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VFO? Variable Frequency Oscillator? 可变频率振荡器，变频振荡器?
Wave speed equals frequency times wavelength. 波速等于频率乘以波长。
This paper mainly introduces the starting method,and the starting torque,starting current and starting time (i.e.acceleration time) of the variable frequency adjustable speed induction motors. 主要介绍变频调速异步电动机的起动方式及涉及的起动转矩、起动电流和起动时间(或称加速时间 )。
By means of variable frequency and adjustable speed, the variable air volume air conditioning automatic control system saves energy through setting different static pressure values in different time periods. 变风量空调控制系统以变频调速为手段，分时段设定静压值以实现节能。
EAL-68 with small amount of additive is suitable for R407C in variable frequency rotary compressors of YZB-20R. EAL-68型POE润滑油加入少量添加剂可以作为R407C的YZB-20R型变频压缩机用油。
The frequency inverters has a function of variable voltage and variable frequency. 频率逆变器具有变压、变频功能。
Energy consumption of variable frequency drive pump are analyzed,and makes sugg estions about its suitable application. 详细分析了变频调速水泵的能耗，对如何合理应用变频调速水泵进行了探讨。
An idea of design is provided for asynchronous m otor of variable frequency variable speed in this paper mainly. 本文主要为变频调速异步电动机的设计提供一条思路。
Time clock signal source directly fetches from clock signal of PCI bus in the computer system or signal generator, which can generates high frequency time clock signal. 该时钟信号源直接取自于该电脑系统中PCI总线的时钟信号或是一可产生高频时钟信号的时钟信号产生器，用以供应该计数电路所需的输入时钟信号。
Motor for deflector roll in entry side is requested to use AC variable frequency control. 卷取机卸卷小车行走电机采用交流变频调速控制。
The generating of pseudo random sequence is one of the key subjects to realize the spread spectrum technique upgrade for BPC low frequency time code radio station. 伪随机序列的产生是实现BPC低频时码发播台扩展频谱技术升级的一个重要环节。
Then the parameterand implement frame of variable frequency test system are dis cussed. 对变频试验系统的参数和实际组件进行了讨论。
A new improved discrete variable voltage variable frequency equivalent sinusoidal control method is presented. 一种新的离散变压变频等效正弦控制方法被提出。
In this paper, a randomization sampling system with AC variable frequency technology, based on IP was introduced. 介绍一种以工控机为核心,利用交流变频调速技术实现的随机取样系统。
To achieve the basic waveforms (sine, square, etc.) display, a variable frequency and amplitude control. 能够实现基本波形（正弦，方波等）的显示功能，有频率和幅度变量的控制。
In this paper the ultrafine of attapulgite from Xuyi was studied by variable frequency planet-type grinding mill. 以盱眙产优质凹凸棒石粘土为研究对象,用变频式行星球磨机对其进行超细粉碎。
The VRV air-conditioning system of variable frequency technology can achieve the effect of energy conservation. 然而，封包的排程方法与睡眠模式的运作方式对于行动站台的能源消耗会产生很大的影响。
The frequency inverters has a function of variable voltage and variable frequency . 频率逆变器具有变压、变频功能。
A twist wire connected with multicircuit or variable frequency circuit board is winded on the industrial pipeline. 远处有多匝与变频电路板连接的螺旋状电线缠绕在工业管道上。
Coil car motor for Uncoiler equipment is requested to use AC variable frequency control. 开卷机上卷小车行走电机采用交流变频调速控制。