柴油ISG并联混合动力系统关键参数设计

给出了柴油机启动发电机一体化(ISG)电机启动扭矩和最大功率这2个关键性能参数的设计方法.以曲轴系统运动学分析和倒拖试验相结合来设计启动扭矩;以驾驶循环统计分析来设计最大功率.最后以Ford Explorer SUV车型为例给出了设计参数,并使用动力系统分析工具包PSAT软件进行了仿真计算.仿真结果表明:在保持车辆原有动力性的情况下,安装了ISG混合动力系统的车辆油耗在城市循环时下降了35%,在高速循环时下降了27%.     

永磁同步电机扁线6层定子绕制嵌线技术研究

驱动电机关乎着汽车的动力性能和能源转换效率,永磁同步扁线电机因其大扭矩、恒功率、强磁场等优势逐步成为新能源汽车的首选。文章通过分析扁线多层电机的性能参数,以永磁同步扁线6层定子电机为例,采用叠绕组和波绕组两种绕制方式展开绕组绘制图,对6层定子绕组接线方式进行了细致分析,得出叠绕短距绕制时节省端部用铜,但引接线比较杂乱且最后线圈嵌线较困难;波绕组虽引接线整齐美观,但短距绕制时不能节省端部用铜量,据此解读了扁线电机定子绕组的嵌线技术,力求解决职业院校教学中的难点和汽车维修技术上的难题。     

ISA/ISG在42V汽车电源系统中的应用分析

本文分析了提升汽车电源电压从14V到42V的技术原因。重点介绍了组成汽车42V系统的车载电源、一体化的启动机/发电机系统的结构和性能。分析了对该系统的独特要求,并介绍了一种基于TMS320LF241芯片永磁同步电动机的IGA/ISG系统控制方案。指出了采用集成式起动机/发电机是一种较好的选择。     

奥迪Q5混合动力新技术剖析(四)

8.电驱动装置的电机V141 电驱动装置的电机V141参数说明如表5所示. 电驱动装置的电机安装在2.0L-TFSI发动机和8挡自动变速器之间的空隙处(取代了变矩器),位置如图28所示.该电机是永久激励式同步电机,由1个三相场来驱动.转子上装备有永久磁铁(由钕-铁-硼制成,NdFeB).电驱动装置的电机V141集成在三相交流驱动装置VX54内.电驱动装置的电机由电驱动控制单元J841和电驱动功率和控制电子装置JX1来操控,通过改变频率来调节转速,通过脉冲宽度调制来调节扭矩.通过功率控制电子装置来将266V的直流电转换成三相交流电,这个三相电可在电驱动装置的电机内产生一个三相电磁场.     

混合动力客车智能防抱死刹车控制(英文)

基于模糊神经控制(NFC)理论,提出了一种混合动力客车的智能防抱死刹车控制方法。通过模糊神经控制器,有效而合理地分配了集成起动电机(ISG)和刹车片之间的刹车扭矩。实验表明:刹车性能和制动回馈效果均得到改善,有利于混合动力客车的安全与节能。     

混合动力轿车动力系统匹配仿真分析

对采用ISG电机的一款混合动力轿车进行了系统匹配仿真分析,通过对NEDC和SHDC工况下不同电机功率匹配情况、燃油消耗的仿真分析,得出了不同电机功率匹配对油耗的影响;接下来通过0~100km/h加速仿真,确定了满足加速性能要求的电机功率,并通过多次连续加速测试确定了电池容量的大致需求。从仿真分析的角度提出了ISG系统可行的匹配方案和预期的开发目标。     

汽车节能环保英语缩略语辨析(三)

ISG(Integral Starter Generator)集成起动机/发电机 ISG又称为IMG(Integral Motor Generator)集成电机/发电机,它是一个通过永磁体内转子和单齿定子来激励的同步电机,该驱动单元适用于起动/停止系统、以及轻度和中度混合动力,可实现起动、电机推进和助力、能量再生功能. LPG(Ligudfied Petroleum Gas)液化天然气 LPG是指由天然气处理厂或炼油厂生产的以丙烷、丁等等低分子碳氢化合物为主的混合物,是油田伴生的气体和工厂副产品,以液态储存和运输.     

某纯电动汽车驱动系统24阶振动噪声的分析与优化

简述纯电动汽车用驱动电机系统振动噪声的来源、传递路径及优化途径,并针对某纯电动汽车蠕行模式驱动电机系统24阶振动噪声进行分析,得出车辆在130～200r/min转速范围内、 74Hz频率附近局部强化的24阶振动噪声是由驱动电机激励、驱动电机电磁力波频率同车辆动力总成固有频率共振引起的。同时提出了增加预置扭矩、优化扭矩阶跃强度的方案,有效地减弱了蠕行模式驱动电机系统24阶振动噪声。     

电机零位对电动汽车能耗影响研究

为解决永磁同步电机因零位偏差过大而影响电机的控制效果和运行效率,本文主要从电机零位偏差对电动汽车能耗的影响进行深入研究,并研发电机零位标定功能,从而实现电机高精度的扭矩控制、降低能耗、提升续驶里程。     

直线式增程器用直线ISG电机结构设计与优化

根据直线发动机的结构与性能和直线式增程器的起动与发电要求,设计了与该直线发动机相匹配的管状永磁三相直线ISG电机。利用电磁场有限元分析法研究了直线ISG电机的结构参数对其性能的影响,并通过多目标优化选取了直线ISG电机的最佳结构参数。结果表明:所设计的直线ISG电机满足性能要求,优化后输出功率提高了8.7%,空载感应电动势提高了12.1%,定位力标准差降低了94.6%,效率则基本维持不变。     

Development of an electric motor-driven pump unit for electro-hydraulic power steering with 42V power-Net

Motorization in vehicles is expanding rapidly for fuel efficiency, customer comfort, convenience, and safety features. These new electric loads represent an increase in the required electric power. This has generated interest in new, higher power systems such as the 42V Power Net. The electro-hydraulic power steering (EHPS) system is one of these systems. This paper presents the development of the electric motor-driven pump unit for the EHPS system using a 42V power-Net. The interior type permanent magnet synchronous motor (IPMSM) can be applied to this system with more power density per volume for compactness of the EHPS. In order to improve the system, the IPMSM and its control method was optimized for improved torque characteristics and electric power consumption. The performances of both the pump unit and the IPMSM have been verified by experimental results. Finally, all in one type the electric motor-driven pump unit are developed from the experiment verification.     

汽车电动助力转向控制系统的初步研究

自行设计的电动助力转向系统(EPS)由控制器、转向盘转矩传感器、车速传感器、电流传感器(在控制器内)、助力电机及减速机构、机械式转向器、蓄电池等组成。EPS的控制系统主要由控制器、传感器及信号处理电路、助力电机及驱动电路等组成。控制算法由电机助力控制算法和电机转矩控制算法两部分构成。该方案易于实现，同时又能保证转向控制系统较高的控制精度。     

电容式混合动力轿车整车控制策略研究

设计开发了双离合器、单轴并联ISG电机结构的电容式混合动力轿车。深入研究该混合动力系统控制策略,对车辆运行工况进行了严格划分,优化了各工况下发动机、电机的扭矩分配。通过大量台架标定实验对各工况入口参数及控制参数进行了优化匹配,并在Matlab/Simulink仿真平台和转毂试验台架上对该控制策略进行了验证。     

单轴并联式混合动力总成的设计

设计完成了驱动电机与电控共轨柴油机结合而成的混合动力汽车动力总成,该总成用于单轴并联式混合动力汽车。驱动电机既是电驱动装置,又是起动、发电一体化系统(ISG),基于MC 68H9S12DP256B单片机,研制了该总成的控制系统,通过CAN总线实现了联合控制,以电池充放电平衡和发动机燃油经济性为基础,应用了一种模糊逻辑控制策略,实现了混合动力系统的扭矩分配与不同工作模式以及模式间的切换,该总成能够在所要求的工作模式下运转。     

电动助力转向系统的回正与主动阻尼控制策略研究

针对配备电动助力转向系统的车辆低速时回正性差,而中高速时又容易出现回正超调的现象,提出了一种新型的回正与主动阻尼控制策略。该控制策略以功能原理为理论基础,可以随车速和转向盘转角的不同而调整回正力矩或阻尼力矩的大小。实车试验的结果证明,该控制策略能够改善车辆低速时的回正性,抑制车辆中高速时的回正超调现象,并且在施加了回正与主动阻尼控制后,驾驶员的操纵手感没有受到不良的影响。     

Vehicle dynamics control of an electric-all-wheel-drive hybrid electric vehicle using tyre force optimisation and allocation

ABSTRACT

Hybrid Electric Vehicles (HEV) offer improved fuel efficiency compared to conventional vehicles at the expense of adding complexity and at times, reduced total power. As a result, HEV generally lack the dynamic performance that customers enjoy. To address this issue, the paper presents a HEV with electric All-Wheel-Drive capabilities via the use of torque vectoring electric rear axle drive (TVeRAD) to power the rear axle. The addition of TVeRAD to a front wheel drive HEV improves the total power output. To improve the handling characteristics of the vehicle, the TVeRAD provides torque vectoring at the rear axle. A bond graph model of the drivetrain is developed and used in co-simulation with CarSim. The paper proposes a control system which utilises control allocation to optimise tyre forces. The proposed control system is tested in the simulation environment with a high fidelity CarSim vehicle model. Simulation results show the control system is able to maximise vehicle longitudinal performance while avoiding tyre saturation on low mu surfaces. More importantly, the control system is able to track the desired yaw moment request on a high speed double lane change manoeuvre through the use of the TVeRAD to improve the handling characteristic of the vehicle.     

ISG柴油混合动力客车能量分配策略研究

以ISG柴油混合动力客车整车控制策略为基础,综合考虑客车燃油经济性和排放,提出一种基于模糊神经网络的能量分配策略,该策略根据模糊控制原理,结合人工神经网络自主学习功能,以电池SOC、整车需求转矩以及发动机转速为模糊输入来确定发动机和电机的最佳输出转矩分配,再以神经网络对控制的模糊规则进行记忆.仿真结果表明,该策略比普通逻辑控制更加有利于燃油经济性的提高,并在一定程度上改善了排放性能.     

四轮驱动混合动力汽车整车控制器设计

基于兼具ISG起动电机和轮毂电机的四轮驱动混合动力汽车结构平台,利用MC9S12DP512单片机作为控制器的CPU,设计了CAN通讯网络结构、输入输出和看门狗应用电路,并增强了电源的EMC设计。在CodeWarriorV4.5开发环境下编写了底层驱动程序,并进行了现场测试。结果表明,电机转矩变化迅速,可以满足整车转矩的瞬时要求,验证了该控制器的可靠性和通用性。     

Decoupled self-tuning PI controller for an idling stop system applied to scooters

This paper is aimed to propose a decoupled self-tuning proportional plus integral (PI) controller with simple law for an idling stop system applied to scooters. An integrated starter generator (ISG) of the idling stop system is designed with a high efficiency permanent magnet synchronous motor (PMSM). The PMSM used as an ISG must have a high torque characteristic to ensure that the engine can be accelerated up to firing speed. A conventional and useful control algorithm named PI control is unable to handle motor current very well for dynamic load, parametric variation, and external disturbance, especially in a vehicle application. Therefore, a robust algorithm for current control in an ISG is proposed. The decoupled selftuning PI controller based on the Lyapunov stability theorem is utilized to guarantee the control performance. Numerical simulations demonstrate the effectiveness of the proposed control algorithm. Experimental results show that the engine of a 150 cm3 scooter can be cranked to reach firing speed by a ISG within 0.1?0.2 second. The proposed method is simple, robust, as well as stable for idling stop system, and can be effectively implemented.     

Lateral stability control of dynamic steering for dual motor drive high speed tracked vehicle

In this paper, the torque and power required by dual motors for electric tracked vehicle during dynamic steering maneuvers with different steering radiuses are analyzed. A steering coupling drive system composed of a new type of center steering motor, two Electromagnetic (EM) clutches, two planetary gear couplers, and two propulsion motors is proposed for the dual motors drive high speed electric tracked vehicle (2MHETV), which aims to improve its lateral stability. An average torque direct distribution control strategy based on steering coupling and an optimization-distribution-based close-loop control strategy are designed separately to control the driving torque or regenerative braking torque of two propulsion motors for vehicle stability enhancement. Then models of the 2MHETV and the proposed control strategy are established in Recudyn and Matlab/Simulink respectively to evaluate the lateral stability of dynamic steering for the 2MHETV with different steering radiuses on hard pavement.The simulation results show that the lateral stability of the 2MHETV can be significantly improved by the proposed optimization-distribution-based close-loop control strategy based on steering coupling system.