升降压PFC车载充电机的研究

传统车载充电机没有考虑电池过放的情况,对过放电池充电时存在电流过大的问题。文中提出了一种具有功率因数校正功能,工作在降压和升压模式的PFC拓扑结构。仿真和实验结果表明,将此拓扑结构应用在车载充电机是合理可行的。     

基于平均电流的功率因数校正电路设计与仿真

为了减少车载充电机功率因数校正电路对公共电网的谐波污染,并保证其向后级电路传送稳定的直流电压,设计了一种以UC3854芯片为核心,采用双闭环控制策略的功率因数校正电路。电流内环控制PWM信号,实现Boost电路输入电压与输入电流的相位相同,电压外环控制实现输出电压的稳定。通过建立功率电路的数学模型,根据传递函数的特点设置了电流内环、电压外环补偿网络的参数。最后通过仿真验证了所有设计参数的正确性,实现了低谐波、低污染和高功率因数的目标。     

三相PWM整流器在电动汽车充电机上的应用

本文对电动汽车充电机的功率电路拓扑结构进行了设计,详细分析了三相PWM整流电路的工作原理。同时针对充电机的特点对功率因数、充电效率等方面的性能做了优化,并结合实际电路对控制方法进行了改进。利用MATLAB/SIMULINK工具对电路拓扑和控制方法进行了仿真,仿真结果表明:设计的方法正确,软开关技术有效;与传统整流器相比,直流侧电压稳定脉动小,交流侧电流接近正弦,而且电压电流相位一致,能够极大的提高功率因数,同时充电的效率能够达到设计的要求。     

电感-电容型恒流充电机

在激光技术领域中,充电机往往是不可缺少的设备之一.随着激光技术的发展,充电机也在不断改进,根据不同的用途,研制出了多种类型的充电机.最初使用的恒压充电机逐步淘汰而代之以恒流充电机.前者的充电效率最高也不超过50%,而后者的充电效率大大提高.恒流充电机的类型及其原理也有好几种.这里简要地介绍一种电感-电容型(以下简称为L-C型)恒流充电机.这种充电机的特点是:充电效率高,一般可达86%左右,理论上可达95%左右;功率因数 cos￠     

完善我国非车载传导充电设备的电磁兼容要求

随着我国新能源汽车,特别是纯电动汽车的迅速发展,与电动汽车充电站配套的非车载传导充电设备的研发和生产进入一个全盛时期。非车载传导充电设备按输出电流种类不同,主要分为交流充电桩和直流充电机两大类;目前交流充电桩已经出现立式、壁挂式等多种安装方式,而直流充电机的额定功率也越来越大。     

基于PWM整流器的高效电动汽车充电机设计

介绍一种用于电动汽车电池充电机的设计实现方法.为满足高功率因数和高效的要求,采用三相PWM整流器和移相全桥变换器两级变换模式.前者基于空间电压矢量PWM直接功率控制（DPC）,实现单位功率因数;后者基于零电压零电流（ZvZCS）控制,实现高效的电能变换.以该方法设计的8 kW的充电机在大部分充电过程中,效率高于84％,输入功率因数高于99.3％.     

电动汽车EMC措施不当示例分析

从EMC系统内措施(包括接地、屏蔽和滤波)设计缺乏或不足的角度,分析了电动真空泵堵转、车载充电机传导发射等问题,并采取增加接地线、加装滤波器等措施解决了这些问题.     

L-C型恒流充电机的应用局限性

由于恒流充电机的外部伏一安特性能与气体放电的伏一安特性较好地匹配,所以在气体激光器中普遍采用了恒流充电机来作为电源。虽然恒流充电机的类型及其原理有好多种,但L—C 型恒流充电机具有充电效率高;功率因数 cosφ高(接近于1),无稳态短路电流,不怕     

浅析电容式三相硅整流充电机

１引言目前工业应用的蓄电池充电主要有两类：一类是由调压器、整流变压器和整流二级管组成的充电机;另一类是由整流变压器、可控硅和移相触发器等环节组成的充电机。这两类充电机均属于感性设备,功率因数低,电能损耗大,效率低,体积大,成本较高等等。本文推出一种电...     

电动汽车非车载式充电机系统研制

针对我国电动汽车成为国家十二五重点发展战略性新兴产业的实际情况,为了实现基于IGBT器件的非车载充电机,采用了ADUC813为控制板核心、模块化设计的方案,主回路电路采用国产IGBT器件作为逆变控制器件,控制板电路包括信号采集、反馈及UCC3895移相控制电路,采用ZVSZCS软开关技术降低开通损耗,解决了IGBT器件的电流拖尾,提高电路效率,通过试验采集ZVZCS波形结果,验证了该系统方案满足研制要求。     

Nonconventional on-board charger for electric vehicle propulsionbatteries

Electric vehicles (EVs) are needed in densely populated urban areas to reduce air pollution. Battery chargers are needed to supply DC voltage to charge the high-energy battery parks used in EVs. This paper deals with an on-board battery charger arrangement that is fully based on the use of the power components of the EV motor drive. Desired features for EV battery chargers such as minimum volume, low cost, high efficiency, and high reliability are fully matched by means of the proposed solution. The proposed on-board charger arrangement has been installed on an electric scooter prototype being developed for the Far East markets. Design analysis and experimental results of the on-board charger prototype are presented     

车载充电器安全风险分析

车载充电器质量的好坏关系到每位使用者的人身、财产安全,因此,对车载充电器安全风险进行分析是非常必要的.本文从车载充电器的安全风险源进行分析,包括过电压强度、过电流保护、外壳阻燃以及正、负极触片距离四个测试,并分析了故障的危害;模拟两种车载充电器使用过程中的事故情况,从实用角度对产品危害程度进行了评估;最后,从行政监管、制造商、消费者三个角度提出了车载充电器安全生产及使用的建议.     

Development of a Compact Switched-Reluctance Motor Drive for EV Propulsion With Voltage-Boosting and PFC Charging Capabilities

This paper presents a compact battery-powered switched-reluctance motor (SRM) drive for an electric vehicle with voltage-boosting and on-board power-factor-corrected-charging capabilities. Although the boost-type front-end DC/DC converter is externally equipped, the on-board charger is formed by the embedded components of SRM windings and converter. In the driving mode, the DC/DC boost converter is controlled to establish boostable well-regulated DC-link voltage for the SRM drive from the battery. During demagnetization of each stroke, the winding stored energy is automatically recovered back to the battery. Moreover, the regenerative braking is achieved by properly setting the SRM in the regenerating mode. The controls of two power stages are properly designed and digitally realized using a common digital signal processor. Good winding current and speed dynamic responses of the SRM drive are obtained. In addition, the static operation characteristics are also improved. In the charging mode, the power devices that were embedded in the SRM converter and the three motor-phase windings are used to form a buck-boost switch-mode rectifier to charge the battery from utility with good power quality. All constituted circuit components of the charger are placed on board, and only the insertion of power cords is needed.      

An integrated battery charger/discharger with power-factorcorrection

Distributed power supply systems are an attractive solution to meeting the requirements (redundancy, modularity, battery backup, etc.) for the next generation of power supply systems. In addition, the normalization regarding power factor and total harmonic distortion (THD) makes it necessary to include power factor correction in the input stage in such architectures. This paper presents a novel approach of an integrated battery charger/discharger which offers power factor correction and battery galvanic isolation in a simple structure. Placing the battery in the primary side overcomes the need of galvanic isolation integration in each of the DC/DC on-board power converters when this topology is used as part of a distributed power supply system     

基于单片机的智能手机充电器的设计

随着手机技术的持续快速发展,如何对智能手机电池进行安全有效地充电,已经成为了一个重要的课题。单片机技术在工业控制领域有着广泛的应用,利用它的处理控制能力可以实现充电器的智能化。本设计主要根据手机充电器现状,在传统的手机充电器基础上,使用AT89C58单片机来实现手机锂电池充电器方面的应用,充电控制部分由MAX1898芯片完成。该充电器能够实现电池的预充、快充、定时充电、充电需时提醒、充电后自动断电、充满提醒、LED灯提示、电路安全保护、温度控制、应急发电等功能。     

中国手机充电器标准化的潜在影响分析(英文)

The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in China after the introduction of standardization are predicted based on Bass diffusion model. The results indicate that the standardization would have little influence on mobile phone producers, but may charger makers face a fierce turbulence. Standardization would not only reduce the size of c...     

基于TSM102的高效率铅酸蓄电池充电器设计

针对当前市场上流行的铅酸蓄电池充电器充电效率过低,开关器件消耗的热功率过大,投入在散热装置上的成本过高,充电器体积太大等多种弊端,提出一种新型的低成本、高效率铅酸蓄电池充电器设计方案。     

High-Efficiency and Low-Stress ZVT–PWM DC-to-DC Converter for Battery Charger

This work presents a novel highly efficient and low-stress battery charger with a resonant switch converter—based on resonance and zero-voltage-transition soft-switching theory—that reduces defects associated with high voltage and high current stresses caused by the resonance of traditional resonant circuits. The novel battery charger meets the requirement that all circuit components must operate with zero-voltage switching. Experimental test results indicate that the proposed battery charger reduces the temperature of an active power switch, and switching losses are less than those obtained using a traditional pulsewidth-modulation converter as a battery charger.      

基于芯片MAX846A的实用锂离子电池充电器的设计

锂离子电池应用十分广泛,高性能锂电池充电器应运而生。文中介绍了一种基于新型充电器件MAX846A的锂离子电池充电器的工作原理和充电过程,并在此基础上给出了该充电器的工作参数设置。     

基于LT3652的太阳能充电器设计方法

基于太阳能充电器需求的不断增加,采用LT3652电池充电管理芯片设计了一种多功能太阳能充电器。在详细介绍LT3652输入电压调节环路及该芯片的其他功能的基础上,针对设计过程中涉及的元器件选型,PCB布线注意事项作了详细介绍。同时对如何设计更具有生命力和适应性的充电器产品给出了建议。笔者设计的太阳能充电器可实现对光伏电池...