查询词典 electric current

However, the RL/CD impedances electric circuit which is based on the current- feedback amplifier are few.

文献E33中，作者用电流传送器实现的高阶阻纳函数设计了多种高阶滤波器电路。

Company Profile Beijing Xinyu win equipment limited liability company operating mainly in the production and domestic and international advanced testing equipment, instrumentation, and diagnostic tools, as well as introduce advanced test, measurement of new technology for operating purposes. A: electrical fire, building fire detection and public safety facilities, equipment detectors B: lightning protection, lightning protection device detection equipment, mine detection device safety box C: Fire Fire Safety Inspection and Testing equipment, and investigate the cause of the fire equipment, police station fire alarm Services and equipment D: fire inspection and fire investigation equipment boxes, fire investigation kits, fire detection equipment to determine the scene Product E: Fire Engineering Detect boxes, cartons Detect building fire service installations, fire detection electrical box F: Airport Fire fire inspection equipment, subway Fire Safety Detect Box G: boilers, pressure vessels and special equipment, elevator equipment Detect H: Victoria seized power telecommunications equipment boxes, mechanical state patrol boxes I: Detect safety boxes, traffic accident investigation boxes, property management Detected me J: Public environmental hygiene Detect boxes, boxes of food safety at the scene detection, occupational health care at the scene Detect boxes, cartons Detect Radiological Protection at the scene, the situation of sanitation and disinfection Detected me, health production supervisor at the scene seized me K: Ultrasonic leak detector, ultrasonic spectrum analyzer, ultrasonic full-function fault detection system L: fire using infra-red thermal imaging, infrared imaging system for industrial use, the security-type infra-red thermal imaging M: Energy Conservation Supervision and Testing Instruments instrument N: Private Product: 3 1/2- 8 1 / 2 handheld / desktop Digital Multimeter, cross-DC clamp level pressure ammeter, temperature gauges, tachometer, digital megohm table, grounding resistance tester, desktop multimeter, digital frequency meter smart, figure synthesis / function signal generator, desktop digital electric bridge, oscilloscopes, infrared thermometer, vibrometer, digital DC regulated power supply, 5 1 / 2 hand-held multi-function calibrator field process instrumentation. O: agent Products:, infrared thermometer, infrared, ultrasonic full-function fault leakage / discharge detection device, flammable / toxic gas detector, harmonic power quality analyzer, portable ultrasonic flowmeter, insulation / Ground Resistance Tester, temperature, current / voltage, the process of signal, thermal resistance / thermocouple, pressure, loop calibrator, such as electronics, telecommunications, electricity, petroleum chemical industry, safety inspection, steel smelting, public environmental protection, fire detection Secret rescue, fire detection equipment, special equipment testing, military field equipment dedicated monitoring equipment and tools.

公司简介北京新宇胜利仪器有限责任公司主要以生产和经营国际，国内先进的检测仪器仪表和设备诊断工具以及介绍先进的测试，测量新技术为经营宗旨。A：消防电气、建筑消防设施检测和公共安全侦检仪器设备B：防雷、避雷装置检测仪器设备、防雷装置安全检测箱C：消防防火监督检测装备、火灾原因调查装备、公安派出所消防警务装备D：防火检查与火灾勘查仪器箱、火灾勘查工具箱、消防产品现场判定检测仪器E：消防工程检测箱、建筑消防设施检测箱、消防电气检测箱F：机场消防防火检查仪器设备、地铁消防安全检测箱G：锅炉、压力容器和特种设备、电梯检测仪器H：电信电源维检仪器箱、机械状态巡检箱I：交通安全检测箱、交通事故勘查箱、物业管理检测箱J：公共卫生环境检测箱、食品安全现场检测箱、职业健康监护现场检测箱、放射防护现场检测箱、卫生消毒状况检测箱、健康品生产现场监检箱K：超声波泄漏检测仪、超声波频谱分析仪、超声波全功能故障检测系统L：消防用红外热像仪、工业用红外热像仪、本安型红外热像仪M：节能监督检测仪器仪表工具N ：自有产品：3 1/2-8 1/2位手持/台式数字多用表，交、直流钳形高低、压电流表，温度仪表，转速表，数字兆欧表，接地电阻测试仪，台式多用表，数字智能频率计，数字合成/函数信号发生器，台式数字电桥，示波器，红外测温仪，测振仪，数字直流稳压电源，5 1/2位手持式多功能现场过程仪表校验仪。O：代理产品：，红外测温仪，红外热像仪，超声波全功能故障泄漏/放电侦测仪，可燃/有毒气体检测仪，电力质量谐波分析仪，便携式超声波流量计，绝缘/接地电阻测试仪，温度、电流/电压、过程信号、热电阻/热电偶、压力、回路校验仪等电子、通讯、电力、石油化工、安全检查、钢冶、公共环保、消防特勤侦检救援、消防检测设备、特种设备检测、军事领域的专用仪器监测设备与工具。

The arc furnace electric system will make appearance of more harmonic current at the series resonant point and the parallel resonant and influence of series resonant is larger for the system.

当电弧炉电气系统在串联谐振点和并联谐振点附近时，均会出较大谐波电流，而串联谐振对系统的影响更大一些。

Multi-meter operations and Basic DC circuits, Oscilloscope Operation, Function, Generator Operations, RC circuits, RL circuits, Rectifier circuits, Rectifier circuits and Voltage doublers, Ohm's Law, RC 、 RL Circuit, RLC Circuit, Diode Lab - Part 1, Diode Lab - Part 2, Measurement of Force Effects in the Electric Field, Basic Current Balance, Force Effect of Currents, Measurement of Magnetic Field of Single Coils, Magnetic Fields of Paired Coils in Helmholtz Arrangement, Hall Effect in p-Ge/n-Ge, Faraday's Law, Transformers, Microwave I, Microwave II.

电磁学实验( S0339)(1，1)基本电子零件、直流电路，示波器与信号产生器的认识与使用，电容、电感的电路特性，整流与滤波，倍压整流电路，欧姆定律实验，电容、电感的电路特性，电阻、电容、电感的电路特性，二极体的特性实验，二极体的特性实验、电场力效应实验、电流天平实验、电流力效应实验、螺线管磁场实验、赫姆霍兹磁场实验、霍尔效应实验、法拉第感应电动势实验、感应线圈变压实验、微波实验一、微波实验二。

According to the current running and coming development of the Electric Power System, this paper presents a reasonable approach using collection information for Hierarchic Fault Diagnosis.

本文根据电力系统目前的实际运行情况和今后的发展，提出了一种合理利用采集信息进行分层故障诊断的方法。

The measurement is simulated by ""regular icosahedron "" method, utilizing the direct current moment electric motor and the photoelectrical axis angle encoder, the rotation of the shot carrier and the CCD camera is completed, and can orientation the rotating angle, so that the system can make the CCD camera to measure the square diagraph in 16 independent projections.

该系统的研制是利用"正二十面体"方法进行模拟，直流力矩电动机和光电轴角编码器配合使用，完成载物台和CCD相机的旋转运动和角度定位，使CCD相机能够实现对十六个独立方向上的投影测量。

Department of Electric, Tsinghua University: impulsion high current technology, Beijing: Science Press, 1978: 77

清华大学电力系：冲击大电流技术。北京：科学出版社，1978：77。

The single a machine that should design to adopt serieses MCS-51s primarily conduct and actions main a measurement for, passing spreading feeling machine to the current of air measuring, its change is homologous pulse signal, this pulse signal through A/ D conversion with D/ A conversion after produce the certain electric voltage signal, will show the inceptive pulse signal a discharge for representing to come out at the same time.

该设计主要采用了MCS-51系列的单片机作为主要的芯片，通过传感器对燃气流量的测定，将其转变为相应的脉冲信号，这个脉冲信号经过A/D转换和D/A转化之后产生一定的电压信号，同时会将起初的脉冲信号所代表的流量显示出来。

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。

Owing to electromagnetic coupling of conductors, as well as incomplete balanceable transposition of transmission lines and asymmetry of three phase load, it forms a circuit of inductive current between the two ground wires or ground wires and the earth, so it produces electric energy loss.

由于导线的电磁耦合作用、线路的不完全平衡换位和三相负荷的不对称性，2根架空地线之间或地线与大地之间会形成感应电流回路，从而在地线上产生电能损耗。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。