励磁电流

而采用IGBT构成系统的主回路，功率器件控制容易，工作可靠，可以实现励磁电流的可逆运行。

In addition , by using IGBT in main loop of the system , control and operation of power elements is easy and reliable , and reversible flow of field current can be realized .

试验结果表明该调节器可以很好的调节励磁电流，并能可靠地实现励磁电流的反向。

Test results show that the regulator operates well in the regulation of field current and the reversal of field current are realized reliably .

基于H桥拓扑结构的励磁电流放大器

Exciter Field Current Amplifier Based on H Bridge Topology Circuit

基于DSP的无刷同步电机励磁电流测量及旋转整流器故障检测研究

The Study of Exciting Current Measurement and Rotating Rectifier Faults Monitoring of Brushless Excite Synchronous Generator Based on DSP

讨论了Scott接线变压器的励磁电流特性；

The properties of magnetizing currents of Scott transformers are discussed .

采用PLC控制变频器来改变电力测功机励磁电流的大小，来达到改变模拟加载阻力的要求。

PLC was used to control the transducer , change current of the dynamometer , so that it can change simulated load resistance .

但是使用高阻继电器时，CT的励磁电流降低了保护的灵敏度，所以低阻继电器又重新被启用，但必须从外部引入闭锁信号或启动信号或延时，以便避越外部故障的不平衡电流。

Now the low resistance relay is used for sensitivity in the resistance earth transformer . It is necessary to use blocking signals to overcome the imbalance current .

磁链和转矩的控制量由定子电流d、q轴分量变为励磁电流d、q轴分量。

Rotor flux and torque control variable changes from the stator current d , q-axis components to magnetizing current d , q-axis component .

最后，利用三维电磁场仿真软件建立了变压器3D模型，分析了其磁场分布、励磁电流等随时间变化情况。

Finally.3-D model of the transformer is built by electromagnetic field finite element software to analyze the magnetic field distribution , excitation current and other variables in the transformer .

通过ANSYS软件首先对磁路进行分析，得到不同励磁电流下阻尼间隙中的磁通密度分布图，经过统计分析获得阻尼间隙中的磁感应强度值随励磁电流的变化曲线趋势图。

Firstly through the ANSYS software to analysis the magnetic circuit and obtained the curve of the flux density in the gap with the current .

该法通过测量PT二次回路励磁电流在分流器上的压降与所施加电压的比，模拟一次绕组内阻抗压降产生的误差。

A development was made in terms of measuring the voltage drop by ratio error at a shunt in magnetized secondary circuit of a VT.

DSP主要完成采样、PI调节和通信等，实现偏磁式消弧线圈励磁电流的数字控制。

The DSP realizes functions of sampling , PI regulation , communication and so on to digitally control the excitation current of arc-suppression coil with magnetic bias .

通过建立PI输出和控制角的线性化函数，简化控制程序，使励磁电流快速跟踪给定电流。

Linear functions of the PI regulator output and the trigger angle simplify the control program and make the excitation current follow the set current quickly .

采用西门子公司的S7-200PLC+TP170B触摸屏的控制结构，对主要控制参数&励磁电流采用PID控制算法，实现对磁选机系统的最优控制。

It adopts Siemens S7-200 PLC + TP170B touch-screen in its control frame and PID arithmetic to control the main parameter-excitation current , thus realizing the optimal control of the magnetic separator system .

根据相似原理，用相似电感提取CT的励磁电流，经过一些电子线路，产生适当的补偿电流，注入补偿绕组。

According to the principle of similarity , the excitation current of CT is drawn with the similar transducer , which , through some electronic circuits , turns into proper compensation current and is injected into the compensation winding .

电流互感器（CT）采用电磁感应的原理得到与一次侧电流成比例的二次电流，当磁通饱和时励磁电流增大，两侧电流的比例关系发生改变。

Using current transformer ( CT ), people gain secondary side current which is proportional to primary side current . When magnetic flux is saturated , the excitation current is increased and the proportion of the CT is changed .

直流偏磁条件下电力变压器铁心B-H曲线及非对称励磁电流

B-H Curve Based on Core and Asymmetric Magnetizing Current in DC-Biased Transformers

对于采用PI控制的定子磁链外环，如果磁链指令值与实际稳态工作点不一致，将导致励磁电流进入限幅状态。

The flux current will be forced to be the limited state if the stator flux loop controller is PI controller and the reference vale of flux does not match the real flux value .

通过实验研究，确定了电磁超声传感器最佳励磁电流，利用ANSYS有限元软件，对用于钢管缺陷检测的电磁超声传感器的磁感应强度进行了计算，得到磁感应强度的分布规律。

The best impelled current of the electromagnetic iron was determined by experiments , and magnetic induction intensity in electromagnetic acoustic transducer ( EMAT ) testing steel pipe 's defaults was calculated by ANSYS finite element software .

针对串联变压器励磁电流对负载电压精确度的影响，提出励磁电流补偿（MCC）的方法。

The method of the Magnetizing Current Compensation ( MCC ) is put forward in accordance with the effect of the exciting current of the series transformer .

开关电源并联系统常用的自动均流控制方法在自动电压调节器AVR（AutomaticVoltageRegulator）开环模式下会大幅改变励磁电流静态值，故只能安全用于AVR闭环模式下。

In AVR ( Automatic Voltage Regulator ) open-loop mode , the common automatic current sharing control of parallel switching power supply system may change the static excitation current greatly . It can only be used safely in AVR close-loop mode .

通过dSPACE原型控制器，调节电控柴油发动机的转速和无刷交流同步发电机的励磁电流，实现了辅助功率单元的三种输出控制方法。

All these are done on the dSPACE prototype controller . Both the diesel engine speed and the excitation current of the brushless AC synchronous generator are regulated .

着重介绍怎样利用ANSYS这一有限元分析软件进行汽轮发电机的励磁电流计算，以及如何进行汽轮发电机同步电抗参数的计算。

This paper emphatically introduces how to calculate the excitation current and synchronous reactance parameters of turbo-generator by finite element software ANSYS and then compares the calculation values ( of the excitation current and synchronous reactance parameters ) with the test ones .

系统以采集到的转速和转矩值作为参考变量，利用PID算法，通过调节发动机的油门和测功机的励磁电流，使发动机达到预先设置的工况。

In the system , rotation speed and torque tested by sensor are considered as a reference variables , which are used in PID algorithm to make ICE come to work at a set state by adjusting the throttle of ICE and excitation current of dynamometer .

同步电机稳定极限对应于与V型曲线上稳定极限区相对应的励磁电流If和电枢电流IM，稳定极限的计算传统上有两种方法：电势向量图法和实测法。

Stability limit of synchronous electric machine matches with the exciting current If and armature current IM in the stability limit area of V-curve , traditionally , there are two methods to solute the stability limit : drawing potential vector and field exploring .

同时给出了带死区的Bang-Bang-PI复合控制算法在励磁电流控制中的应用，并结合复合控制算珐，用MATLAB进行了仿真，取得了令人满意的结果。

Meanwhile supplying applications to dead zone Bang-Bang-PI Multi-control algorithm in permanent torque load armature current and exciting current control . It simulates the whole system with MATLAB . The design achieves expected results .

本文从力矩电流和励磁电流直流调节分析出发，将电流调节器的输出转化为逆变器的电压参考值，并通过空间电压矢量PWM方法实现电压输出和电流的跟踪控制。

From the analysis of DC adjustment of torque current and exciting current , the output value of current regulator was translated into the reference value of inverter voltage , and voltage output and the current tracing control were realized with voltage space vector PWM ( SVPWM ) method .

实验表明该系统励磁电流动态响应小于5ms，满足偏磁式消弧线圈的控制要求。

The experiment shows that the dynamic response of excitation current is less than 5 ms , meeting requirements of arc-suppression coil with magnetic bias .

控制器可通过人机接口、串口通讯和网络通讯三种方式进行参数设置和数据交换，采用参数自整定模糊PID的控制策略，通过MOSFET功率器件进行励磁电流的PWM调节。

The control parameter and status data exchanged between the supervisor computer and the DSP chip was used by HMI , serial communication interface and network interface . Parameter self-tuning fuzzy PID and PWM technology were adapted as control strategy . The excitation current was controlled by power MOSFET device .

双馈电机变速恒频（VSCF）风力发电系统，是通过调节转子绕组励磁电流的频率、幅值、相位和相序来实现变速恒频控制的。

The control of variable speed constant frequency ( VSCF ) for a wind power generation system is implemented by controlling the frequency , amplitude , phase angle and sequence of the rotor winding currents of the doubly fed machine .