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Frequency variation control 变频控制
Impact in power frequency variation. 频率变化之影响。
Frequency variation process and unit's swing process after fault can be closely simulated. 故障后的频率变化和机组摆动过程可确切地仿真。
Speed control by frequency variation 变频调速
In order to overcome the influence of variation to the project goal, many people carried on to the variation control thoroughly, proposed many control measures. 为了克服工程变更对项目目标的影响，业内人士对工程变更控制进行了深入地研究，提出了许多控制措施。
Digital filtering technique based on least square method, multichannel sampling technique and frequency variation sampling technique were used experimentally. 实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。
In the second design, we use an adaptive biasing circuit to compensate for process and temperature deviation.Even in the worst case, the frequency variation is under 5%. 在第二个设计中，我们使用一个适应性偏压电路去补偿制程跟温度造成的频率漂移，即使在最差的条件下，频率漂移还是可以维持在5%25以内。
Keywords Speed control by frequency variation mine fanner energy-saving; 变频调速;矿用通风机;节能;
relative frequency variation rate 相对频率变差率
scheme of stator frequency variation 定子变频方案
Speed Regulation by Frequency Variation 变频调速
On Variation Control Techniques for Automotive Body Assembly 轿车车体装配尺寸偏差控制技术
Power conditioning is used to minimize voltage and frequency variations in an external power. 电源调节用来最小化外部电源的电压变化和频率变化。
Application Effects of Speed Control Technique By Frequency Variation on Feeding Coal Installation of Boiler 变频调速技术在锅炉给煤装置上的应用效果
Design and application of frequency variation speed control system for mooring winch 系泊绞车变频调速系统的设计与应用
The frequency variation at the change of input speed 输入转速变化时的频率变化
An application of speed control by frequency variation to constant pressure water supply for ship 变频调速在船舶恒压供水中的应用
technology of speed regulation by frequency variation 变频调速技术
Energy Saving Reconstruction of Sand Pump Station with Speed Control Technology by Frequency Variation 利用变频调速技术对选矿砂泵站进行节能改造
Design of Speed-Adjustment Control System of Frequency Variation of Rope-Drawn Rail Vehicles 基于矢量控制的卡轨车变频调速控制系统的设计

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