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一种新的触头装置,主要是基于光伏系统中所用的旋转隔离开关。由于该旋转隔离开关应用于直流电源,因而在开关接通闭合时,对触头的各项参数性能要求比较高,其性能直接关系到隔离开关的电气性能和使用寿命。本文对隔离开关产品的触头装置的特点和结构进行了阐述,然后对本产品的直流灭弧的伏安特性进行了分析,并对触头装置整体性能进行测试,以验证产品是否满足规定的性能要求。 相似文献
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风道继电器作为重要信号转换装置,在我国主力电力机车四大通风系统的七条风道中都安装使用。但目前广泛使用的膜片式风道继电器在使用中暴露出的寿命低,可靠性差,触头烧蚀和随机失效等问题和缺陷较普遍。经分析发现继电器触头烧蚀的根本原因是产生振频烧蚀。随机失效的原因是冰雪异物堵塞。针对以上缺陷设计了微压膜片与负逻辑微动开关结合的新结构继电器。并对进气口进行自洁防堵设计,对接线螺柱进行了新型接线夹紧螺旋结构设计。经过对继电器动触头的动态参数优化,得到了优化解,对触头弹性系数和几何结构参数的确定提供了依据。经实际装车验证,新型风道机电器解决了存在的缺陷和问题,各项性能指标优良,运行稳定可靠。 相似文献
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一、触头压力测试装置600A及以上的HD13系列刀开关,成品出厂检查要求测触头压力,因其结构特点,中间一相的触头压力很难测量。我们根据行业的有关要求及开关的结构,设计制作了一台刀开关触头压力测试装置,其工作原理图如图1所示。 相似文献
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高压隔离开关自力型触指/触头结构仿真分析与优化设计 总被引:1,自引:0,他引:1
根据高压隔离开关自力型触指/触头机构服役工况,利用Solidworks软件建立自力型触指/触头有限元分析模型,在ANSYS Workbench集成开发环境(AWE)下对自力型触指/触头结构参数进行了优化设计,并分析了设计参数对自力型触指所受最大等效应力、剪切应力和变形的影响。结果显示:触头直径和触头摩擦行程与各响应变量之间均呈现出正相关关系,且触头直径的变化对响应变量的影响比触头摩擦行程对响应变量的影响更大。经多目标优化后,自力型触指/触头最佳结构参数为触头直径63.39 mm,摩擦行程15.24 mm。 相似文献
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40.5kV/2.5kA/63kA真空灭弧室作为363kV/5kA/63kA快速断路器串联模块的子单元,研究其内部电场强度分布以确保其绝缘性能,对于整套快速断路器装置的安全可靠运行尤为重要。根据实际参数搭建了40.5kV真空灭弧室的基本模型,利用Ansoft有限元计算仿真软件搭建了40.5kV真空灭弧室的仿真模型,进行了电场强度分布的仿真计算,得到了灭弧室中的动触头台阶倒角区域、动触头倒角区域、静触头台阶倒角区域、静触头倒角区域的电场强度最大,最有可能发生击穿的结论。提出了通过改变台阶倒角和触头倒角以改善电场分布进行优化设计的建议,并利用Ansoft仿真软件进行改变台阶倒角值和触头倒角值后的仿真计算,得到了触头台阶处倒角取值2mm、动静触头倒角2mm或3mm的设计较优,只设置1个触头片时触头倒角取值3mm设计较优。 相似文献
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Basic information on modeling and digital computer simulation of variable-reluctance (VR) step motors is provided. The nonlinear equations of the system are derived, and a method for implementing them on a digital computer is presented. As an example, a typical printer with a step motor is designed with this approach. The problem is defined by giving the desired system performance criteria and the step motor parameters and characteristics. The specification of the control schemes determined the design. Computer simulation runs are made to determine the optimal control parameters of the system. The case study demonstrates the advantages of the computer-aided design, before the physical construction of the experimental system. 相似文献
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为了实现步进电机在有限的时间内快速启动、高速高精度地运行,本文设计了一种步进电机变速控制系统。完成了以P89C51单片机为核心,外加DM4242驱动器的搭建硬件系统,利用Proteus结合Keil对设计程序进行仿真,并将仿真波形和实际的变速曲线在硬件系统上进行了试验验证,得到了预想的加减速曲线。结果表明该方法在步进电机的加减速控制系统设计中的可行。胜。 相似文献
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一种新型同步电动机励磁装置 总被引:2,自引:0,他引:2
叙述了一种新型同步电动机励磁装置的几种控制功能和特点。介绍了失步保护原理、实现方法和如何实现投励。该装置的整流回路采用三相全控桥电路,缩短了投励、灭磁响应时间,投励转差设定方便,投励时间准确。 相似文献
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A. V. Gulyaev E. E. Ten D. S. Fokin S. A. Shukharev 《Russian Electrical Engineering》2016,87(2):93-96
Auxiliary machines of electric trains provide the operation of traction motors and electrical and pneumatic equipment. The main condition of safe operation of the asynchronous electric drive of auxiliary machines is the maintenance of the operation mode of the electric drive in terms of the basic technical data, according to which NVA-55 electric drives are matched by nominal operation (long-term) mode S1. The effect of supply voltage on the operation of locomotive auxiliary machines is considered. Auxiliary machines are used under poor conditions on alternating current electric trains. Disbalance of the motor currents occurs even at nominal voltage of the overhead contact system and operable phase-shifting device. In operation, the voltage on the contact wire line is not constant and the equipment modes can be inconsistent with the nominal one, which leads to a significant number of failures of auxiliary equipment. This makes it necessary for the microprocessor control system to use the controlled auxiliary electric drive. An individual autonomous inverter with fully balanced sinusoidal output voltage allows one to increase the reliability of the induction motor drive, while the proportional control of the blower motor reduces the power consumption. 相似文献
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The design, construction, and operation of experimental models of a dc-type hybrid step motor are discussed. This form of hybrid motor consists of a variable-reluctance step motor, the rotor of which is appropriately wound as a multipole dc motor. A computer-aided design procedure is discussed that is used to obtain the optimum parameters of the dc portion of the hybrid motor. The results obtained with two experimental models of this type of hybrid motor are presented. Both prototypes show a marked improvement in the running torque characteristics due to the dc windings. Torque-speed curves indicate load torques of 400 oz-in available at speeds up to several thousand revolutions per minute with one of the proto-types. This type of hybrid motor may be controlled in one of three different ways: a pure step motor, a pure dc motor, or a dc-aided step motor. The relative advantages, disadvantages, and application of each control mode are discussed. Several control strategies-open and closed loop-are presented for speed control as well as point-to-point type control of position. The practical feedback feasibility of this concept for high-power applications in the integral horsepower range is discussed. 相似文献
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