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variable frequency ˈvɛəriəblˈfri:kwənsi 短语⁷⁹⁷⁶² 基本例句 可变频率 The paper introduces principle and application of variable frequency starting system of high voltage synchronous motor by UKL“ Khemz” import. 介绍一种由乌克兰“汉姆斯”引进的高压同步电动机的变频起动装置。 dictall The world's only manufacturer who complete master the core technology of High-end four- quadrant high voltage variable frequency. 荣信公司是国内外唯一掌握高端四象限中压变频技术的厂家。 blog.sina.com.cn The Variable Frequency Speed adjustment system with slip control is a simple completion easy control suitable to be used in utility A. 带转差控制的变频调速系统是一种简单易行、控制清晰、适用于高精度、快速可逆的实用交流调速系统。 cnki A kind of medium voltage AC variable frequency control system, which consists of voltage source inverter, sinuous filter and stepup transformer with variable frequency, is introduced. 介绍一种采用低压电压型变频器、正弦波滤波器和变频升压变压器构成的低-高式中压变频控制系统。 cnki A two- stage compression variable frequency air source heat pumpTV-ASHP has been developed combining variable frequency technology with two- stage compression cycle. 将双级压缩和变频技术有机结合,提出一种适用于寒冷地区双级压缩变频空气源热泵系统。 dictall Analyses the energy saving potential of variable frequency drive VFD operation of the circulating pumps with different number of pumps in parallel under different control methods. 对不同并联台数及不同运行控制方式下循环水泵变频调速运行的节能特性进行了分析研究。 cnki Based on the application of VFSR variable frequency series resonance system in cable and GIS test system, the advantages and great future of variable frequency system are well explained. 结合 VFSR变频串联谐振系统在电缆和 GIS试验系统中的应用,阐述了变频谐振系统在高压试验中的优势和良好前景。 cnki Based on existing research results, this dissertation first presents a new fault detect and diagnosis method for AC variable frequency drives based on signal processing. 本文在现有研究的基础上,就基于信号处理的电动机变频调速系统的故障检测及诊断方法进行了深入研究。 cnki By adjustment to control signal, systems might realize variable voltage, variable frequency, steady voltage, steady frequency closed loop control. 通过对控制信号的调整,系统可实现变压、变频、稳压、稳频的闭环控制。 cnki Considering this, this paper presents a method by experiment which can measure performance curve of silicon steel sheet at different frequency as reference of designing variable frequency motor. 针对这种情况,本文提出一种实验的方法,测取不同频率下硅钢片的特性曲线,以供变频电机设计时参考。 cnki Dual- PWM variable frequency speed regulation system includes PWM rectifier and PWM inverter; key technology lies in PWM rectifier. 双 PWM变频调速系统包括 PWM整流和 PWM逆变两部分,关键技术在于 PWM整流部分。 cnki Electric drive automation is the basis of realizing industrial modernization, and variable frequency speed control is the core technique of electric drive automation. 电气传动自动化是实现工业现代化的基础,而变频调速是电气传动自动化的一项核心技术。 cnki For this project ABB Italy and ABB South Korea will supply low voltage switchgear, intelligent motor control units and variable frequency drives. ABB意大利公司和 ABB韩国公司将为这个项目提供低压开关柜,智能电机控制单元,以及变频器。 gkong In order to reduce energy consumption in air conditioning system, VRV of variable frequency technology is used in air conditioning. 为了降低空调系统的能耗,用变频技术空调中的变冷媒流量系统 VRV能达到节能效果; iciba In high precision variable frequency speed adjusting system, system's performances are guaranteed by accurate motor parameters. 在高精度变频调速系统中,准确的电动机参数是系统性能的保证。 cnki It has proven by practice that the two solutions both can implement Variable Frequency Control of AC Motor well, and have good applied cost. 实践证明,两种解决方案均能很好地实现交流电机的变频控制,具有良好的应用价值。 cnki It introduced principle of save energy resources of variable frequency and speed regulation, and practical apply in the vacuum make salt enterprise. 本文介绍了变频调速的节能原理及在真空制盐企业的实际应用。 cnki The beam pumping unit is modified into intelligent pumping unit by adopting variable voltage variable frequency VVVF, programmable logic controlPLC and power electronics. 在保留游梁式抽油机优点的基础上,采用变频调速、可编程控制和电力电子等高新技术将游梁式抽油机改造成为智能抽油机。 cnki |