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With the worldwide deterioration of the natural environment and the fossil fuel crisis, the possible commercialization of fuel cell vehicles has become a hot topic. In July 2008, Beijing started a clean public transportation plan for the 29th Olympic games. Three fuel cell city buses and 497 other low-emission vehicles are now serving the Olympic core area and Beijing urban areas. The fuel cell buses will operate along a fixed bus line for 1 year as a public demonstration of green energy vehicles. Due to the specialized nature of fuel cell engines and electrified power-train systems, measurement, monitoring and calibration devices are indispensable. Based on the latest Bluetooth wireless technology, a novel Bluetooth universal data interface was developed for the control system of the fuel cell city bus. On this platform, a series of wireless portable control auxiliary systems have been implemented, including wireless calibration, a monitoring system and an in-system programming platform, all of which are ensuring normal operation of the fuel cell buses used in the demonstration. 相似文献
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高压直流输电中的换流阀和SVC中TCR或TSC阀体,都是由晶闸管级串联组成的。每个晶闸管级由直流均压电路、交流均压电路、晶闸管控制单元和晶闸管组成,其中晶闸管控制单元是核心。本文首先指出高压串联硅堆中晶闸管控制单元所必须具有的几个基本功能;然后以大量的实际应用为基础,深入剖析了晶闸管控制单元的功能和原理,最后指出了该装置在研制过程中应该注意的一些事项。 相似文献
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Jianfeng HuaLanguang Lu Minggao Ouyang Jianqiu LiLiangfei Xu 《Journal of power sources》2011,196(14):5881-5888
The fuel-cell powered bus is becoming the favored choice for electric vehicles because of its extended driving range, zero emissions, and high energy conversion efficiency when compared with battery-operated electric vehicles. In China, a demonstration program for the fuel cell bus fleet operated at the Beijing Olympics in 2008 and the Shanghai Expo in 2010. It is necessary to develop comprehensive proton exchange membrane fuel cell (PEMFC) diagnostic tools to increase the reliability of these systems. It is especially critical for fuel-cell city buses serving large numbers of passengers using public transportation. This paper presents a diagnostic analysis and implementation study based on the signed directed graph (SDG) method for the fuel-cell system. This diagnostic system was successfully implemented in the fuel-cell bus fleet at the Shanghai Expo in 2010. 相似文献
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在纯电动汽车开发过程中,整车控制器的软件与硬件会频繁更新,为了快速匹配样件、提高测试效率、提升测试吞吐量,设计了通用自动化测试系统。该系统使用TestStand作为测试执行模块。在LabVIEW中开发了一套即时可用的测试动作库和驱动程序,动作库执行测试动作,通过TestStand引擎与驱动程序进行数据交互。设计了测试项目管理软件,覆盖VCU测试全过程并保证可追溯性。实际测试应用表明,该系统可以快速配置测试环境、生成可执行测试序列,能够高效地定位控制器缺陷,且运行稳定、通用性好。 相似文献
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Ameena Ahmadi 《Architectural Design》2015,85(1):46-53
Ameena Ahmadi is Architecture Manager at the Qatar Foundation, overseeing the development of the masterplan and facilities of Education City in Doha, a multi-institution educational campus, incorporating schools and universities. Ahmadi describes how education is a significant cornerstone for Qatar's national transition ‘to a knowledge-based’ economy from a ‘hydrocarbon-based’ one. This is symbolised by substantial investment in the flagship Education City with its Arata Isozaki masterplan and its individual schools and universities designed by premier international architects. 相似文献
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在高岭直流输电工程中,出现逻辑切换模块COL与VCU设备接口时信号相互依赖,造成直流系统停机现象.针对COL模块在工程应用中出现的问题,对COL模块的信号逻辑和VCU信号接口逻辑进行了分析,得出VCU发出的"VCU正常"信号对极控系统的"极控系统正常"信号的依赖,直接导致了VCU故障之后,VCU故障信号将一直存在,以致极控系统不可用,造成直流系统停机.并提出了改进方案,避免工程应用中出现盲点,造成不必要的系统停机,提高直流输电系统的安全稳定和可控性. 相似文献