查询词典 inductance capacitance coupled circuit

To solve the matter between the capacitance sensor circuit's predigestion and the uncertainty of measurement, a method that using switch capacitance theory for the research of capacitance sensor is put forward.

为解决电容传感器电路简化与测量不确定度之间的矛盾问题，采用将开关电容理论引入到电容传感器中的方法。

The results of simulation show that three-winding single-phase capacitance motors with wye-connected drive ventilated machine load can proceed to AC braking to realize fast stopping. The capacitance number of changes can regulate system braking stopping time. When capacitance is certain, can establish the resistance to limit the electric current and electromagnetical torque in stator circuit during the braking process, regulating braking stopping time.

仿真结果表明，Y接法的三绕组单相电容电动机带通风机负载时可以进行交流制动实现快速停车；通过改变电容的数值可以调节制动停车的时间；当电容一定时，可以在定子电路中串联电阻来限制制动过程中的电流和电磁转矩，调节制动停车的时间。

The converter can be improved just by exchanging the position of the resonant inductance and the transformer such that the transformer is connected with the lagging leg. The improved converter has several advantages over its counterpart, e.g., the clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. The operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. The effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined.The improved converter is adopted to design the DC/DC converter of secondary power supply in HVDC power system.

本文将谐振电感和变压器交换位置，使变压器与滞后桥臂相连，这样箝位二极管在一个开关周期中只导通一次，同时零状态时谐振电感电流较小，有利于提高变换效率和减小占空比丢失，本文分析改进后变换器的工作原理，并与改进前的变换器进行对比，讨论隔直电容在不同位置对变换器工作的影响，确定一种最佳工程方案。

Equivalent inductance: the single self-inductance corresponding to the series or parallel combination of multiple inductors including the effect of their mutual inductance.

一个结论是：电感和环路的形状有很大关系；减小电感的有效方法之一就是在参考平面上方布线，这样，环路的面积就是"走线的长度×介质厚度"。

ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.

本论文针对车载异步电机在矢量控制器所遇到的问题：定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案：分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算，分析出对于电流型逆变器在采用定子磁场定向时，其性能同时具有矢量控制和直接转矩控制两者的优势，并对电压型逆变器在转子磁场定向下的模型进行了仿真研究；建立异步电机非线性模型，推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程，并做出了仿真结果，建立异步电机在非线性模型下的矢量控制调节器的PI参数设计，在实际应用中，若忽略电机电感的动态变化，可以根据当前的磁路饱和状态而在线修正电感参数，从而将非线性方程线性化，降低控制器的复杂度；考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出，本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题；推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通，用于实现高性能的矢量控制算法，并给出了仿真结果；推导出了电动汽车恒转矩给定的闭环回馈制动系统，实现了电动控制模型和制动模型的统一，而且结合铅酸电池最大充电电流的要求，为制动转矩在线给定建立了数学模型；设计了基于双DSP系统的高性能矢量控制器软硬件框图，并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。

The general calculation method of equivalent self-inductance coefficient of non-mutual-inductance-coupling two-end self-inductance network has been studied.

探讨无互感耦合的任意二端自感网络等效自感系数的一般计算方法。

Based on method of moment and field-circuit coupling theory, nodal method of analysis in circuit theory is applied to the power parameters calculation of grounding grids. The inner self-resistance and self-inductance of conductors, mutual inductance between conductors, and displacement current of conductors are taken into account.

基于矩量法和场路结合的思想，将电路中的节点电压法用于接地网工频参数计算中，该方法不仅考虑了接地导体的内自阻抗和自感，而且考虑了导体间的互感，导体的位移电流。

The physics of the noise mechanism that is based on pair of active first detector understands, noise was used to eliminate a technique in circuit, twinkle in order to reduce what the switch in Gilbert first detector is in charge of noise, introduce an additional inductance and switch to be opposite in all the parasitism capacitance of source node is syntonic, the sonic system of a confusion of voices that improves whole circuit is counted and change gain to wait for crucial function index.

基于对有源混频器的噪声机制的物理理解，电路中采用了噪声消除技术，以减少Gilbert型混频器中开关管的闪烁噪声，并引入一个额外的电感和开关对共源节点的寄生电容谐振，改善整个电路的噪声系数和转换增益等关键性能指标。

The equivalent circuit of signal path of high frequency relay was built by extracting the parasitic capacitance, inductance and resistance of signal path, based on the classical transmission line theory and partial element equivalent circuit method.

通过经典传输线理论及部分元等效电路(partial element equivalent circuit，PEEC)方法，对高频继电器常闭型信号传输路径的分布电容、电感、电阻等参数进行提取，建立信号传输路径的等效电路模型。

The static, modal and harmonic analysis was performed in ANSYS; static capacitance, natural frequencies for the short circuit case and the open circuit (anti-resonance) case, dynamic resistance, frequency at half-power point, dynamic inductance and mechanical quality factor were computed via static, modal analysis and harmonic analysis.

为了加速低频超声雾化栽培喷头的设计制造进程、降低研发成本，该文提出了其阻抗的测试原理电路图，建立了阻抗分析的有限元模型，在大型通用有限元分析软件ANSYS中进行了静态分析、模态分析和谐响应分析。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。