共查询到20条相似文献,搜索用时 156 毫秒
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X5040、X6040、X6140型升降台铣床电气采用WJ1-20/10微电子型多功能继电器控制,设备使用一年多时,控制快速电磁离合器的输出触点出现故障.文中采用外挂中间继电器切换快速电磁离合器和进给电磁离合器,恢复了原机床功能. 相似文献
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产业园区企业多,为解决各企业用电情况复杂、物业管理难以及时常出现用电设备短路、漏电伤人等问题,采用智慧配电系统,实现对产业园区内供配设备、供电线路的实时在线监控.智慧配电系统具有集中管理产业园企业用电状况和预付费功能,具备采集用电设备的电流、电压、温度以及漏电等用电参数和智能开关的分合状态,有效预防了供配电线路漏电及火... 相似文献
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介绍一种车载多架无人机快速供电测试和启动系统的设计,包括车载地面检测计算机、直流电源、电气控制装置、发射箱供电测试及启动装置、地面检测计算机、供电测试接口装置和车载配电网络。其中车载直流电源为无人机供电测试和发动机启动提供电源;地面检测计算机发出的供电测试、启动指令送给电气控制装置,通过供电测试接口装置、车载配电网络向无人机供电,当无人机测试正常后,则可进行发动机启动。发动机的启动电源采用多个发射箱启动直流母线并联供电。该系统提高了多架无人机供电测试和启动发动机的自动化程度。 相似文献
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地铁列车继电器触点可靠性及对策研究 总被引:1,自引:0,他引:1
阐述了广州地铁3号线北延线列车继电器触点的实际应用环境,进一步对列车继电器触点的可靠性进行了论证,并提出了提高继电器触点可靠性的方法。 相似文献
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许多设备故障是各种低压电器在长期使用中,元件老化并缺乏经常性维护而产生。本文介绍了低压断路器、接触器、热继电器的常用低压电器的故障实例;从触点系统、电磁系统和灭弧装置故障检修三方面,分析说明了常用低压电器的检修措施及其要领。 相似文献
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Intelligent vehicle electrical power supply system with central coordinated protection 总被引:1,自引:0,他引:1
The current research of vehicle electrical power supply system mainly focuses on electric vehicles (EV) and hybrid electric vehicles (HEV). The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect;electrical/electronic devices (EEDs) applied in vehicles are usually directly connected with the vehicle’s battery. With increasing numbers of EEDs being applied in traditional fuel vehicles, vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively. In this paper, a new vehicle electrical power supply system for traditional fuel vehicles, which accounts for all electrical/electronic devices and complex work conditions, is proposed based on a smart electrical/electronic device (SEED) system. Working as an independent intelligent electrical power supply network, the proposed system is isolated from the electrical control module and communication network, and access to the vehicle system is made through a bus interface. This results in a clean controller power supply with no electromagnetic interference. A new practical battery state of charge (SoC) estimation method is also proposed to achieve more accurate SoC estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel. Optimized protection methods are also used to ensure power supply safety. Experiments and tests on a traditional fuel vehicle are performed, and the results reveal that the battery SoC is calculated quickly and sufficiently accurately for battery over-discharge protection. Over-current protection is achieved, and the entire vehicle’s power utilization is optimized. For traditional fuel vehicles, the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture, enhancing system reliability and security. 相似文献
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在液体输送中,对液体的定量控制多采用单片机和液晶显示来进行设定,操作复杂;而该流量设定控制仪,利用时钟指针式设定方式,结构简单、操作直观、成本低廉,通过配接继电器或接触器来控制安装在管道上的断流设备,达到定量控制的效果。 相似文献
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随着轨道交通的快速发展,对机车和车辆上的电气元件进行精细化的快速维护和测试是检修通过能力的有力保证。近年来为了降低机车的故障率,一些过流继电器、热继电器、时间继电器等电器元件的检测,也被列入到检测科目中。智能化的试验检测设备中采用了计算机控制、信号变送器、精密可调电源等技术也被应用其中。 相似文献
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Application of smart passive damping system using MR damper to highway bridge structure 总被引:1,自引:0,他引:1
Kang-Min Choi Hyung-Jo Jung Sang-Won Cho In-Won Lee 《Journal of Mechanical Science and Technology》2007,21(6):870-874
Magnetorheological (i.e., MR) dampers are one of the most prospective semiactive control devices for civil engineering applications
to earthquake hazard mitigation, because they have many advantages such as small power requirement, reliability, and low price
to manufacture. A smart passive system based on an MR damper system without including a power supply, controller, and sensors
consists of an MR damper and an electromagnetic induction (i.e., EMI) system that uses a permanent magnet and a coil. The
electromotive force induced by movement of a structure can control MR damper effectively without any external power supply
and control algorithm. This smart passive control system is implemented to verify the effectiveness for seismic protection
of benchmark structural control problem for the seismically excited highway bridge, which is based on the newly constructed
91/5 highway over-crossing in Southern California. The results of the numerical simulations show that the presented control
system can be beneficial in reducing seismic responses of benchmark bridge structure. 相似文献
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针对小型无人机电源紧张、尺寸小、载重量低、飞行速度低的特点,机载吊舱平台的环控系统设计需要满足飞行包线范围内的制冷需求。结构紧凑、重量轻、低功耗的环控系统成为了无人机飞行器研究的重要课题。文中提出了一种对冲压空气压头进行补偿的新型空液换热子系统并将其应用于小型无人机的环控系统设计,阐述了该系统的设计思想和关键技术。采用6SigmaET软件进行了空液换热仿真,结果表明系统换热量达到1.6 kW。实验验证结果也说明该空液换热子系统增强了环控系统低空低速区域的制冷能力。综上所述,本系统是适用于小型无人机机载吊舱的一种经济、高效的环控系统。 相似文献
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