查询词典 inductance

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"。

Considering the variation of the equivalent instantaneous inductance, an new algorithm based on the normalized equivalent instantaneous inductance for the discrimination between inrush and fault current is creatively proposed.

另外，从分析等效瞬时电感的变化入手，创造性地提出了一种基于归一化等效瞬时电感分布特性的识别励磁涌流和故障电流的方法。

A novel method for monitoring the state of transformer windings by identifying parameter of leakage inductance is presented in this paper, using Least Square techniques based on the equivalent equation of transformer leakage inductance. The mathematical model is derived for on-line identification of winding electrical parameter.

以变压器漏电感方程作为绕组参数在线计算的模型，提出了一种利用最小二乘算法进行绕组漏电感参数实时辨识从而实现绕组变形在线监测的方法，推导了用于变压器漏电感参数辨识的方程，针对参数的不可辨识问题提出了解决方案，分析了辨识结果产生误差的原因。

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。

This digital inductance reflectoscope reflector is based on the rule that the voltage the electric current will increase after the inductance added, because the speed of the voltage the electric currents' increases is related with the inductance quantity after the inductance added, therefore we can survey the inductance the inductance by the inductance quantity the survey electric current achieved some predetermined number how much time it takes.

本数字电感测试仪以电感加上电压后电流增加的规律作为测量依据，因为电感加上电压后电流增加的速度与电感量相关，所以通过测量电流达到某一预定值所用的时间就能测量出电感的电感量。

This digital inductance reflectoscope reflector is based on the rule that the voltage the electric current will increase after the inductance added, because the speed of the voltage the electric currents%26rsquo; increases is related with the inductance quantity after the inductance added, therefore we can survey the inductance the inductance by the inductance quantity the survey electric current achieved some predetermined number how much time it takes.

本数字电感测试仪以电感加上电压后电流增加的规律作为测量依据，因为电感加上电压后电流增加的速度与电感量相关，所以通过测量电流达到某一预定值所用的时间就能测量出电感的电感量。

It is presented that the equivalent circuit and formulae for calculating inductance parameters (self inductance and mutual inductance) of shunt reactor with auxiliary winding system in the paper.

提出带抽能线圈并联铁心电抗器的等效电路和电感参数设计公式，通过对这种特殊并联电抗器三维非线性磁场的有限元分析，准确地计算出电抗器的电感参数以及抽能线圈空载和负载情况下电抗器的伏安特性曲线。

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。

SEPIC (Single-Ended Primary Inductance Converter) is used from non-isolation DC-DC converter and applied it to the Stand-alone solar power charge controller. SEPIC integrates digital charge controller design, mix the constant current/voltage charge and maximum power point tracking in order to promote the efficiency of converter to whole system.

中文摘要本论文利用非隔离式DC-DC电力转换器中的SEPIC(Single-Ended Primary Inductance Converter)，将其应用在独立型太阳能充电控制器上，结合数位化充电控制器设计、混合定电流定电压及最大功率追踪控制，进而提升整体系统之电力转换效率。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。