文档介绍：iZVS型全桥变换器的大功率智能充电机的研制ii摘要随着近年来新能源和电动汽车的蓬勃发展,对大容量蓄电池的需求也随之增加,大功率智能充电机作为车载蓄电池的配套产品也成为研究的热点之一。传统的直流电源由于存在体积和重量大、效率低、输出可调范围窄等缺点越来越难以满足对大功率充电小型轻量高效要求。大功率、智能化、高效率的充电电源有着广阔的市场前景。本文利用ZVS型全桥变换器作为主电路结构,研制了一台110V/100A输出的工程样机。本文的工作主要包括:对比目前几种常用的直流充电电源,确定使用高频开关电源作为充电机主电路。对目前常用的大容量蓄电池充电方法进行了分析和比较,确定了六段式智能充充电方案。介绍了高频软开关技术相对于传统硬开关技术的优点,详细的分析了ZVS型全桥变换器的工作原理,并确定以此种类型电路为主电路结构。设计和计算了主电路重要元件的参数,完成关键器件的选型工作。重点阐述了智能充电机的控制方案,3895移相全桥控制芯片和PIC16F887单片机的基础上设计了控制电路,并实现了以电压、电流双闭环有效控制充电过程中各个阶段充电电压和电流,并在以PIC16F887单片机为核心控制芯片的基础上设计了硬件电路和控制软件,实现对充电机的保护、智能化阶段式充电控制以及液晶显示等功能。本文最后分析了110V/100A输出工程样机的波形和充电实验测得的数据,从测得的波形数据来看,本项目实现了变换器的高频软开关和预期转换效率并通过充电试验验证了样机对充电过程智能化的控制,达到了设计要求。并对整个项目作出总结,提出几点期望。关键词:ZVS 3895 PIC16F887 智能充电iiiDevelopment of ZVS full-bridge converter for high power intelligent battery chargerAbstractWith thevigorous developmentof the new energy andelectric vehiclesin recent years,thedemandfor highcapacitybatteryis also battery chargerwith high power and efficiencyhas also eone of the hotresearch areas. Duetothelarge size ,heavy weight, low efficiency,the traditionalDC power supplycan not meetthe requirements of small size , light weight,high power and efficiency,high-efficiencyand intelligent for battery charger,Modern intelligent battery charger hasbroad this paper,the main circuitstructure of the battery charger isZVSphase-shifted full-bridge converterand an experimental prototypewith110V/100Aoutputis this paper is as pare with severalkinds of DC power supply and select high frequency switching power supply as the main circuit for the battery battery charging method is introduced after the analysis and comparison ofthepresenthigh-capacitybatterycharging the highfrequencysoftswitchingtechnology andanalyze the operationprincipleoftheZVSphase-shifted full-bridge selection of the ponents pleted bydesign