1) frequency change signalling
变频传信
2) frequency exchange signalling
频率变换信号方式，变频传信
3) variable frequency drive
变频传动
1.
Remote ship condition monitoring and fault diagnosis system for variable frequency drive;
船舶变频传动系统远程状态监测和故障诊断系统
2.
An analysis of the reason and the impact of load distribution in the variable frequency drive for the paper machine is presented in this paper.
本文分析了纸机变频传动的负荷分配问题产生的原因及造成的影响 ,还介绍了解决负荷分配问题的方法 。
3.
In view of the problems with original variable frequency drive control system of 2400 paper coating,this paper mainly introduces the optimizes design of the main hardware structure and soft programming of the control system based on PLC.
针对2400涂布造纸机原变频传动系统的诸多缺陷,采用PLC对该系统进行优化,阐述了变频传动系统的改造方案,给出了其硬件结构和主要软件的设计思路。
4) inverter signals
变频信号
1.
This paper states the method and principle about measuring vehicle-used electronic siren s inverter signals by single chip microcomputer.
本文阐述了单片机测量车用电子警报器变频信号的原理和方
5) frequency-change signaling
变频通信
6) signaling,out-of-band
频带外传信
补充资料：传信鸟
1.鸟名。
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