1) dynamic frequencies scaling
动态可变频率
2) transient state frequency variation
动态频率变化率
3) variable frequency drive
可变频率驱动
4) variable frequence
可变频率
1.
It is controlled by MC68HC908QT2 as one kind of cheap MCU, and drived by variable frequence technology.
介绍了一种低电压供电且以MC68HC908QT2廉价单片机控制和可变频率驱动技术为核心的太阳能高压钠灯电子镇流器。
5) dynamic frequency
动态频率
1.
Effects of generator inertial time constant on the dynamic frequency of the power system;
发电机惯性时间常数对电网动态频率的影响
2.
The definition for dynamic frequency in power systems and the fictitious rotor method for dynamic frequency measurement;
电力系统动态频率的定义及“虚拟转子法”频率测量研究
3.
As for the numerical simulation by traditional power system component models and parameters, the obtained dynamic frequency curves evidently diverge from measured ones.
调整大区互联电网的参数使动态频率仿真轨迹与实测频率轨迹尽可能接近,并总结了进行参数调整的主要依据,可为根据量测轨迹进行参数识别提供参考。
补充资料:动态频率扫描
动态频率扫描
超声学检查技术之一。通过多频探头和可变带通滤波器的结合,不用更换探头,就能自动转换工作频率,在近场使用高频率,在远场使用低频率的技术。具有高分辨力和高灵敏度这两个互相排斥的特点,可把各个单频探头的图像质量最佳之处取出并组合一体。采用超低杂波、宽带放大器及超声波发射、接收效率均佳的多层探头,从而做到分辨力高,穿透性强,图像清晰,杂波少。
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参考词条