【作者】 王锦忠；

【导师】 金宗哲； 姜久春；

【作者基本信息】 北京交通大学 ， 机械电子工程， 2007， 硕士

【摘要】 随着能源危机的日趋严峻和环保呼声的日益高涨，世界各国开始重视具有节能环保特点的电动汽车的研发，我国也根据实际情况制定了电动汽车发展战略，并将其列入了国家863计划，相关关键技术的研究也已全面展开，电动汽车电气绝缘安全性能的研究便是这其中的一项。本文以北京121路示范运营电动公交车为对象，采用单片机控制技术，开发了一种能在线监测电动汽车高压系统对车体绝缘性能的“电动汽车绝缘性能检测装置”。该装置安装在电动汽车上，可在线监测高压电气系统正负母线对车体的绝缘状况，一旦出现绝缘故障及时声光报警，确保整车和人身的电气安全。 本论文首先对电动汽车高压电气系统进行了分析，建立了电路模型，提出了一种通过测量电动汽车直流系统正负母线对车体的电压来实现绝缘电阻检测的新方法，并在此基础上完成了系统总体方案的设计。系统选用FreeScale公司16位单片机MC9S12DJ64作为主控制器，相继完成了系统硬件电路设计、电子元器件选型和PCB绘制，并在Codewarrier开发环境下用C语言编写了软件程序。 本论文研制的“电动汽车绝缘性能检测装置”完成了实验室的调试实验，并在北京121路示范运营电动公交车上进行了安装实验，各项实验数据均达到了课题合同的要求，运行状况平稳可靠。 论文最后提出了该装置需要改进的一些地方，并给出了进一步研究的思路。更多还原

【Abstract】 With the increasingly worse energy crisis and higher demand for environment protection, electric vehicles featuring in energy saving and environment protection draw much attention all over the world. Our country also made electric vehicle development strategy according to its actual situation, and was included in National 863 Program; R & D of relevant key technology has been carried out comprehensively, research on electrical and insulation safety is one of this. In this thesis, a set of electric vehicle insulation detecting equipment was developed for online monitoring high-voltage insulation performance of electric vehicles. The equipment can monitor insulation condition of whole high-voltage system, and give an alarm on insulation failures and other dangerous situation, thus ensure safety of vehicle and people.Analysis on high-voltage electrical system of electric vehicles was conducted firstly in this thesis, and established a circuit model, then proposed a new method to realize insulation resistance detection via insulation voltage detecting, and finished general scheme design based on this. FreeScale 16 bit microchip MC9S12DJ64 was adopted as main controller, then finished hardware design, device and component choosing and drawing of PCB, software programming was conducted in C language under Codewarrier development environment subsequently.Commissioning of electric vehicle insulation detecting equipment was finished in laboratory, and installed on Beijing electric bus No. 121, relevant experiment data all meet with requirement stipulated in contract.Improvements needed to be done was also proposed in this thesis, meanwhile, development thought was also given.更多还原