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变频技术 Frequency conversion technology英语短句 例句大全

时间:2022-11-15 15:12:20

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变频技术 Frequency conversion technology英语短句 例句大全

变频技术,Frequency conversion technology

1)Frequency conversion technology变频技术

1.Applications ofFrequency conversion technology on boiler fan;变频技术在锅炉风机上的应用

2.Application of frequency conversion technology in automatic water supply system of long distance railway lines;变频技术在远距离铁路供水自动控制系统中的应用

3.Application of frequency conversion technology in constant pressure water supply control system变频技术在水泵控制系统中的应用

英文短句/例句

1.Status Quo and Development of Frequency Conversion Technology and Explosion-proof Converter变频技术、防爆变频器的现状及发展

2.DDC Technology Based on Digital Orthogonal Mixing基于正交混频的数字下变频技术研究

3.Investigation of the Converter Technology for a Variable-Speed Constant-Frequency Wind Energy Generation System with Doubly-Fed Induction Generator;变速恒频双馈风力发电机变频技术的研究

4.The Application of Variable Frequency Technology in Modification PROTOS Cigarette Making Machine变频技术在PROTOS卷接机组技术改造中的应用

5.Research on Digital Down Conversion Using FPGA;基于FPGA的数字下变频技术的研究

6.Research on the Digital Down Conversion Technique Based on FPGAs;基于FPGA的数字下变频技术研究

7.On the Influence of the Frequency Converter Technique upon the Screen Image Quality of Digital Color TV;浅析变频技术对数码彩电画质的影响

8.PWM Modulation Technology of MV7000 InverterMV7000变频器PWM调制技术

9.Low Noise Frequency Conversion Technology and the Improvement on Rubidium Frequency Standard;低噪声频率变换技术及铷原子频标的改进

10.The Application of Frequency-Tracing Technology Based on PLL for HF-Inverter Power Supply;锁相环频率跟踪技术在高频逆变电源中的应用

11.The Power Tech of Vast Frequency Conversion and the Research and Production of High Frequency Electronic Ballast;广谱变频电源技术及高频电子镇流器的研制

12.Research of Frequency Converter Technology in Flexible Fractional Frequency Transmission System Based on TSMC基于TSMC的柔性分频输电系统变频换流技术研究

13.The high frequency excitation algorithm for digital audio signals based on wavelet transform基于小波变换技术的数字音频高频激励算法

14.Research of Inverters with High Frequency Link Based on the SPWPM and Soft Switching Technology;基于SPWPM和软开关技术的高频链逆变技术研究

15.Technology of Jamming Frequency Agility Radar and its ECM Efficiency Measurement干扰频率捷变雷达技术及其效果度量

16.The Study of the Treatment of Oil Field Water by Frequency Conversion Electromagnetic;变频电磁场处理油田水防垢技术研究

17.Research on the Intelligent Method and the Key Technology for Converter;变频器智能化方法及关键技术的研究

18.Design of Variable Frequency Power Supply Based on SOPC;基于SOPC技术的数字变频电源设计

相关短句/例句

converter technique变频技术

1.Theconverter technique and its application in main fan of coal mine;变频技术及其在矿井主扇中的应用

2.According to the actual situation of 12 coal mining area in Jinjia, assured the installing angle of the main fan" leaves and discussed the calculation of the motor" power,also elaborated the way of how to select the main fan and assemble the main fan controller usingconverter technique in great detail,in order to promote the apply of economical technique in coal mine enterprise.根据金佳12采区的实际情况,阐述了主风机的选型方法,确定主风机风叶安装角度,电动机功率计算方法,以及应用变频技术控制风机运行参数,从而提倡在煤矿中应用节约型技术。

3.Puts forward a hoister speed governing proposal based onconverter technique and fuzzy control theory.提出了一种基于变频技术和模糊自适应控制理论的调速方案,能够实现高精度平滑无级调速,提高乘坐的舒适度,并充分体现出变频技术的优越性能和广泛的应用前景。

3)variable frequency technology变频技术

1.Cold supply system of some subway stations and water supply system of some newly-built residential areas adoptvariable frequency technology.某些地铁车站的集中供冷及新建大型小区给水系统采用了变频技术,由于设计时考虑不周导致在使用过程中出现一些问题。

2.In accordance with the application ofvariable frequency technology in household air conditioner, this paper discusses what variable frequency speed regulation is,the principles and components of converter,it also summarizes and analyses the unique performance of thevariable frequency technology used in household air conditioner and the usually used methods and thoughts.本文从变频技术在家用空调的应用出发,阐述了什么是变频调速及变频器的原理和组成,并总结和分析了变频技术应用在家用空调所具有的独特性能以及常用的检修方法及思路。

4)frequency conversion technique变频技术

1.Application of programmable logic controller andfrequency conversion technique in transformer air-cooling system;可编程控制器及变频技术在变压器风冷却器系统中的应用

2.Based onfrequency conversion technique, the traveling gear of stacker & reclaimer, the harbor coal export device, is improved.利用变频技术对港口的煤炭堆取料机的行走驱动系统进行改造。

3.On the basis of analysis of system characteristics,frequency conversion technique is adopted to transform an aqueous ammonia pump of high pressure in coal charging process without dust of coke oven, and the closed loop control is used, which have gained better effects.通过系统特性分析 ,对焦炉无烟装煤工艺中高压氨水泵运用变频技术进行改造 ,并采用闭环调节 ,取得了较好的实际效果。

5)frequency conversion变频技术

1.Application of Frequency conversion in induced draft fan and energy saving analysis;变频技术在锅炉引风机上的应用及节能分析

2.In this paper,an efficient HV DC power system usingfrequency conversion,HV π RC filtering,PWN control,phase-control rectification and other electric and electronic technology,By using this system,the separation result is improved in Titanium concentrator,Panzhihua Iron-steel corporation.文章针对YD- 3Ⅱ型电选机高压电源系统输出的直流高压脉动系数大、稳定性差的现状 ,提出了一种采用变频技术、高压π型RC滤波、PWM控制、相控整流等一系列电力电子技术的新型高效高压直流电源系统。

3.Both of the energy-saving principle and performance of compressor withfrequency conversion fitting is examined in detail.阐述了制冷压缩机的能量调节方式,分析了压缩机变频技术的节能原理及变频压缩机的性能,用实例论证了变频技术在冷库制冷系统中的节能与经济效益。

6)PWM frequency-converting techniquesPWM变频技术

延伸阅读

变频器技术术语介绍阻抗:指含有电阻、电感和电容的电路里,对交流电所起的阻碍。电容三点式振荡器(也叫考兹振荡器):自激振荡器的一种。由串联电容与电感回路及正反馈放大器组成。因振荡回路两串联电容的三个端点与振荡管三个管脚分别相接而得名。 环路滤波器:具有以下两种作用的低通滤波器:在鉴相器的输出端衰减高频误差分量,以提高抗干扰性能;在环路跳出锁定状态时,提高环路以短期存储,并迅速恢复信号。 微分电路:输出电压与输人电压成微分关系的电路,由电阻和电容组成。vco振荡器:在振荡电路中采用压控元件作为频率控制器件的振荡器,vco是压控振荡器的简称。 最小移频键控(gmsk):是一种使调制后的频谱主瓣窄、旁瓣衰落快,从而满足gsm系统要求的信道宽度为200khz的要求,节省频率资源的调制技术。pcm编码(又叫脉冲编码调制):数字通信的编码方式之一。主要过程是将话音、图像等模拟信号每隔一定时间进行取样,使其离散化,同时将抽样值按分层单位四舍五人取整量化,同时将抽样值按一组二进制码来表示抽样脉冲的幅值。时分多扯tdma与载频复用技术:gsm系统采用频分复用技术,整个工作频段分为 124对载频,其载频间隔为200khz,双工间隔为45mhz。上行频段(移动台到基站)为890mhz-gl5mhz,下行频段(基站到移动台)为935mhz-960mhz。在上、下行频段中序号为 n(n=l~124)的载频对的频率可用 fu(n)=890+0.2nmhz(上行)或 fd(n)=935+0.2nmhz=fu(n)+45mhz(下行)。在每个射频信道,gsm系统采用了时分多址接人技术,每个载频按时间划分成tdma帧,其帧长为 4.6ms;每个 tdma帧分割为 8个时隙,时隙长为557 ps。因此在一个载频上可以有8台手机同时工作(一个手机占用一个时隙)。gsm手机在接收发射时使用同样的时隙号,而接收的tdma帧开始时刻相对于发射的tdma帧开始时刻延迟了3个时隙的时间间隔,使时间的接收发射时隙分开,即tdma帧的交错,避免了gsm在同一时间同时接收发射引起的于扰,所以gsm手机没有采用价格昂贵的双工滤波器,从而也降低了成本。数字信号调制与解调技术:gsm系统为了满足移动通信对邻信道干扰的严格要求,采用高斯滤波最小移频键调制方式(gmsk),这种gmsk调制方式,调制速率为270833kbe,每个时分多址tdma帧占用一个时隙来发送脉冲簇,其脉冲簇的速率为33.86kbo。 抗干扰、抗衰落技术:gsm系统采用循环冗余码对话音数据进行保护,以提高检错和纠错的能力(即信道编码技术)。采用将一个语音帧内的456bit数据分散到相邻的8个时分多址tdma帧中,这样即便丢失一个时分多址tdma帧也可以通过信道编码将其恢复;采用自适应均衡技术解决多径衰落引起的时延扩展导致码元串扰;采用伪随机跳频序列(每秒跳频217次,即每帧跳一次频),解决同频干扰和频率选择性的衰落问题。

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