您要查找的是不是：
- AC frequency variated rig 交流变频钻机
- Extruder and hual off adopt AC frequency conversion technology. 挤出机、牵引机等采用交流变频控制技术，调整方便。
- AC frequency conversion electricity rig 交流变频电动钻机
- Impact in power frequency variation. 频率变化之影响。
- Drive and control part: adopting AC frequency conversion speed, drive step by step, digital closed loop control system. 五、传动及控制部：采用交流变频调速，分步传动，全数字闭环控制系统。
- ALC can be connected; revolution,speed and pressure can be adjusted by touchable screen and PLC program as required .Can be driven by AC frequency conversion electric machine. 根据用户要求，可与ALC（频率监控仪）的连接，可以采用触摸屏与PLC程序控制，可以采用交流变频电机驱动。
- If the load to change the speed of change, with the AC frequency speed not enough to pace disorders, tend to stop or cause damage. 倘若负载改变而使转速改变时，转速即与交流电频率不合，足使其步调紊乱，趋于停止或引起损坏。
- The magnetic critical current by magnetic hystersis loop is dependent on field sweeping rate dH/dt and j(subscript c) determined by ac susceptibilty depends on the ac frequency. 交流磁化率法测量的临界电流与交流频率有关，使用高频测量时临界电流的判据较大。
- The scres extruder and the extractor adopt the imported AC frequency control devicc The vacuum pump and the electric vehicle motor employ the superior goods. 螺杆挤出机及牵引机采用进口交流变频调速装置，真空泵及牵引电机均采用优质产品。
- Control Circuit Design of AC Frequency Conversion Systems for Speed Governing[A]Proceedings of 4th International Symposium on Test and Measurement(Volume 2)[C], 2001 . 陈萌;叶桦;达飞鹏.;自动售货机主控制器及执行机构的设计与实现[A]第七届全国信息隐藏暨多媒体信息安全学术大会论文集[C];2007
- Discus sed a tension automatic control system with AC frequency control system and tension sensors, although the normal PID controller is easy to act, its adaptability is bad. 摘要讨论采用交流变频器作为执行机构，压力传感器作为张力检测元件构成的张力控制系统；
- ALC can be connected; revolution, speed and pressure can be adjusted by touchable screen and PLC program as required. Can be driven by AC frequency conversion electric machine. 根据用户要求，可与ALC（率监控仪）连接，可以采用触摸屏与PLC程序控制，可以采用交流变频电机驱动。
- 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。
- 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。
- Feasibility of using AC frequency variable drive system on heavy load drilling rig 大型钻机采用交流变频驱动的可行性研究
- The correlation between frequency variations of enzyme bands and tree height, DBH and volume was very small. Only B45 band came up to or closed significant level. 酶带频率变异与树高、胸径、材积生长相关性很小,只有B_(45)酶带与生长相关达到或近于显著水平。
- 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。
- AC frequency conversion speed regulator 交流变频调速器
- AC - DC - AC frequency conversion 交-直-交变频
