In a drive system of power transistor inverter-motor, not only can it be used in fine control of motor current waveform, phase, amplitude and frequency, but can also be used to sense, fault current.
在大功率晶体管逆变器——电动机驱动系统中，它不但可用来对电动机电流的波形、相位、幅值和频率进行精细控制，而且能快速地检测出故障电流。
On line predicting obtaining power system post disturbances steady frequency is beneficial for frequency stability assessment and emergency control.
在线预测系统扰动后的稳态频率，有利于扰动后系统频率稳定性评估和紧急控制。
This paper mainly discusses the control and protection system for the 20kw VSCF (Variable Speed Constant Frequency) Wave Power Electric Station.
本文着重介绍了20千瓦变速恒频波力发电系统的控制功能和保护体系。
A long field running of the medium-frequency power supply shows that the control system presented in this paper greatly improves its stability and quality.
长期的现场运行表明，这一控制系统大大提高了电源的可靠性及中频电源产品质量。
When applied to active power filter, this novel control scheme not only reduces the switching frequency and the switching loss, but also has better performance and robustness.
该控制策略在有源电力滤波器的应用，不仅大大减小了开关频率、降低了开关损耗，而且具有很强的鲁棒性和更好的控制精度。
In intelligent peripheral subsystem, Radio Frequency Front Modules include linear power amplifier, low noise amplifier and detection control circuit.
智能天线子系统中，射频前端模块包括线性功率放大器，低噪放大器，检测控制电路。
In this thesis, a slid frequency vector control system and a speed sensorless vector control system based on reactive power are investigated and analyzed.
本文研究分析了转差频率型矢量控制和基于无功功率的无速度传感器矢量控制。
To maintain both the voltage and the frequency within limits requires fine power control and load regulation.
既要保持电压而在限制范围内的频率，需要良好的功率控制和负载调节。
Automatic generation control (AGC) is one of the important measures to regulate the frequency and active power of power grid and ensure its security and economic operation.
自动发电控制(agc)是调整电网频率与有功功率、保证电网安全、经济运行的重要措施之一。
Then the principles of hierarchical estimation and feed forward compensation are applied to derive the power system state estimation and load frequency control equations.
然后，应用分层估计和前馈补偿原理导出电力系统状态估计和负荷频率控制方程。
The UPFC power frequency model with its main and supplementary control block diagrams and the formulation for FDC parameter optimization are presented.
建立了UPFC的频域模型，给出了主控制和辅助控制的框图，推导了模糊阻尼控制器参数优化的公式。
Some factors affecting the frequency and magnitude of power supply, such as supply voltage, duty of control signal, the resistance and capacitance of oscillation circuit are discussed.
讨论了一些影响放电电压大小及频率的电源参数，如供电电压、控制信号占空比、振荡电路的电阻和电容等。
Consider of water ecosystem protection and characteristics of ultrasonic technology, low frequency and low power ultrasonic especially suit to control algal growth in water body.
超声波的空化作用能够抑制藻类生长，从保护水体生态系统以及超声波技术本身的特点考虑，低频率、低功率的超声波更适合于水体抑藻应用。
This paper is divided in six chapters, including the medium frequency power supply of thyristor's theory, design, regulation strategy, control system, experiments and conclusion.
本文的内容主要分为六章，分别阐述了晶闸管中频感应电源的工作原理、主电路设计、控制策略、控制系统实现、试验结果和结论。
In high power laser system, a small size phase-distortion wavefront measure is necessary to compensate and control the wavefront of laser beam with intermediate frequency.
在高功率激光系统，激光束小尺度相位畸变波前探测是实现激光束中频段波前补偿与控制的重要前提。
Link quality analysis (LQA) is a key measurement process in adaptive frequency hopping (AFH) communication systems and results in adaptive frequency and power control.
信道质量评估是自适应跳频通信的关键技术，其实时评估结果为自适应频率控制和自适应功率控制提供依据。
Some parameters affecting the frequency and magnitude of power supply, such as supply voltage, duty of control sigal. the R and C of oscillation circuit are discussed.
对影响放电电压大小及频率的电源参数进行了讨论，如供电电压、控制信号占空比、振荡电路的R和C等。
Auto power control, frequency auto-adjustment and load balance make it more flexible and stable to establish large scale network.
自动电源控制，频率自动调整负载平衡，使其更为灵活和稳定，建立大规模的网络。
First, a suitable mathematical model for the frequency and tie line power of decentralized control is given.
首先给出一种适于对频率和交换功率进行分散控制的数学模型。
The basic operation principle of the series active power filter for harmonic suppression of frequency converter is analyzed in this paper, and its control method and control circuit are studied.
文章分析了适用于变频器谐波抑制的串联型有源电力滤波器的基本工作原理，并对其控制方法和控制电路进行了研究。
The simulator can be used in feasibility study for designing load frequency control system and simulating power system operation.
程序主要用于电网自动调频系统设计的可行性研究以及对电网运行的动态模拟。
In total number high frequency high-power UPS, there are two or more pieces DSP and SCM accomplishing the control and supervision missions which are complicate.
在全数字化高频大功率UPS中，大都采用两片或多片dsp与单片机共同完成较为复杂的控制和监控任务。
The design of a novel high frequency fluorescent lamp IC, on which low voltage control circuit and high voltage power device encapsulated in one chip, is introduced.
本文介绍了一种高频荧光灯镇流器芯片的设计，在芯片的实现上充分体现了低压控制电路与高压功率器件在单一芯片上的兼容性。
This paper proposes mathematical models of load-frequency suboptimal and optimal control in multiarea electric power systems.
本文提出了多地区互联系统负菏—频率次优及最优控制的数学模型。
An application case in a fired power plant shows that with frequency conversion timing and automatic control techniques, the significant energy saving has been realized.
火电厂中央空调的应用实例证明了通过变频调速和自动控制技术，提高设备的节能水平是显而易见的。
The improved control method can make the two power switches turn on and off all under soft switching conditions and further increase the switch operating frequency and power density.
通过改进控制方式，可以使这两个功率开关的导通和关断都工作在软开关条件下，从而可以进一步提高开关频率，达到增加功率密度的目的。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
Using Portable power frequency electric quantity test instrument as controlled equipments can measure and control equipments on-line by the pocket PC.
采用便携式工频电量测试仪作为受控设备，利用掌上电脑对受控设备进行在线测量和控制。
This paper introduces the system of single phase large power source varied frequency for heating, contains rectifier, filter, inverter and control circuit etc.
介绍了大功率单相变频加热电源的系统组成，包括整流、滤波、逆变和控制电路等部分。
This paper introduces the system of single phase large power source varied frequency for heating, contains rectifier, filter, inverter and control circuit etc.
介绍了大功率单相变频加热电源的系统组成，包括整流、滤波、逆变和控制电路等部分。
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