we found that EVs and HYBs record fewer harsh acceleration, braking, cornering and speeding events than ICE. However, these reduced harsh events do not translate to reducing claims frequency for EVs. This research finds evidence of a higher frequency of accidents caused by Electric Vehicles. This burden should be considered explicitly by regulators, manufacturers, businesses and the general public when evaluating the cost of transitioning to alternative fuel vehicles.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    全球运输电气化商业部门正在蓬勃发展。利益相关者越来越关注将电动汽车和电动公交车整合到交通网络中。因此,迫切需要投资公共充电基础设施,特别是快速充电设施。因此,并完成绿色环境的投资组合,这些快速充电站(FCS)使用100%的可再生能源(RES)设计。因此,本文提出了一种用于FCS的技术经济评估的优化模型,该FCS包括具有各种储能设备(ESD)的光伏和风力涡轮机。在这方面,由于其高功率密度和充电/放电周期和速率,使用飞轮和超级电容器评估FCS性能。然后,考虑到不同的技术和经济关键性能指标,可以实现这些分布式发电机的最佳尺寸。之后,通过调查RES的不确定性对FCS组件选择标准的影响,问题变得更加复杂,设计和容量。最终,作为致力于在线能源管理方法的一项努力,实现了基于径向基网络(RBN)的深度学习方法,已验证,并进行了。与传统的优化方法形成鲜明对比的是,RBN通过在相对较短的时间内获得最佳解决方案来证明其优越性。
    The global transportation electrification commerce sector is now booming. Stakeholders are paying an increased attention to the integration of electric vehicles and electric buses into  the transportation networks. As a result, there is an urgent need to invest in public charging infrastructure, particularly for fast charging facilities. Consequently, and to complete the portfolio of the green environment, these fast-charging stations (FCSs) are designed using 100% of renewable energy sources (RESs). Thus, this paper proposes an optimization model for the techno-economic assessment of FCSs comprising photovoltaic and wind turbines with various energy storage devices (ESDs). In this regard, the FCS performance is evaluated using flywheels and super capacitors due to their high-power density and charging/discharging cycles and rates. Then, optimal sizing of these distributed generators is attained considering diverse technical and economical key performance indicators. Afterwards, the problem gets more sophisticated by investigating the effect of RES\'s uncertainties on the selection criterion of the FCS\'s components, design and capacity. Eventually, as an effort dedicated to an online energy management approach, a deep learning methodology based on radial basis network (RBN) is implemented, validated, and carried out. In stark contrast to conventional optimization approaches, RBN demonstrates its superiority by obtaining the optimum solutions in a relatively short amount of time.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    电动汽车(EV)的兴起需要能够提供类似于传统车辆的加油体验的高效充电基础设施。极端快速充电(EFC)的创新在这方面提供了有前途的解决方案。通过利用可再生能源和使用复杂的多端口转换器,EFC系统可以满足不断发展的电动汽车加油需求。单级拓扑简化了转换器设计,专注于高效的DC-AC转换,对于将太阳能送入电网或充电站至关重要。它提供功率因数校正,谐波滤波,并减轻电能质量问题,确保稳定和高效的运营。具有最大功率点跟踪(MPPT)功能的转换器促进了太阳能光伏系统在充电站中的有效集成,确保电动汽车充电的最大太阳能利用率。在不同模式下运行的能力允许与储能系统无缝集成,储存多余的太阳能供夜间或需求高峰期使用,提高整体效率和可靠性。先进的转换器支持双向能量流,使电动汽车电池能够放电回电网,协助电网稳定和能源管理。然而,需要鲁棒的控制算法来更有效地处理动态条件,如局部阴影。我们的审查重点是将可再生能源与多端口转换器集成,提供对针对EFC拓扑优化的新型电动汽车充电站框架的见解。我们强调了多端口非隔离转换器相对于传统线路频率变压器的优势,特别是在中压情况下,为EFC应用提供增强的效率和多功能性。
    The rise of electric vehicles (EVs) necessitates an efficient charging infrastructure capable of delivering a refueling experience akin to conventional vehicles. Innovations in Extreme Fast Charging (EFC) offer promising solutions in this regard. By harnessing renewable energy sources and employing sophisticated multiport converters, EFC systems can meet the evolving demands of EV refueling. A single-stage topology simplifies the converter design, focusing on efficient DC-AC conversion, vital for feeding solar power into the grid or charging stations. It provides power factor correction, harmonics filtering, and mitigates power quality issues, ensuring stable and efficient operations. Converters with Maximum Power Point Tracking (MPPT) capability facilitate the efficient integration of solar PV systems in charging stations, ensuring maximum solar energy utilization for EV charging. The ability to operate in different modes allows seamless integration with energy storage systems, storing excess solar energy for use during night-time or peak demand periods, enhancing overall efficiency and reliability. Advanced converters support bidirectional energy flow, enabling EV batteries to discharge back to the grid, aiding grid stability and energy management. However, robust control algorithms are needed to handle dynamic conditions like partial shading more effectively. Our review focuses on integrating renewable energy sources with multiport converters, providing insights into a novel EV charging station framework optimized for EFC topology. We highlight the advantages of multiport non-isolated converters over traditional line frequency transformers, particularly in medium voltage scenarios, offering enhanced efficiency and versatility for EFC applications.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    本文提出了一种数学优化框架,用于在道路网络中战略放置准动态无线充电(QWC)站,以满足电池电动公交车(BEB)的充电需求。本研究评估了两种为公交车供电的方案。在第一种情况下,考虑了并网系统。优化旨在最大限度地减少与资本相关的年度成本,操作,以及电动巴士车队的能量损失。这涉及确定QWC站的最佳位置,功率发射器的长度,以及BEB的相应电池容量。使用基于MATLAB的优化工具Casadi和Yalmip,用解算器Bonmin和Fmincon,最佳配置包括13千瓦时的电池容量和分布在五个公交车站区域的300米电力发射器。第二种情况对隔离的太阳能光伏(PV)和电池储能系统(BESS)采用机会约束优化方法。该系统旨在可靠地满足BEB的全天能量需求,考虑不同的季节性数据(冬季,夏天,所有季节/全年)。光伏和BESS容量的优化结果随季节而变化:使用夏季数据得出394.247kW和2012.6kWh,使用冬季数据的1762.1kW和2738.2kWh,使用全年数据,分别为1610.8千瓦和2741.9千瓦时。此外,本文以阿联酋哈利法市和阿布扎比市中心之间的公交路线为例,研究了不同公交车队规模对最佳电池规模和功率发射器组合的影响。研究结果表明,对于较小的车队来说,具有较少或没有充电站的较大电池更经济。相反,随着舰队规模的增加,更小的电池尺寸和更大数量(和长度)的QWC(功率发射器)的组合变得更具成本效益。这项研究为QWC站的有效部署以及可再生能源和储能的可持续城市电动公交车网络的整合提供了重要的见解。提出的优化模型为设计和运营充电基础设施提供了一种系统的方法,促进可持续的城市交通系统。此外,这项研究强调了季节性数据对光伏系统规模和成本的影响。
    This paper presents a mathematical optimization framework for the strategic placement of quasi-dynamic wireless charging (QWC) stations within road networks to address the charging needs of battery electric buses (BEBs). This study evaluates two scenarios for powering the buses. In the first scenario, a grid-connected system is considered. The optimization aims to minimize annual costs related to capital, operation, and energy losses of the electric bus fleet. This involves determining the optimal locations for QWC stations, the length of power transmitters, and the corresponding battery capacities for the BEBs. Using MATLAB-based optimization tools Casadi and Yalmip, with solvers Bonmin and Fmincon, the optimal configuration includes a 13 kWh battery capacity and a 300 m power transmitter distributed across five bus stop areas. The second scenario employs a chance-constrained optimization approach for an isolated solar photovoltaic (PV) and battery energy storage system (BESS). This system is designed to reliably meet the BEBs\' energy requirements throughout the day, considering different seasonal data (winter, summer, all seasons/year-round). The optimization results for the PV and BESS capacities vary with the seasons: 394.247 kW and 2012.6 kWh using summer data, 1762.1 kW and 2738.2 kWh using winter data, and 1610.8 kW and 2741.9 kWh using year-round data. Additionally, the paper examines the impact of varying bus fleet sizes on the optimal battery size and power transmitter combination using a real-world example of the bus route between Khalifa City and Abu Dhabi Downtown in the UAE. The findings suggest that larger batteries with fewer or no charging stations are more economical for smaller fleets. Conversely, as the fleet size increases, a combination of smaller battery sizes and a greater number (and length) of QWC (power transmitters) becomes more cost-effective. This research offers significant insights into the efficient deployment of QWC stations and the integration of renewable energy and energy storage for sustainable urban electric bus networks. The proposed optimization models provide a systematic approach to designing and operating charging infrastructure, contributing to sustainable urban transportation systems. Moreover, the study highlights the influence of seasonal data on PV system sizing and costs.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    具有显著增益的高功率转换器代表既定的配置,在工业和商业部门的应用中具有吸引力,例如燃料电池电动汽车(FCEV),能源备用系统,和汽车前照灯。现有文献主要以采用单占空比的拓扑为特征。然而,这种奇异的方法对于高占空比的操作可能不可靠,需要加入额外的元件以提高电压增益。为了解决这个问题,当前的研究在高增益非隔离DC-DC转换器的背景下引入了分时的概念。这种创新的方法实现了更高的输出电压增益,大约是输入电压的13.33倍。从各个角度对所提出的转换器进行了分析。最后,它在MATLAB/Simulink环境中进行检查,在理论分析得到验证的地方,效率达到97.4%。
    High-power converters with significant gains represent established configurations that hold appeal for applications in the industrial and commercial sectors, such as fuel cell electric vehicles (FCEV), energy backup systems, and automotive headlamps. Existing literature predominantly features topologies employing a single-duty ratio. However, this singular approach may not be dependable for operations with high-duty cycles, necessitating the incorporation of additional components to enhance voltage gain. To address this, the current study introduces the concept of time-sharing within the context of a high-gain non-isolated DC-DC converter. This innovative approach achieves substantially higher output voltage gains, approximately 13.33 times that of the input voltage. The analysis of the proposed converter is approached from various perspectives. Finally, it is examined within the MATLAB/Simulink environment, where the theoretical analysis is validated, and an efficiency of 97.4% is achieved.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    本文介绍了双定子(DS)混合励磁(HE)Halbach永磁(HPM)磁通切换(FS)机。研究了专门为电动汽车(EV)/混合动力电动汽车(HEV)牵引应用设计的机械结构及其优化。使用多目标遗传算法的优化是在基于灵敏度分析的关键优化参数和约束的识别之后进行的。将有限元结果与具有相同PM体积和绕组电流密度的最先进的基准FSPM电机的性能进行比较。所提出的设计表现优于基准,反电动势增加16.2%,齿槽转矩减少14.7%。此外,在磁通增强运行时,平均转矩提高了20.8%,转矩脉动降低了9.9%。值得注意的是,所提出的机器还能够进行通量调节,从而具有在宽的速度范围内操作的能力。提供了对所提出的机器结构进行重大改进的原因的详细解释,以全面了解其基本原理。这些研究结果表明,这种创新的DS-HE-HPM-FS机器可以提高电动汽车和混合动力汽车的性能。
    This research paper introduces the Double Stator (DS) Hybrid Excitation (HE) Halbach Permanent Magnet (HPM) Flux Switching (FS) machine. The machine construction and its optimization specifically designed for electric vehicle (EV)/hybrid electric vehicle (HEV) traction applications are investigated. The optimization using a multi-objective Genetic Algorithm is conducted following a sensitivity analysis-based identification of key optimization parameters and constraints. The finite element results are compared with the performance of a state-of-the-art benchmark FSPM machine having identical PM volume and winding current densities. The proposed design is shown to outperform the benchmark with 16.2% increase in back-electromotive force and 14.7% reduction in cogging torque. Furthermore, the average torque is improved at flux-enhancing operation by 20.8%, and the torque ripple is reduced by 9.9%. Notably, the proposed machine also is capable of flux regulation thereby having the ability to operate in a wide speed range. A detailed explanation of the reasons for the significant improvements in the proposed machine structure is provided to offer a comprehensive understanding of its rationale. These research findings indicate that this innovative DS-HE-HPM-FS machine can enhance the performance of EVs and HEVs.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    由于车载控制和诊断系统中有大量不同的传感器,因此将最新车辆转换为测量系统是一项有益的任务。这些过程不是由单个控制单元执行的;有必要在通信网络上共享信号值,可以连接外部设备以记录真实流量。本文旨在将这些记录数据用于1自由度纵向车辆和动力总成模型验证。为了可重复性,选择三条城市路线:平原公路,较小的道路等级,和更高的道路等级在两个方向。因此,传动系统在高负载范围内进行测试,即使长期休养。用DGPS系统记录高度变化。通过记录的测量,车辆和动力传动系统模型可以校准,例如空气阻力参数,滚动阻力,以及传动系统的效率。为速度跟踪定义了验证标准,累积能量的相对公差应低于10%。在一天结束的时候,已开发的模型已准备好进行能量分析或控制策略设计。还提出了应用循环的能量平衡来证明这一点。
    Transforming an up-to-date vehicle into a measurement system is a rewarding task due to the large number of different sensors in the onboard control and diagnostic systems. These procedures are not performed by a single control unit; it is necessary to share the signal values over a communication network, to which an external device can be connected to record the real traffic. The paper aims to use these recorded data for 1 DOF longitudinal vehicle and powertrain model validation. For repeatability, three city routes are selected: plain road, smaller road grade, and higher road grade in both directions. Therefore, the drivetrain system is tested in a high load range, even with long-term recuperation. The altitude changes are recorded with a DGPS system. By the recorded measurements, the vehicle and the drivetrain model can be calibrated, such as the air drag parameters, the rolling resistances, and the efficiencies of the drivetrain. The validation criteria are defined for speed tracking, and the relative tolerance of the cumulated energy should be below 10%. At the end of the day, a developed model is ready for energetic analysis or control strategy design. The energy balance of the applied cycles is also presented to prove that.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    我研究了电池电动汽车(BEV)的使用和所有权特征,对客运电气化具有根本意义。使用覆盖纽约整个BEV人口的数据,我量化了BEV里程和用电量,并强调了车辆利用率在造成现实世界污染损害及其空间变化方面的重要作用。然后,我研究了影响BEV驱动量的因素,重点是估计BEV里程的电价弹性。了解驾驶员如何应对运营成本的这些变化可能有助于调整BEV驾驶的社会和私人成本,并说明电力公司如何影响未来的运输结果。我发现住宅电价上涨10%会使里程减少1%,但随着公共充电站——价格通常与电力成本脱钩——变得可用,响应能力下降。
    I study battery electric vehicle (BEV) usage and ownership characteristics with fundamental implications for the electrification of passenger transportation. Using data covering the entire BEV population in New York, I quantify BEV mileage and electricity consumption and highlight the important role of vehicle utilization in contributing to real-world pollution damages and their spatial variation. I then study the factors influencing how much BEVs are driven with a focus on estimating the electricity price elasticity of BEV mileage. Understanding how drivers respond to these changes in operating costs may help align the social and private costs of BEV driving and illustrates how electric utilities may affect transportation outcomes in the future. I find a 10% increase in residential electricity prices reduces mileage by 1%, but responsiveness falls as public charging stations-where prices are often decoupled from electricity costs-become available.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    随着人口老龄化和心血管疾病的高度流行,佩戴心脏起搏器的人数逐渐增加。起搏器佩戴者的安全是非常重要的问题,因为他们必须确保设备在各种生活场景中正常工作。由于各国低碳出行政策的逐步推广,电动汽车已成为使用最频繁的出行工具之一。由于在车辆内部集成了许多高功率电气装置,所以在驾驶期间车辆内部的电磁环境非常复杂。为了保证这个群体的安全,本文以佩戴心脏起搏器的乘客为对象,以电动汽车驱动电机为暴露源。计算模型,车身,人体,心,和心脏起搏器,是建造的。感应电场,比吸收率,用有限元法计算乘客身体和心脏的温度变化。结果表明,乘客的感应电场的最大值发生在身体的脚踝处,即60.3mV/m。心脏的感应电场值大于人体躯干的感应电场值,并且最大值(283mV/m)在起搏器电极周围。人体的最大比吸收率为1.08×10-6W/kg,位于电极附近的心脏为2.76×10-5W/kg。此外,人体躯干的最高温度升高,心,起搏器温度为0.16×10-5℃,0.4×10-6℃,在30分钟内达到0.44×10-6°C,分别。因此,感应电场,比吸收率,人体和心脏的温升低于ICNIRP中规定的安全限值。起搏器电极处的电场强度和起搏器的温升满足ICNIRP和ISO14708-2的医疗器械标准的要求。因此,本文认为,电动汽车中电机运行的电磁辐射不会对佩戴心脏起搏器的乘客的健康构成安全风险。这项研究还有助于推进电动汽车电磁环境的研究,并为确保佩戴心脏起搏器的个人安全出行提供指导。
    The number of individuals wearing cardiac pacemakers is gradually increasing as the population ages and cardiovascular disease becomes highly prevalent. The safety of pacemaker wearers is of significant concern because they must ensure that the device properly functions in various life scenarios. Electric vehicles have become one of the most frequently used travel tools due to the gradual promotion of low-carbon travel policies in various countries. The electromagnetic environment inside the vehicle is highly complex during driving due to the integration of numerous high-power electrical devices inside the vehicle. In order to ensure the safety of this group, the paper takes passengers wearing cardiac pacemakers as the object and the electric vehicle drive motors as the exposure source. Calculation models, with the vehicle body, human body, heart, and cardiac pacemaker, are built. The induced electric field, specific absorption rate, and temperature changes in the passenger\'s body and heart are calculated by using the finite element method. Results show that the maximum value of the induced electric field of the passenger occurs at the ankle of the body, which is 60.3 mV/m. The value of the induced electric field of the heart is greater than that of the human trunk, and the maximum value (283 mV/m) is around the pacemaker electrode. The maximum specific absorption rate of the human body is 1.08 × 10-6 W/kg, and that of heart positioned near the electrode is 2.76 × 10-5 W/kg. In addition, the maximum temperature increases of the human torso, heart, and pacemaker are 0.16 × 10-5 °C, 0.4 × 10-6 °C, and 0.44 × 10-6 °C within 30 min, respectively. Accordingly, the induced electric field, specific absorption rate, and temperature rise in the human body and heart are less than the safety limits specified in the ICNIRP. The electric field intensity at the pacemaker electrode and the temperature rise of the pacemaker meet the requirements of the medical device standards of ICNIRP and ISO 14708-2. Consequently, the electromagnetic radiation from the motor operation in the electric vehicle does not pose a safety risk to the health of passengers wearing cardiac pacemakers in this paper. This study also contributes to advancing research on the electromagnetic environment of electric vehicles and provides guidance for ensuring the safe travel of individuals wearing cardiac pacemakers.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    台湾已承诺到2050年实现净零碳排放,但目前台湾的碳汇程度仍不清楚。因此,这项研究旨在首先回顾台湾周围陆地和海洋中现有的自然碳汇。随后,我们提出了减少二氧化碳排放的潜在策略,并提出了二氧化碳去除方法(CDR)。天然碳汇在森林中,沉积物,台湾及其周边地区的海洋分别约为21.5、42.1和96.8Mt-CO2y-1,这显著低于台湾的二氧化碳排放量(280Mt-CO2y-1)。台湾必须考虑使用电动汽车等脱碳策略,可再生能源,和氢能,通过制定扶持性政策。除了更精确地评估陆地和海洋碳汇,台湾应该开发新的CDR,例如具有碳捕获和储存功能的生物能源,植树造林,重新造林,生物炭,海藻种植,和海洋碱度增强,到2050年达到碳中和。
    Taiwan has pledged to achieve net-zero carbon emissions by 2050, but the current extent of carbon sinks in Taiwan remains unclear. Therefore, this study aims to first review the existing nature-based carbon sinks on land and in the oceans around Taiwan. Subsequently, we suggest potential strategies to reduce CO2 emissions and propose carbon dioxide removal methods (CDRs). The natural carbon sinks by forests, sediments, and oceans in and around Taiwan are approximately 21.5, 42.1, and 96.8 Mt-CO2 y-1, respectively, which is significantly less than Taiwan\'s CO2 emissions (280 Mt-CO2 y-1). Taiwan must consider decarbonization strategies like using electric vehicles, renewable energy, and hydrogen energy by formulating enabling policies. Besides more precisely assessing both terrestrial and marine carbon sinks, Taiwan should develop novel CDRs such as bioenergy with carbon capture and storage, afforestation, reforestation, biochar, seaweed cultivation, and ocean alkalinity enhancement, to reach carbon neutrality by 2050.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

公众号