The dc input voltage to the converters is assumed to have zero internal impedance. 我们假设换流器的直流输入电源的内阻为零。
Switching and measuring voltage sources with high internal impedance are subject to a number of errors, including offset currents, stray leakage paths, and electrostatic interference. 切换和测量具有高内阻的电压源会受各种误差的影响,包括偏移电流、寄生漏泄通路,以及静电干扰。
Then, comparisons of the effects of arterial compliance, peripheral resistance, length, internal radius and wall thickness on the input impedance were made based on the recursive algorithm. 在此基础上比较不同动脉顺应性、外周阻力和动脉长度、内径、壁厚等参数对输入阻抗的影响。
The results show that the instrument is appropriate for testing the internal impedance of Ni-MH and Li-ion battery. 测试结果表明,该仪器的功耗达到了实用性,精度较好地满足了电池的内阻测试要求。
This paper presents a method of the lead-acid battery internal resistance measurement based on AC impedance method. 给出了一种基于交流阻抗法的铅酸蓄电池内阻测量方法。
A surface integral equation is derived for solving dielectric scattering problems. It avoids the internal resonance phenomenon, and smaller dimensions of the impedance matrix are obtained by comparison with the volume integral equation. 推导一种用于求解介质体散射问题的面积分方程,它克服了内谐振现象,且同体积分方程相比,获得了更小的阻抗矩阵维数。
Analysis of the Internal Line Influencing Impedance Relay Performances 影响阻抗继电器动作性能的内部电路分析
The impedance of lateral-resisting pile influenced by axial load is derived by means of a transfer matrix method for layered viscous-elastic soils to obtain the displacements and internal forces of the pile-foundation in frequency-domain, which is helpful to deriving the impedance of pile-groups. 利用传递矩阵法,全面推导层状黏弹性土中考虑轴向力影响的水平抗力桩阻抗,并以此寻求频域动载下的基桩变位及其内力规律,为有效地进行桥梁群桩阻抗理论推导奠定基础。
The difference of catalytic activity between PtSn/ C with various Sn molar fractions may be caused by the particle size effect, alloying degree between Pt and Sn and the cell internal impedance. 导致不同比例PtSn催化剂活性差别的原因可能是由于Sn与Pt间的合金化程度不同和催化剂粒子尺寸效应及Sn含量对电池阻抗等几方面因素所致。
The results show that the electrode made from the modified materials have small internal impedance, high charge and discharge capacity and good cycle life. 结果表明,这种材料制备的电极,不仅内阻小,而且有高的充放电容量和好的循环寿命。
Numerical Calculations of Internal Impedance of Cylindrical Conductors 圆导线内阻抗的数值计算
Internal Impedance Analysis of Dye-Sensitized Solar Cells 染料敏化太阳能电池的内部阻抗分析
A novel method for measuring the conducted EMI feature of an off line converter is proposed. By this measurement, the equivalent conducted EMI sources and internal impedance can be easily educed so as to guide the design of EMI filter effectively. 提出了一种适于测量离线式变换器传导电磁干扰特性的新方法,可以便捷地测出离线式变换器传导电磁干扰的等效干扰源和等效内阻抗特性,有效地指导电源EMI滤波器的设计。
Study of Instrument for Testing the Internal Impedance of Battery on Line 蓄电池内阻在线监测装置的研究
The effect on the generator excitation magnetic field is different when the capacity and power factor of load are different, and the effect on the internal impedance voltage drop is different, too. 而不同容量的负载,以及负载的不同功率因数,对同步发电机励磁磁场的作用是不同的,对同步发电机的内部阻抗压降的作用也是不一样的。
The paper analyzes in detail the issues of internal current distribution of the traction network, impedance characteristics, voltage loss and power loss, power supply capability of the network and the influence to the capacity of main transformer and obtains relative conclusion. 本文对该方式在网络内电流分布、牵引网阻抗特性、网络内电压损失和电力损失、网络供电能力以及对主变压器容量的影响等问题进行了详细的分析,得出了相应的结论。
The article discusses the failure mechanisms of valve regulated lead acid battery, in succession analyses exised question of the normal method, finally introduces methods of VRLA failure prediction by monitoring battery internal impedance. 本文讨论阀控铅酸蓄电池故障机理,分析现行电池故障预测方法存在的问题,介绍通过测量电池内阻预测阀控铅酸蓄电池故障的方法。
The realizing method for calculating the system internal equivalent impedance by general full-wave Fourier algorithm is analyzed. With a calculating example, it is indicated that the method will cause higher error because of decaying DC component. 首先,分析了一般全周傅氏算法在计算系统等值内阻抗时的实现方法,计算示例显示该方法由于受短路电流非周期分量的影响,会产生很大的误差。
Calculation of the internal impedance of wire for the transient simulation in transformer windings 用于变压器线圈暂态分析的导线内阻抗的计算
Values of battery conductance/ internal resistance measured by alternating impedance method would be disturbed by alternating frequency, alternating amplitude and operation mode of battery, especially by contact resistance. 用交流阻抗法测得的电池电导(或内阻)值会受到交流信号的频率、幅度、电池工作状态的影响,尤其要受到接触电阻的干扰。
Failure prediction of valve regulated lead acid battery by monitoring battery internal impedance 用内阻法预测阀控铅酸蓄电池故障
Because of the residual capacity's nonlinear relation to internal impedance of batteries, this paper uses the Grey Model GM ( 1,1) to forecast the failure of batteries, which can replace the traditional battery test and produces satisfactory effects. 依据蓄电池内阻与剩余容量之间的非线性关系,采用灰色预测系统的GM[1,1]模型,实现对铅酸免维护蓄电池失效的预测。这种方法取代了传统的电池容量试验方法,取得了很好的效果。
The voltage compensation strategy, which takes the internal impedance of the compensating device into account, is also analyzed. 并且分析了在考虑补偿装置内阻抗情况下的电压补偿策略。
In this paper, according to the principle of the Duffing chaotic oscillator to detect weak signal and the theory of AC internal impedance detection theory, the method of internal impedance based on chaotic theory on-line measurement is studied. 本文根据Duffing混沌振子检测微弱信号的原理结合交流阻抗法检测蓄电池内阻的原理,研究了一种基于混沌理论的蓄电池内阻在线检测的方法。
It can reduce the design of anti-interference circuit and the measuring circuit is simplified. So it plays an important roles in achieve internal impedance on-line measuring. 该方法能够减少抗干扰电路的设计,简化测量的电路,在蓄电池内阻的在线检测方面具有重要的意义。