1) frequency converter
变频机
1.
The application of frequency division characteristics of harmonic wavelet to the extraction of feature signal of rotor broken bar fault was introduced,as well as the application of frequency converter fault detection system with digital signal processing as the core to the detection of rotor broken bar fault was presented.
介绍了应用谐波小波的分频特性提取转子断条故障特征信号,利用数字信号处理器为核心的变频机故障检测系统实现转子短条故障的检测。
2.
When a fault of the rotor bar of an frequency converter has taken place,the characteristic signal components of the currents will be added into the stator current.
变频机转子发生断条故障时,定子电流中将产生相应特征频率的电流分量。
3.
The interference of frequency converter to measurement instruments is introduced & analysed in this paper.
介绍变频机对现场测量仪表的干扰 ,对其进行简要分析 ,并列举实例提出解决措施。
2) variable frequency motor
变频电机
1.
As for absence of performance curve of silicon steel sheet supplied with variable frequency power, difference between design value and testing value of manufactured variable frequency motors is increased.
设计变频电机时 ,由于非工频电源供电时硅钢片的特性曲线未知 ,会使电机设计值与实验值之间出现误差。
2.
Combining spectrum characteristics of electromagnetic noise with NSYS analysis of stator core inherent vibration frequency,reason for high-frequency electromagnetic noise of variable frequency motor was analyzed,and a series of measures to improve were proposed.
采用分析电磁噪声的频谱特性与有限元法分析定子铁心固有振动频率相结合的方法,对变频电机产生高频电磁噪声的原因进行分析,并提出了一系列的改进措施。
3.
A fault diagnosis method for variable frequency motor is presented,which is based on advanced MCSA and fuzzy inference.
提出一种基于改进的定子电流信号分析(MCSA)和模糊推理的变频电机转子故障诊断方法。
3) inverter-fed traction motor
变频电机
1.
Contrast aging tests are carried out on twisted pairs simulating inter-turn insulation and insulation to ground of inverter-fed traction motor under AC and square wave pulse conditions.
笔者通过采用两种电压源对模拟变频电机匝间绝缘和对地绝缘的绞线对试样进行老化试验,测量了tanδ随老化时间的变化趋势,分析了电压形式对匝间绝缘和对地绝缘介质损耗产生和发展的作用机理。
2.
Contrast aging tests are carried out on twisted pairs simulating inter-turn insulation of inverter-fed traction motor under AC and square wave pulse conditions.
变频电机匝间绝缘承受来自逆变器的连续高压脉冲方波的作用,为探讨工频正弦电压作用下具有很大差异的老化机理,通过采用工频正弦和高压脉冲方波两种电压源对模拟变频电机匝间绝缘的绞线对试样进行了电热联合老化对比试验,测量损耗角正切tanδ随老化时间的变化趋势,并结合热刺激电流测量结果,分析了电压形式对匝间绝缘介质损耗产生和发展的作用机理。
3.
Partial discharge(PD)is one of the key factors in insulation failure of inverter-fed traction motor.
局部放电是导致变频电机绝缘失效的主要原因之一。
4) frequency converter sets
变频机组
1.
Research on the fault diagnosis method of frequency converter sets;
小波变换在变频机组定子故障诊断中的仿真研究
2.
Rotor bar-broken fault is one of ordinary faults of frequency converter sets which will brings big economic loss and bad society effect.
在变频机组的常见故障中,转子断条故障是变频机常见故障之一,严重时会造成重大的经济损失和恶劣的社会影响。
5) inverter-fed motors
变频电机
1.
Electric aging mechanism of wire insulation in inverter-fed motors;
变频电机的匝间绝缘电老化机理
2.
In this paper, working conditions and failure mechanisms of insulating materials in inverter-fed motors were analysed.
分析了变频电机绝缘材料的工作环境和破坏机理,概述了耐电晕绝缘材料的研究及其在变频电机中的应用现状,讨论了我国在该领域存在的问题,提出了今后耐电晕绝缘材料的研究重点。
3.
It is one of the important ways to use corona-resistant material as insulating material of the wire for inverter-fed motors.
采用耐电晕材料作为变频电机的漆包线绝缘是延长变频电机使用寿命的重要途径之一。
6) Variable-frequency motor
变频电机
1.
Development of XLPE insulated cable for variable-frequency motor;
变频电机用交联聚乙烯绝缘电缆的发展
2.
This paper presents the development at home and abroad of the corona resistant winding wires used in variable-frequency motors in the background of the development of AC motors with speed regulation by frequency change.
本文以变频调速交流电机的发展为背景,综述了国内外变频电机用耐电晕绕组线发展概况,最后提出我国今后发展的几点建议。
3.
In this article,based on the cost and technical analysises of the common programs that are used to avoid the bearing current of variable-frequency motor and the corresponding solutions of the existed problems,a new type interlayer insulation bearing house that is not only safe reliable but also easy operation and low cost has been designed and used in practices.
通过对变频电机防止轴承电流的常用技术方案进行成本及技术分析,并根据存在问题,找出应对方案,设计出一种既安全可靠,又操作方便,成本低的新型夹层绝缘轴承室,并应用于实践。
补充资料：同步变频机
把交流系统一种频率的电能变换成另一种频率的电能的同步电机。由两台工作在不同频率下的同步电机直接连接而成。根据功率流向的不同，其中一台作同步电动机运行，另一台作同步发电机运行，由此可把交流电从一种频率转变成另一种频率。同步变频机的频率变比是固定的，大多用于连接两种固定的不同频率的电力系统。为了使同步变频机能同时与这两个不同频率的电力系统保持同步，变频机的容量不能太小，它应达到两个系统中容量较小的系统容量的20％左右，以便依靠变频机本身的整步功率，使小容量系统的频率能追随大系统的频率,从而使变频机与两个电力系统同时保持同步,否则变频机就可能出现失步现象。
为了便于调节变频机组电动机侧和发电机侧端电压的相位，以利机组投网运行和负载转移，变频机组的一台同步电机往往带有定子转动装置。电枢围绕转轴转动一个角度，就调节了电枢绕组中感应电动势的相位。
为了便于调节变频机组电动机侧和发电机侧端电压的相位，以利机组投网运行和负载转移，变频机组的一台同步电机往往带有定子转动装置。电枢围绕转轴转动一个角度，就调节了电枢绕组中感应电动势的相位。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条