1)  mutual inductor
互感线圈
1.
The ways to judge homonymous ends of two mutual inductors proposed by the teaching material Eletrotechnics are complex in process,especially in the process of many mutual inductors,which often make students puzzled.
在应用教材《电工学》中所提的方法来判定两个互感线圈的同名端,过程较为繁琐,特别是遇到具有多个互感线圈的情形时就更为复杂,使学生容易造成混乱。
2)  Mutual inductance
互感
1.
Case study of reliability induced by coil mutual inductance effect of the double-coil relay;
双线圈继电器线圈互感效应导致的可靠性问题案例研究
2.
Studying series-parallel connection of mutual inductance coil with transformer;
利用变压器研究两个互感线圈的串并联
3.
Application of Laplace in analysis of mutual inductance component circuits;
拉普拉斯变换在互感电路分析中的应用
3)  mutual induction
互感
1.
This article gives a method to calculate the magnetic field at far points of a circular current by mutual induction.
利用互感计算圆电流远处的磁场 。
2.
By applying the law of energy transformation and conservation in electromagnetism to a sinusoidal steady state linear exchange network,the aauthors obtain a new expression of the law in which the merits of such energy forms as resistance,capacitance,self induction and mutual induction of four kinds of elements are embodied.
利用式中统一体现的电阻、电容、自感和互感4种元件能量形式的优点,以及网络现代场论关于元件复阻抗率和积分形式的复阻抗等概念,分别给出4种元件具体的积分形式复阻抗。
3.
The self-induction and mutual induction of two coaxial linked solenoids are calculated in this paper.
本文对两个同轴螺线管串接后的自感、互感进行了定量计算,并对某些特殊情况也进行了推导,同时指出了某些论述之误。
4)  the gradients of mutual inductance
互感梯度
1.
The self and mutual inductances are calculated by Gauss quadratic technique, After analyzing the gradients of mutual inductance are computed analytically and more accurately.
经过分析计算,互感梯度计算结果更加精确。
5)  transformer
互感器
1.
Scheme of measuring temperature of high voltage electronic potential transformer vessel;
一种高压电子式互感器腔体内温度测量方法
2.
Calibration method and development trend of high voltage transformer;
高电压等级电压互感器的校验方法
3.
Comprehensive query and management system for checkout and demarcation record of watt-hour meter and transformer;
电能表、互感器检定记录综合查询管理系统
6)  Mutual inductance coupling
互感耦合
1.
Factors that affect the mutual inductance coupling have been studied based on this model, including magnetic core material, position of the primary winding, winding method of the secondary winding and its position.
基于此仿真模型,研究了影响非接触电能传输系统互感耦合的因素,包括磁芯材料、原边导线的位置、副边线圈的绕线方式以及绕线位置等因素。
2.
Because the equivalent parasitic parameters of the capacitance and inductance of the EMI filter may affect EMI performance under highfrequency conditions,the mutual inductance coupling between equivalent parasitic parameters of highfrequency apparatus is used to improve the highfrequency performance of t.
在高频状态下,EMI电源滤波器的电容器和电感器所带有的等效寄生参数会影响EMI高频性能,基于此提出了利用高频元器件的等效寄生参数间的互感耦合改善滤波器高频性能的措施,考虑了差模电感与电容器的寄生串联电感之间存在互感耦合以及2个串联支路的串联电感之间存在耦合电感2种情况。
3.
Based on the principle of mutual inductance coupling,this system adopts to the techniques such as DDS and realized the accurate testing of the quality parameters of electronic labels.
系统基于ARM嵌入式硬件平台,根据互感耦合原理,应用DDS频率合成技术、FIFO数据缓冲结构及数字信号处理技术实现了电子标签质量参数的精确测量。
参考词条
补充资料:电力系统电压互感器谐振过电压


电力系统电压互感器谐振过电压
resonance overvoltage due to potential transformer in electric power system

  南定理,可将三相对地电容等效连接在电撅变压器和互感器的两个中性点之间,由此着出,谐振属于零序性质。无论是电源合闸至空载母线所引起的电压互感器的涌流现象,还是线路中发生对地闪络和熄弧后C。中残余电荷经电压互感器放电所引起的磁饱和现象,都会在一定的C0值下激发起谐振过电压,它表现为电力系统中性点发生位移,并全部反映至开口三角形绕组,引起虚幻的接地故障信号。这是配电网中造成故障最多的一种内部过电压. 图1中性点不接地系统中三相电压 互感器接线图和等效谐振回路(a)三相电压互感导接线图;(b)等效谐振回路 由于谐振的零序性质,导线的相间电容、余弦电容器和传愉的三相有功负荷均对谐振不起作用。 随着C。的增加(即导线增长),将依次发生高频、工频和分频谐振。在很短的空母线合闸时,C0很小,会产生3倍以上的高频谐振过电压。较大的c0则会出现工频谐振过电压,此时一相对地电压很低,其它两相的对地电压接近于线电压,故工频谐振和单相接地现象往往难以区别。当母线上的出线较长时,C。很大将会发生分频谐振,其频率略低于电源颇率的一半,电压表的指针会发生低频摆动,谐振电压分t和开口三角形电压接近于相电压,由于此时谐振频率和相应的励磁感抗减半,互感器趋于深度磁饱和,励磁电流急剧增大,高达额定值的数十倍以至百倍以上,从而造成互感器的发热、喷油以至爆炸。在高频和分频谐振时,三相对地电压同时升高。 可以通过两种途径来抑制上述谐振现象.其一是采取阻尼吸能措施,即在开口三角形绕组两端临时并接一个低值电阻(在6一10kV小电网中,可用200~50ow的白炽灯泡)或将互感器高压中性点经大电阻接地。其二是破坏谐振条件,即人为地增大对地电容使之超过某一临界值,或将开口三角形绕组临时短接,或将互感器高压中性点临时不接地,或将电网改为通过消弧线圈接地。d旧nl一x一tongd旧nyo hugonq一x旧zhen guod{anyo电力系统电压互感公谐振过电压(resonanceovervoltage due to potential transformer inelectrie power system)电磁式电压互感器由于铁芯磁饱和引起的铁磁谐振过电压。在中性点不接地和直接接地电力系统中均有可能发生. 中性点不接地系统中电压互感器的谐振过电压图1中电源变压器的中性点不接地,电压互感器的中性点直接接地,其励磁电感La、L。和Lc分别与导线和母线的对地电容C。相并联而形成谐振回路。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。