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。
On the basis of analyzing vibratory frequency control system of vibratory roller, the controller are designed and the plan of vibratory frequency constant control by PID are put forward.
在分析振动压路机振动频率控制系统的基础上，对控制器进行了设计，提出了采用PID控制实现振动频率恒定的方案。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
The decoupled control of active power and reactive power is a key technology of variable speed constant frequency (VSCF) wind energy generation system.
双馈发电机的有功和无功功率的解耦控制是变速恒频（VSCF）风力发电系统的关键技术。
The constant frequency hysteresis is adopted to keep switching frequency stable and improve the hysteretic control.
为了克服滞环控制的不足，串联侧采用恒频滞环来保持开关频率的稳定。
Preliminary experiments show that the smart ultrasonic generator based on the new method can quickly and accurately frequency track, and can work well with constant amplitude control.
实验结果表明，研制的智能超声波发生器频率跟踪迅速准确，并能实现振动系统的恒定振幅控制，可以实现振动系统的自动运行。
The frequency of DFB LD was driven and controlled through such technology as constant current, temperature control in active area, wavelength lock and etc.
该方案通过采用恒流源、有源区温度控制以及波长锁定等技术方法来实现DFBLD的稳频驱动及控制。
The results show that this control scheme could realize the high efficiency soft-switch control under the constant switching frequency to the converter.
结果表明，该控制方案能在恒定开关频率下对变换器实现高效率的软开关控制。
The adopted control mode of previous common frequency converter is usually of open loop constant voltage ratio, which its control curve is not stable.
早期通用变频器大多为开环恒压比的控制方式，控制曲线不稳定。
This article is about the research of space control in the variable speed constant frequency wind energy conversion system.
本文主要研究了变速恒频双馈风力发电系统中的矢量控制。
The control signals of invertor are produced by space vector modulation to achieve a small torque ripple and constant switch frequency.
以空间矢量调制方法来获得逆变器的开关信号，实现了小的转矩脉动和恒定的开关频率。
This paper introduces the control method for the Wind Turbine Units of constant speed constant frequency and variable speed constant frequency.
文章介绍了恒速恒频及变速恒频并网型风力发电机组的控制方法。
The paper mainly put forward a new control method of stepping motor which character-, ized by equal-stepped fine division, and then design a constant frequency PWM driver circuit.
提出一种等步距角的细分控制方法，并据此设计了恒频脉宽调制细分电路。
To get constant voltage and constant frequency energy that users need, the software and hardware of the inverter control system is designed.
由于永磁直驱风力发电系统所发出的电能为电压和频率的交流电，为得到恒压恒频的电能，本文进行了逆变控制系统的软硬件设计。
Automatic constant pressure control of system has completed by press-sensor, PLC, frequency converter etc.
系统通过压力传感器、PLC、变频器等设备完成供水系统自动恒压控制。
Practice has proved that the frequency conversion and constant pressure fuzzy control system has advanced technique and notable benefit? It has good application value and more research value.
实践证明：变频恒压模糊控制系统具有优越的技术性能和极其显著的经济效益，有很好的推广应用价值和进一步的研究价值。
Detailed method of the constant pressure control by frequency converter is described.
介绍了采用变频调速实现恒压控制的详细方法。
A novel AC variable frequency converting control system with multiple functions is introduced. The system is suitable for maintaining constant oil pressure in main line of oil pipelines.
阐述了一种新型多功能交流变频调速控制系统，用于保持油田输油管主干线油压恒定。
Through application of frequency converter in constant pressure water supply system, the paper describes the economic feature and advantages of adopting AC frequency conversion speed control method.
通过变频器在恒压供水系统中的应用，阐述了采用交流变频调速控制方案的经济性和优越性。
The applied plan is introduced of frequency control system by the microcomputer for constant -pressure water supply to circulating pump stations, and the system is analysed.
介绍了微机控制变频恒压供水系统在循环泵站中的应用方案，并对系统进行了分析。
This paper introduces a high-frequency series resonant charing method of solid pulsed laser power source, basing on constant current charging of digital control technology.
介绍了一种高频串联谐振充电的固体脉冲激光电源及其数字化控制恒流充电技术。
Finally, it is applied for the design of varied-frequency control system under constant-pressure.
最后，应用于高精度变频恒压控制系统设计中。
The paper presents the system design method and control process of applying frequency converter to realize water provision in constant pressure for high building.
本文介绍了用变频器实现高层建筑恒压供水的系统设计方法和控制过程。
The system mainly takes an indirect method to control the constant tension which consists of a modern transmission frequency transformer and an industrial control computer.
系统采用间接法进行恒张力控制，利用现代传动设备变频器和工业控制计算机组成电气恒张力控制系统。
The variable speed constant frequency double-fed wind power system is taken as the research object and the control problem of maximum wind energy tracing below the rated wind speed is studied.
以变速恒频双馈风力发电系统为研究对象，研究了额定风速以下风能的最大追踪控制问题。
To the most potential variable-speed constant-frequency doubly fed induction generator, the device of power electronics converter used to control rotate speed is analyzed.
针对最具有发展潜力的变速恒频双馈风力发电系统，分析其用于转速控制的电力电子变换器装置。
The constant pressure control system of finished water based on frequency adjusting is widely used in water works.
现阶段，基于变频调速的出厂水恒压控制系统，以其结构简单、容易实现等优点被国内水厂广泛采用。
A design procedure with constant parameter frequency method is developed for the temperature control system with variable parameter applicable especially to thermodynamics.
提出了热工专业中特殊的变参数控制系统的定参数频率设计法，应用计算机进行了仿真计算并进行了实际系统的测试。
In this paper a novel hysteresis current control method based on quasi optimized space voltage vectors for Active Power Filters (APF) with constant switching frequency is proposed.
提出了一种基于优化电压矢量的有源滤波器定频滞环电流控制新方法。
In this paper a novel hysteresis current control method based on quasi optimized space voltage vectors for Active Power Filters (APF) with constant switching frequency is proposed.
提出了一种基于优化电压矢量的有源滤波器定频滞环电流控制新方法。
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