您要查找的是不是：
- Energy saving improvement on motor fan by the application of varying frequency device 变频器在风机节能改造中的应用
- Expectation to the application of heavy-duty varying frequency device in non-ferrous metallurgy industry 大功率变频调速节电在有色冶金行业的应用展望
- varying frequency device 变频器
- VFD (varying frequency device) 变频器
- VFD (varying frequency devices) 变频调速
- The excursion of instantaneous frequency representation will be resulted when EFT is applied to signals with rapidly varying frequency contents. 对于具有恒定幅度的调频信号而言，瞬时频率代表了其全部的信息，可以据此对信号进行识别和分类。
- Supporting hand-held devices, such as PDAs and radio frequency devices. 支持手持设备，例如pda和射频设备。
- This paper describes the application of Variable Frequency Device in FCS. The hardware configurations and con-trol strategy configurations of FC$ and the principle of VFD are introduced. 论文叙述了变频调速技术在现场总线控制系统中的应用。介绍了该FCS的硬件配置、控制策略组态方案和采用变频调速技术的节能原理。
- In terms of pitch, bats produce echolocation calls with both constant frequencies and varying frequencies that are frequently modulated. 关于音调，蝙蝠用恒定频率和频繁调整的变化频率发出回声定位的叫声。
- Abstract: This paper describes the application of Variable Frequency Device in FCS. The hardware configurations and con-trol strategy configurations of FC$ and the principle of VFD are introduced. 文摘:论文叙述了变频调速技术在现场总线控制系统中的应用。介绍了该FCS的硬件配置、控制策略组态方案和采用变频调速技术的节能原理。
- Jiang Xia,Jiang Qirong,Yan Gangui,et al.Self-excitation of induction motor shunted with LC filter of high voltage variable voltage variable frequency device[J].AEPS,2003,27(4):45-49(in Chinese). [5]蒋霞;姜齐荣;严干贵;等.;高压变频调速中LC滤波电容与异步电机之间的自激[J]
- The machine uses core wire tension control device and advanced computer frequency devices that can be adjusted within the provisions of speed spindles. 有芯线张力控制机构，有电脑变频装置。
- varying frequency speed controller 变频器
- varying frequency speed controner 变频器
- varying frequency speed regulating 变频调速
- The develop ment of novel single frequency devices shows a bright future for near infrared laser diodebased gas sensing. 新型单频器件发展表明近红外激光二极管气体传感具有广阔前景。
- More and more variable frequency devices (VFD) are being installed on the chilled water and hot water pumps on the TAMU campus. 建筑水环境攸关于建筑物内用水的来与去，其中给水系统的使用以舒适性（足量、足压、适温）及良好的水质为最重要的考量因素。
- This includes brain rhythms, heartbeat, muscle tension, mental and emotional rhythms, hormonal and enzymatic rhythms, sleep and wakefulness, all with varying frequencies and intensities. 这些规律包括脑波的规律，心跳，神经和感情的规律，统一以及酶化的规律，睡眠以及清醒，所有的状态和紧张。
- high-volt AC VFD (variating frequency device) 高压交流变频调速器
- This paper introduces the system of single phase large power source varied frequency for heating,contains rectifier,filter,inverter and control circuit etc. 介绍了大功率单相变频加热电源的系统组成，包括整流、滤波、逆变和控制电路等部分。
