改变励磁电流的大小和方向可以控制直流磁通的大小和方向。
The magnitude and direction of this magnetic flux can be controlled in agreement with the magnitude and direction of the field current.
仿真结果表明在稳态时功率因数接近于1（0.99），验证了给出的励磁电流的控制方法、四象限开关表的正确性。
The simulation results show that the power factor approaches to 1 (0.99) at stable state, and the exciting current control method and switches table in four quadrants are correct.
提出一种采用逆变器并联电容器的新方法，该方法通过PWM逆变器控制悬浮力绕组中励磁电流。
A novel method of a capacitor in parallel with inverter is presented, in which current in levitation force winding can be controlled by PWM technique.
为了提高电涡流测功器加载的动、静态性能，采用自适应控制来改变电涡流测功器的励磁电流，从而可以精确模拟实际工况加载。
In order to improve its dynamic and static performance of loading, adaptive control is used to change its exciting current for achieving accurate simulation of the actual working load.
利用磁粉制动器的励磁电流与制动力矩成线性关系这一特性，设计了闭环张力控制系统。
Utilizing the linearity peculiarity of the exciting current of magnetic powder brake and brake moment, the closed loop control system is designed.
提出了一种异步电机无速度传感器矢量控制的新方法，用瞬时无功功率和励磁电流变化来估计电机转速。
This paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.
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.
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.
异步电机矢量控制由于实现了励磁电流和转矩电流的解耦控制而具有优良的动态性能。
By decoupling between the magnetizing current and the torque current, the vector control strategy of induction machines can achieve excellent dynamic performances.
通过TL494自动调节PWM输出控制励磁电流，达到稳定发电机输出电压、输出电流和限流充电的目的。
The output of PWM(pulse width modulation)was automatically adjusted by TL494 to control the field current of the generator, which accomplished stabilizing output v.
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.
本文提出励磁电流可自动控制的他励式双高调速系统设计方案。
A design scheme of a separate-excited speed control system with double high performances is presented in the paper.
而对励磁电流的检测则是能够更好的实现励磁电流的实时控制，提高机端电压的稳定。
Then, it can be better to control excitation current real-timely and raise the stability of generator voltage that excitation current is measured.
上述原理表明，通过改变直流励磁电流，可以连续地控制HSY的气隙磁通和绕组感应电压。
The above principle suggests that the gap flux and the voltage induced in armature winding of HSY can be controlled adequately and continuously by varying dc field current.
S加减速曲线算法及励磁电流自适应控制器。
The algorithm of the S acceleration & deceleration curve and the excitation current adaptive controller.
本文论述了直流互感器在大功率晶闸管励磁系统中线路结构形式以及在激磁电流自动调节控制系统中所起的作用。
The paper presents the circuit structure type of the D. C. inductor in high power thyristor exciting system and the role of the D. C. inductor in the exciting current self-regulation control system.
常用的励磁控制方法主要有三种：恒励磁电流、恒功率因数、恒给定开环控制。
There are three usual methods for excitation control following constant excitation current, constant power factor, and constant setting open-loop control.
控制方式具有恒机端电压励磁调节、恒励磁电流调节、恒功率因数励磁三种。
The control way of system has 3-patterns: exciting regulator of constant terminal voltage, constant exciting current regulator and exciting regulator of constant power factor.
控制方式具有恒机端电压励磁调节、恒励磁电流调节、恒功率因数励磁三种。
The control way of system has 3-patterns: exciting regulator of constant terminal voltage, constant exciting current regulator and exciting regulator of constant power factor.
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