The two rails are not only signal lines of track circuits, but also loop current line of locomotive traction current in electrified railway block.
电力牵引区段的两条钢轨，既作为轨道电路的通道来传输信号电流，又作为牵引电流的回路来传送牵引电流。
Each module is controlled by voltage current two closed loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
三台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
We have mainly researched two FM signal demodulation techniques called Frequency Spectrum Separation and Phase Lock Loop in the first part.
一次解调中研究了频谱分离法和锁相法两种实现鉴频的技术。
Data acquisition card collects data about the power output to realize a close-loop control, and protection signal of the two controllers to compute the delay time.
数据采集卡采集程控电源的输出以实现对程控电源的闭环控制，采集发电机控制器和汇流条功率控制器的保护信号以计算延时时间。
Each module is controlled by voltage-current two closed-loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
每台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
Each module is controlled by voltage-current two closed-loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
每台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
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