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1·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。

2·Suppose the speakers both emit a pure sinusoidal sound wave of constant frequency.

假定两个扬声器都发射恒定频率的纯正弦声波。

3·Variable speed constant frequency generating system has been used in modern aircraft.

变速恒频电源系统已在现代飞机上使用。

4·The localizer is composed of two parts:a constant current constant frequency signal source and a signal detector.

装置由恒流信号电源和信号检测装置两部分组成。

5·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。

6·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。

7·Twin stator brushless doubly fed generation system is quite prospective for variable speed and constant frequency solutions.

而双定子无刷双馈风力发电系统是当前变速恒频风力发电技术研究中一个很有发展前景的课题。

8·We design a suit of aviation AC excitation generator system, it insures the output voltage is constant frequency and constant voltage.

我们设计了一套航空用交流励磁发电机系统，以保证输出电压恒频恒压。

9·The high power shaft alternator constant frequency systems developed by Siemens is introduced, which is suitable for large container ships.

介绍了西门子开发的大功率轴带交流发电机恒频供电装置，适用于大型集装箱船；

10·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。