共查询到18条相似文献,搜索用时 46 毫秒
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纯电动汽车制动能量回收存在多种结构和控制策略,以电池的SOC、车速、制动减速度、电机发电扭矩等作为约束条件,基于Amesim仿真平台,对三种不同能量回收策略进行仿真计算,分析不同回收策略在不同驾驶工况下对能耗及能量回收率的影响. 相似文献
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为提高电动汽车制动能量的回收,通过对电动汽车制动力学的和相关法规的分析,结合电机的输出特性,提出一种前、后轮制动力根据制动强度进行分配的控制策略,并在ADVISOR软件上进行了仿真分析,仿真结果表明,与ADVISOR制动力分配策略比较,在百公里能耗、制动能量回收及能量利用率上都有明显优势,同时也较好地满足了制动稳定性要求。 相似文献
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针对后驱式纯电动汽车制动能量回收策略不能兼顾最佳制动性能与最佳制动能量回收效率的问题,结合模糊控制理论寻求制动性能与能量回收效率的平衡点,并提出了基于模糊控制的能量回收策略。设计了以电池SOC、车速和制动强度为输入变量,以后轴制动力修正系数为输出变量的模糊控制器,然后根据制动强度、理想制动力曲线和电机所能提供的最大制动力确定前后轴机械制动力与电机再生制动力的分配。在Simulink软件中搭建策略模型,在AVL Cruise平台中搭建整车仿真模型,通过Simulink与AVL Cruise的联合仿真对控制策略进行验证。仿真结果表明:所研究的策略能够保证平顺性的同时提升了能量回收效率。 相似文献
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北京市区电动轻型客车制动能量回收潜力 总被引:2,自引:1,他引:1
在分析影响电动汽车制动能量回收潜力的各种主要因素的基础上,以一辆电动轻型客车为例,结合北京市区轻型客车行驶工况调查数据,统计分析了在不同车速下最大制动功率的分布特征,发现其与电动机的制动工作特性能够很好地吻合。通过对典型路段上净制动能量和可回收制动能量的统计分析,即使在行驶工况变化比较频繁的长安街上行驶,采用制动能量回收可增加的续驶里程也只有24.4%左右。最后还统计分析了制动能量相对于车速-制动减速度和电动机转速-转矩的二维分布,统计结果表明制动能量分布的密集区与所采用的电动机在制动状态下的高效率区不能很好地重合。因此从提高制动能量回收潜力的角度出发,应根据行驶工况的统计结果来指导电动汽车电驱动系统的设计,不仅要从满足驱动需求出发,还应适当兼顾制动能量回收的需求,从而更全面地提出电动汽车电驱动系统的设计要求。 相似文献
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介绍了三种汽车制动能量回收系统的工作原理和特点,简述了汽车电磁制动的工作原理,对电磁制动技术应用于汽车制动能量回收系统的必要性与可行性进行了分析。通过分析比较现有的电磁制动与制动能量回收系统集成的结构方案,提出了集成制动系统的研究重点和发展方向。集成制动系统的重点研究方向为:集成制动系统优化匹配设计、制动模式切换控制研究和集成制动系统功能的扩展。 相似文献
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车辆制动能量回收装置的研究 总被引:3,自引:0,他引:3
张世亮 《机械设计与制造工程》1999,28(4):22-23
介绍了一种新型车辆制动能量回收装置的工作原理,阐述了装置的设计要求与设计方法。该装置克服了现有车辆制动装置工作时只能消耗能量而不能回收和重复利用能量的缺点。 相似文献
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张世 《中国制造业信息化》1999,(4)
介绍了一种新型车辆制动能量回收装置的工作原理,阐述了装置的设计要求与设计方法。该装置克服了现有车辆制动装置工作时只能消耗能量而不能回收和重复利用能量的缺点。 相似文献
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针对一款混合电动汽车,建立ISG电机模型和电动车动力传动系模型,在满足ECE(Economic Commission of Europe,简称ECE)基础上,为了保证汽车驾驶员的良好体验感和驾驶安全性,设计了一种基于能量最大化的制动能量回收控制策略,此控制策略对制动时的工作状态进行目标最优化设计,把优化后的电机最佳工作... 相似文献
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电动汽车复合能源系统再生制动分段控制策略研究 总被引:1,自引:0,他引:1
为了提高电动汽车复合能源系统的制动能量回收效率,对蓄电池,超级电容和双向DC/DC变换器相结合的复合能源系统和常规控制策略进行了研究,改进了复合能源系统,使其具有3种再生制动工作模式,并提出了再生制动分段控制策略。在高速段、中速段和低速段3个不同的阶段,采用了不同的再生制动控制方式,并根据超级电容电压、电机转速等因素确定了各阶段间切换时刻。通过电机制动电流和各阶段切换时刻优化控制,实现了平稳制动。以微型电动汽车为搭载对象,对常规控制策略和分段控制策略在两种不同初始制动车速下进行了制动工况的实测实验。实验结果表明,在分段控制策略作用下,微型电动汽车制动平稳,制动能量回收效率得到了提升。 相似文献
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The existing research of the acceleration control mainly focuses on an optimization of the velocity trajectory with respect to a criterion formulation that weights acceleration time and fuel consumption. The minimum-fuel acceleration problem in conventional vehicle has been solved by Pontryagin's maximum principle and dynamic programming algorithm, respectively. The acceleration control with minimum energy consumption for battery electric vehicle(EV) has not been reported. In this paper, the permanent magnet synchronous motor(PMSM) is controlled by the field oriented control(FOC) method and the electric drive system for the EV(including the PMSM, the inverter and the battery) is modeled to favor over a detailed consumption map. The analytical algorithm is proposed to analyze the optimal acceleration control and the optimal torque versus speed curve in the acceleration process is obtained. Considering the acceleration time, a penalty function is introduced to realize a fast vehicle speed tracking. The optimal acceleration control is also addressed with dynamic programming(DP). This method can solve the optimal acceleration problem with precise time constraint, but it consumes a large amount of computation time. The EV used in simulation and experiment is a four-wheel hub motor drive electric vehicle. The simulation and experimental results show that the required battery energy has little difference between the acceleration control solved by analytical algorithm and that solved by DP, and is greatly reduced comparing with the constant pedal opening acceleration. The proposed analytical and DP algorithms can minimize the energy consumption in EV's acceleration process and the analytical algorithm is easy to be implemented in real-time control. 相似文献
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轮边电力驱动系统再生制动控制技术研究 总被引:1,自引:0,他引:1
轮边电力驱动系统中的再生制动系统主要涉及制动能量分配控制技术和再生制动能量回收控制技术.轮边电力驱动工程机械采用双向DC/DC变换器,结合电压电流双闭环控制实现超级电容的储能,从而控制再生制动能量的回收.通过MATLAB建模仿真表明,在满足安全制动的前提下,能够实现最大化的能量回收. 相似文献
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Resolvers are normally employed for rotor positioning in motors for electric vehicles,but resolvers are expensive and vulnerable to vibrations.Hall sensors have the advantages of low cost and high reliability,but the positioning accuracy is low.Motors with Hall sensors are typically controlled by six-step commutation algorithm,which brings high torque ripple.This paper studies the high-performance driving and braking control of the in-wheel permanent magnetic synchronous motor(PMSM) based on low-resolution Hall sensors.Field oriented control(FOC) based on Hall-effect sensors is developed to reduce the torque ripple.The positioning accuracy of the Hall sensors is improved by interpolation between two consecutive Hall signals using the estimated motor speed.The position error from the misalignment of the Hall sensors is compensated by the precise calibration of Hall transition timing.The braking control algorithms based on six-step commutation and FOC are studied.Two variants of the six-step commutation braking control,namely,half-bridge commutation and full-bridge commutation,are discussed and compared,which shows that the full-bridge commutation could better explore the potential of the back electro-motive forces(EMF),thus can deliver higher efficiency and smaller current ripple.The FOC braking is analyzed with the phasor diagrams.At a given motor speed,the motor turns from the regenerative braking mode into the plug braking mode if the braking torque exceeds a certain limit,which is proportional to the motor speed.Tests in the dynamometer show that a smooth control could be realized by FOC driving control and the highest efficiency and the smallest current ripple could be achieved by FOC braking control,compared to six-step commutation braking control.Therefore,FOC braking is selected as the braking control algorithm for electric vehicles.The proposed research ensures a good motor control performance while maintaining low cost and high reliability. 相似文献