电流

The thesis also introduced the principle and the parameter of urrent-sensor, expounded the running principle of cycloconverter, and described the waveshape of the output voltage and current. moreover, this paper introduced the technology of the data collect,too.

本文还介绍了霍尔电流传感器的工作原理及传感器的各种参数，阐述了交-交变频器的工作原理，对其输出电流电压波形做了简单的描绘，此外，本文对数据采集技术也作了比较详细的说明。

The samples with a diameter of 14mm have a nonlinear coefficient of about 50, a breakdown electric filed of about 350V/mm and a leakage current of less than 5μA, and the withstanding surge peak current of 8/20μs waveshape is about 2kA, which meet practical requirement.

获得电性能接近实用化的SnO2压敏陶瓷样品，其压敏电压V1mA约为350V/mm，非线性系数α达到50，漏电流小于5μA，并且在8/20μs脉冲电流冲击试验中，直径14mm的样品能够经受2kA的脉冲峰值电流。

In this paper, V connection transformers are chosen;cophase power supply systems based on active filter and V connection are studied. By controlling filter with real time detecting methods balances three phases, filter reactive and harmonic currents.

本文选择了&V&型变压器，研究了基于有源滤波器和&V&型变压器的同相供电系统：通过实时检测系统的综合补偿电流，控制有源滤波器，平衡三相，滤除无功和谐波电流。

Two points' correction is used to fit the curve of MOSFET V to I. According to this curve, the SMC modifies the value of driving voltage to compensate the current caused by the change of temperature.

运用两点校正法分段拟合MOSFET门极驱动电压与LD电流对应关系曲线，单片机依据曲线修正驱动电压值，对温度引起的LD电流变化进行补偿。

Consequently, the Alfvén wave current drive could be an excellent candidate of current drive for high confinement advanced tokamaks.

在未来托卡马克反应堆上采用动力阿尔芬波驱动电流很可能是高优电流驱动方案之一。

To repeat for emphasis, the line currents are the same as the phase currents for a Y connection.

要重复强调，线电流是作为一个Y连接相电流相同。

Canal nerve stimulator has characteristics of isolated output current, constant current and short circuit protection of output.

双输出电疗仪具有输出电流隔离，恒电流和输出短路保护特性，由12个标准程式和12 个用户程式组成。

Controls direction by supplying an input current into one of the two proportional solenoids and controls flow by changing the input current.

控制方向，提供输入电流成比例的两个螺线管并控制通过改变输入电流的流动。

The following functions can be realized: Measuerment:the effective values of three phase current and voltage, power frequency, active power, reactive power, power factor etc. Motor control: direct starting, converse starting, star and triangle starting, self-starting. Protection:thermal overload protection, current leakage protection, open-phase protection, three-phase unbalance protection, over voltage protection, loss voltage protection, low load protection and fault warning and fault dates memory. Communication: communication of the computer in control room and the microcomputer monitor in the spots is realized by the interface of RS-485. The motor is not only controlled in the spots but also in control room. The dates, information and some functions are shared by the spots and control room too.

该电动机监控器以80C196KC单片机为核心，通过采样三相电流﹑电压信号来实现以下功能：三相电流﹑电压有效值，电网频率，有功功率，无功功率及功率因数等的测量；对电动机实现直接、正反转、星三角及自起动控制；对电动机实现热过载、漏电、断相、三相不平衡、过压、欠压及轻载保护，对故障进行报警及数据记忆；通过RS-485串行接口与中央控制室计算机实现通信功能，对电动机既可本地，也可远程控制；实现控制现场与控制室之间数据、信息、功能共享。

An "Overcurrent Relay" is a type of protective relay which operates when the load current exceeds a preset value.

过电流继电器是继电保护装置的一种，当负载电流超过整定值时，继电器动作。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。