共查询到19条相似文献,搜索用时 633 毫秒
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黄宇 《机电产品开发与创新》2020,33(3):84-86
为了提高系统的稳定性和延长继电器的使用寿命,至关重要的一点是要研究继电器的电磁特性。运用CATIA软件建立继电器电磁系统的有限元模型,对继电器的电磁激励力进行求解,对工作气隙的五个位置进行仿真,得到五种工作气隙下的磁场强度和磁矢量云图,并分别计算继电器电磁吸力与施加在线圈上的电磁激励间的关系。对安匝数不同的电磁机构进行仿真,得到不同安匝下的电磁力曲线。根据仿真结果可知,电流不变时,随着工作气隙的减小动铁芯所受到的电磁增大;随着电流增大以及继电器线圈的安匝数增大,受到的电磁力也随之增大。 相似文献
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通过建立基于ANSYS电磁阀组件的电磁分析模型,得到其磁力线、磁通密度、电磁强度、电磁力,分析稳态状态下电磁力与电压的二次关系,并通过MATLAB建立F/U的拟合关系式,从而对驱动电压进行优化设计,并可对电磁阀组件的结构参数如电磁铁形状、线圈匝数、吸合面积、磁性材料、复位弹簧参数等进行优化设计。 相似文献
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电磁阀指的是在流体(空气、气体、蒸汽和液体)的路上有受电磁力作用进行开或闭的阀。例如,在控制线圈上不通电时,由于可动铁芯受弹簧的反作用力作用而与固定铁芯脱开,阀处于闭锁状态。反之,在控制线圈上通电时,可动铁芯由于克服了弹簧的反作用力的作用与固定铁芯吸在一起,阀处于打开位置,流体便可流出。利用这种电磁阀可以把电气系统的工作变换成运动系统的工作,它的用途广泛。例如,在温度控制、空调系统、医疗机械、NC机床、工业机器人、工业检测等方面都 相似文献
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基于电磁感应原理及中医按摩手法设计了一种可用于按摩机器人的新型电磁式叩击按摩头,具有便携通用的特点。通过模型分析,建立电磁力、弹簧负载力、人体阻力之间的数学关系,得出按摩头动态特性影响因素。采用正交试验法,对电路和磁路的影响因素进行敏感度求解分析,获得电磁力度计算结果。选择线圈匝数、线圈电流以及动铁芯到轭铁的距离这3个因素,将每个因素分为3个水平,组合得到9组试验方案。仿真实验结果显示,线圈电流是设计的按摩头模型电磁力的主要影响因素,因此可先确定2个次要因素的参数,实现按摩头结构优化,最后通过调节线圈电流进行按摩力度调控。 相似文献
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The methods of improving the dynamic performance of high speed on/off solenoid valve include increasing the magnetic force of armature and the slew rate of coil current, decreasing the mass and stroke of moving parts. The increase of magnetic force usually leads to the decrease of current slew rate, which could increase the delay time of the dynamic response of solenoid valve. Using a high voltage to drive coil can solve this contradiction, but a high driving voltage can also lead to more cost and a decrease of safety and reliability. In this paper, a new scheme of parallel coils is investigated, in which the single coil of solenoid is replaced by parallel coils with same ampere turns. Based on the mathematic model of high speed solenoid valve, the theoretical formula for the delay time of solenoid valve is deduced. Both the theoretical analysis and the dynamic simulation show that the effect of dividing a single coil into N parallel sub-coils is close to that of driving the single coil with N times of the original driving voltage as far as the delay time of solenoid valve is concerned. A specific test bench is designed to measure the dynamic performance of high speed on/off solenoid valve. The experimental results also prove that both the delay time and switching time of the solenoid valves can be decreased greatly by adopting the parallel coil scheme. This research presents a simple and practical method to improve the dynamic performance of high speed on/off solenoid valve. 相似文献
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给出超磁致伸缩换能器驱动磁场均匀性概念后,论述了超磁致伸缩换能器驱动磁场宜用电磁感应强度表示。建立了ANSYS2D有限元模型,分析了超磁致伸缩棒、线圈长度、磁路闭合与否、补偿线圈等对磁场均匀性的影响,得出了明确的结论。该分析结果已经用于指导超磁致伸缩换能器的设计,取得良好的效果。 相似文献
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介绍了一种由2个二位三通换向球阀集成于一体的数字开关阀。该阀的阀体部分可作为电磁铁轭铁,衔铁部分可作为放大杠杆,从而使阀体和杠杆成为磁路的一部分。电磁线圈密封于阀体内,有良好的耐压性。因此,该阀适用于在海洋环境水下作业的液压系统。文中重点研究了位于电磁铁铁芯头部与衔铁接触处,能够咬合的特殊锯齿结构。在不同结构和几何尺寸下,利用有限元分析软件ANSYS对于电磁铁铁芯和衔铁部分进行了电磁场数值分析,得出电磁吸力特性曲线。仿真结果表明,这种具有特殊锯齿结构的电磁铁,在咬合前期具有较大的吸合力,咬合后期吸合力逐渐减小,因此能减小撞击且具有较高的响应频率。 相似文献
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为提高磁流变先导式溢流阀的压力特性,对磁流变先导式溢流阀导阀(简称磁流变先导阀)进行结构设计和性能研究。采用圆环形和圆盘形组合式阻尼间隙,选择双激励线圈反向通电的方法,达到优化磁场结构即提高磁场利用率的目的。利用Ansoft Maxwell仿真对间隙宽度分别为0.8, 1, 1.2 mm 的3种阻尼间隙进行电磁场仿真,并确定最优阻尼间隙宽度。利用CFD仿真对磁流变先导阀的内部流场进行分析。对磁流变先导阀进行压力特性实验,实验测得单激励线圈通电、双激励线圈反向通电时,磁流变先导阀调定压力与加载电流的关系曲线。分析实验结果得出:磁流变先导阀的结构设计合理,提高了磁流变先导阀的调压能力及响应速度,调定压力与电流成正比,最后达到最大调定压力。 相似文献
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Su Yufeng Chen Wenyuan Cui Feng Zhang Weiping 《The International Journal of Advanced Manufacturing Technology》2006,30(3-4):215-220
We present a parallel dynamic passive valveless micropump, which consists of three layers-valve, diaphragm and electromagnetic coil. The valve is wetly etched in a silicon wafer, the diaphragm is a polydimethyl siloxane (PDMS) film spun on a silicon wafer with embedded permanent magnet posts, and the coil is electroplated on a silicon substrate. Under the actuation of the magnetic field of the coil, the flexible diaphragm can be displaced upwards and downwards. After analyzing magnetic and mechanical characteristic of the flexible membrane and direction-dependence of the nozzle, this paper designed a micropump. And the relative length (L/d) of the micropump's nozzle is 4. A 7×7 array of permanent magnetic posts is embedded in the PDMS film. Two diaphragms work in an anti-step mode, which can relieve the liquid shock and increase the discharge of the micropump. ANSYS and Matlab are adopted to analyze the actuation effect of the coil and the flow characteristic of the micropump. Results show that when actuated under a 0.3 A, 100 Hz current, the displacement of the diaphragm is more than 30 μm, and the discharge of the micropump is about 6 μL/s. 相似文献