共查询到19条相似文献,搜索用时 156 毫秒
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从电动车电驱动系统的基本特性出发,以电动车工况为中心,建立了最大效率控制下异步电动机的仿真模型。通过实例在线性条件与考虑饱和的非线性条件下进行了最大效率控制的仿真计算,而且将最大速率控制与传统U/f恒定控制进行了比较分析。详细分析了最大效率控制效果,验证了电动车异步电动机实现最大效率控制的可行性。 相似文献
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从静止坐标系下感应电机等效电路出发,在研究磁链定向下感应电机损耗模型的基础上,对电机最大效率控制进行了仿真研究,详细研究了最大效率控制策略下的电机各个参量和各种损耗的变化及关系,并且与不考虑效率情况下的控制方式进行了比较。对仿真结果进行了分析,结果表明文中控制策略能够使感应电机运行效率明显提高。 相似文献
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赵剑飞向茜王爽 《中国电机工程学报》2023,(14):5634-5642
电动车经常运行在频繁启停、加减速和变负载工况下,宽调速工况下的高效运行是关键问题。该文研究电动车用模块化轴向磁通永磁同步电机的宽转速范围效率优化方法。首先,针对电机模块内定子单元的效率优化问题,提出采用等效损耗电阻在线补偿的损耗最小控制方法,基于损耗模型得到效率最优的控制电流指令值;然后,针对多模块系统的效率优化问题,提出转矩分级优化分配策略,根据模块的效率分布和遗传算法设计电机各模块、模块内各单元的转矩分配方法;最后,通过仿真和实验验证了所提控制方法可以有效降低驱动系统损耗,增加系统高效率区间,提升电动车续航里程。 相似文献
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《电源世界》2006,(12):I0001-I0001
汽车工艺、电工技术、电子技术、信息技术和电化学技术等关键技术的发展,为电动车取代传统的燃油汽车奠定了基础。电力电子技术作为电动车的核心技术之一,在电动机驱动系统的控制、辅助电源、转向控制、充电系统等领域都发挥着及其重要的作用。电动车面对的电能储存及其使用问题,都与电力电子技术密不可分。如何进一步提高驱动控制系统的性能、降低成本,提高变换效率和控制功能是电力电子技术急需解决的问题。《电动车驱动及能源系统中关键技术综述》一文详细介绍了电动车的驱动系统、电池及其能量管理系统,对目前电动车研究中常用几种电池的特性进行了比较,分析了电动车的能源构成系统,最后通过仿真对得出的结论进行了验证。通过该文读者能够对电动车驱动及能源系统中的关键技术有一个清晰的认识。 相似文献
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电动汽车电机驱动系统最大效率控制综述 总被引:3,自引:0,他引:3
电动汽车以其高效率、低排放等优点受到越来越多的重视。由于二次电池储存能量的有限性,因此电机驱动系统的效率是增加续驶里程,降低成本的关键之一。对电动汽车电机驱动系统最大效率控制进行了综述。从电机驱动系统着手,首先分析了最大效率控制的工作原理。对其实现方法和特点进行了重点阐述.并指出了最大的效率控制实现的条件。 相似文献
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One of the most important technologies for electric vehicles (EVs) will be drive control technology for the main motor. It is desired that the drive control technology have the following characteristics. (1) It does not require a position/speed sensor for controlling motor drive, which has been mounted on the rotor shaft. (2) It has vector controls that can produce torque quickly, efficiently, and/or precisely. (3) It has wide driving‐range and allows developing EVs with no variable transmission. This paper proposes new drive control technologies for such EVs using a permanent‐magnet synchronous motor as a main motor, and verifies its usefulness through development of an actual EV that can drive on public roads. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(3): 83–94, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20459 相似文献
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研究分析了电动车用定子双馈电双凸极(SDFDS)电机在高速运行时的弱磁控制原理,充分利用了SDFDS电机具有励磁磁场可独立调节的优点,提出了相应的弱磁调速策略,使得SDFDS电机调速系统在高速运行时获得了较高的控制性能.并基于Matlab/SIMULINK和实验平台进行了仿真和实验,实现了SDFDS电机高速弱磁控制,电机转速控制性能良好,证明了所设计SDFDS电机高速弱磁控制策略的有效性. 相似文献
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提出了一种应用于电动汽车一体化充电系统中的单相PWM整流有源滤波的控制方法,以抑制充电中单相整流电路的直流电压二次纹波。在单相电网电压充电时,这种控制方法能通过控制电机驱动器电路,复用其中的两相同时进行单相整流和有源滤波,在实现整流器单位功率因数运行、稳定输出直流电压的同时,减小直流侧电压的二次纹波,减小网侧输入电流的总谐波畸变率。对单相整流直流侧电压二次纹波的产生机理、有源滤波电路的拓扑结构、单相整流和有源滤波的控制原理和方法进行了详细地分析。最后搭建输入电压峰值110 V,输出直流电压220 V,负载等效电阻100Ω的仿真模型,通过仿真和实验结果验证了所提控制方法的可行性。 相似文献
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Manufacturing and Control of a Variable Magnetic Flux Motor Prototype with a Mechanical Adjustment Method
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TAKAAKI ISHII TSUYOSHI NONAKA SOHEI OGA MOTOMICHI OHTO 《Electrical Engineering in Japan》2017,199(1):57-66
A new structure and control method for a variable magnetic flux motor (VMFM) is proposed to achieve a high‐efficiency electric vehicle (EV) motor drive under a wide range of conditions. A VFMF prototype that was designed by considering the loss was manufactured and evaluated in an experiment. The prototype demonstrated low iron loss and sufficient max torque. Thus, the prototype can provide a high‐efficiency drive with low output, which is frequently the case for EVs. Map control enables a wide phase angle for the vector‐control drive of the VMFM under a changing magnetic flux. Thus, the VMFM provides a high‐efficiency drive under a wide range of conditions. 相似文献
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Xiaoshuai Xin Haichao Shan Yang Yang 《IEEJ Transactions on Electrical and Electronic Engineering》2016,11(3):374-383
An induction motor drive system is widely used in electric vehicles (EVs). However, most control strategies of these EVs focus only on control of the induction motor without considering the switching of different driving conditions and the changing of motor parameters. The upper limits of the torque generated by the motor are different under different motor parameters and driving conditions, which may lead to the fluctuation of the driving torque and affect the comfort and safety of the driver. This paper proposes a vector‐control‐based flexible control strategy to deal with this problem. First, the threshold values of the automatic speed regulator (ASR) and the automatic voltage regulator (AVR) could change with respect to the state variables of the motor including the change in driving conditions and some motor parameters; second, a backward proportional integral controller, which has a dynamically adjustable threshold, is added to the output of the ASR and AVR to achieve the flexibility of driving torque. Finally, a calculator that has threshold value is added to the input of the ASR and AVR controller. The results of simulation show that the designed flexible control strategy can achieve the stability of motor current, torque, and speed during the switching of different driving conditions. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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Chan C.C. Jiang J.Z. Chen G.H. Wang X.Y. Chau K.T. 《Industry Applications, IEEE Transactions on》1994,30(5):1258-1266
A novel high-power-density permanent magnet (PM) motor drive for electric vehicles (EVs) is proposed. The motor is a polyphase multipole square-wave PM motor, which can be classified as a kind of PM brushless DC motor. The distinct features of the proposed motor as compared to those of the conventional PM brushless DC motor are as follows. First, the multipole magnetic circuit arrangement enables the minimization of the magnetic yoke, resulting in the reduction of motor volume and weight. Second, the coil span is purposely designed to be equal to one slot pitch, thus saving the amount of copper used. Third, by using a fractional number of slots per pole per phase, the arrangement of the numbers of poles and slots is so unique that the magnetic force between the stator and the rotor at any rotating position is uniform, hence eliminating the cogging torque that usually occurs in PM motors. Finally, the motor can be controlled to operate at a constant torque region and a constant power region with field weakening, thus both high starting torque and high cruising speed can be achieved. Therefore, as the proposed motor drive possesses the distinct advantages of high power density, high efficiency, and superior dynamic performance, it is very suitable for EV applications. A prototype of a five-phase 22-pole 5 kW motor drive has been designed for an experimental EV 相似文献