The technical parameters of the inverter (Variable-frequency Drive, VFD) are divided into the input side and the output side. The technical parameters of the input side of the VFD include input voltage, number of phases and frequency; The technical parameters of the output side include additional output voltage, additional current, additional capacity, capacity, frequency accuracy, frequency resolution, protection level and other performance indicators.
1. Additional data on the input side
(1) Input voltage U (IN). That is, the additional operating voltage on the power supply side. In China, the input voltage of low-voltage VFD is generally 380V (three-phase) and 220V (single-phase). In addition, the VFD also specifies the promised fluctuation scale of the input voltage, such as 10%, -15% - +10%, etc.
(2) Number of phases: single-phase and three-phase.
(3) Frequency f (inch). That is, the power frequency (often called the power frequency), which is 50Hz in China. The frequency of the promised shake is generally 5%.
2. Extra data on the output side
(1) Additional output voltage U(N). The U(N) boundary is said to be the maximum output voltage, since the output voltage of the VFD changes with frequency. It is determined by the additional operating voltage, which is generally equal to the input voltage U (IN).
(2) Additional current I(N). The maximum current that the VFD promises to output over a long period of time.
(3) Additional capacity S(N). Determined by the product of the additional line voltage U(N) and the additional line current I(N), S(N) = 1.732×U(N)×I(N).
(4) Capacity P(N). The maximum promised motor capacity under continuous constant load.
Note: In the production machinery, the capacity of the motor is mainly determined according to the heating situation. Under variable load, intermittent load and short-term load, as long as the temperature rise does not exceed the promised value, the motor is promised to be overloaded for a short time (a few minutes or dozens of minutes), while the VFD does not agree. Therefore, when choosing a VFD, the working conditions of the load should be fully considered.
(5) Overload ability. Refers to the multiple and moment when the output current of the inverter promises to exceed the additional value, as determined by the inverter module. The overload of most VFDs can be specified at 150% and 1min; 180%, 5s. It can be seen that the promised overload time of VFD is insignificant compared with the motor.
In addition, there are performance indicators such as frequency accuracy, frequency resolution, and protection level.
|
More on that
|
LS Group witnesses the reopening of the "Viet Nam Professional Football League".
The Viet Nam Professional Football League, sponsored by LS Group, began operations in June and is hosted by Viet Nam Professional Football Joint Stock Company. With the comeback of football events such as the Korea K League and the Bundesliga, more and more football events are also brewing to restart.
...
|
|
Energy-saving method of ventilator inverter - LS power generation
high-power
Although some inverters are fan type inverters, but it is a low-power fan inverter, such an inverter does not have the effect of energy saving, and it is necessary to achieve energy saving must be a high-power inverter, in addition to the high-power fan inverter, it is necessary to meet its ...
|
|
产电带你读懂PLC梯形图
一、梯形阶梯都是始于水平线，总算垂直线（一般可以省掉不画，仅画左母线）。每行的左面是接点组合，表明驱动逻辑线圈的条件，而表明效果的逻辑线圈只能接在右边的母线上。接点不能出现在线圈右 ...
|
|
变频器的作用——LS产电
1.变频器能够调整电机的功率，完成电机的变速运转，以此来到达省电的目的。比如体现在离心风机和水泵上，当离心风机和水泵使用了变频器后，操作人员变频调速，可根据需要轻松操控流量，从而节省 ...
|
|
LS产电变频器与伺服的区别
伺服与变频的一个重要区别是: 变频可以无编码器，伺服则必须有编码器，作电子换向用。
一、两者的共同点:
交流伺服的技术自身就是学习并应用了变频的技术，在直流电机的伺服控制的基 ...
|
|
LS变频器系列及其特点
LS变频器，全称为LS沟通变频调速器，经过供给多种使用装备，将直流电转换为沟通电，并经过改动普通电源输入的电压和频率来操控电机的转速，满意不同的工业需求，然后完成主动化体系的节能环保。 ...
|
|
拉伸试验机变频器维护注意事项——LS产电
在定期查看拉伸试验机变频器（Variable-frequency Drive，VFD）的过程中、这里咱们可以从外部直接目视查看运行状况。
(1)环境温度正常，要求在-10℃至+40 ...
|
|
关于电气设备的介绍——LS产电
依据发电厂和变电站电能的生产、变压、运送、分配和使用的安全、优质、可靠以及经济运转的要求，主要有下列电气设备。
1.一次设备
直接参与生产、 ...
|
|
接线端子常见故障——LS产电
接线端子从运用视点讲，应该到达的功用是：触摸部位该导通的当地有必要导通，触摸牢靠。绝缘部位不该导通的当地有必要绝缘牢靠。接线端子常见的故障形式有以下三种：
...
|
|
高低压开关柜导线颜色的选择——LS产电
1 交流三相电路
a）A相用黄色，B相用绿色，C相用赤色；
b）零线或中性线用淡、蓝双色；
C）安全用的接地线用黄绿双色线。
2 用双芯导线或双根绞线衔接的交流电路：红、黑 ...
|
|
变频器转矩直接作为被控制量方式——LS产电
VVVF变频、矢量操控变频、直接转矩操控变频都是交—直—交变频中的一种。其共同缺点是输入功率因数低，谐波电流大，直流电路需求大的储能电容，再生能量又不能反应回电网，即不能进行四象限运行 ...
|
|
变频器使用注意事项——LS产电
一、变频器不要装在有震动的设备上，由于这样变频器里边的主回路联接螺丝简单松动，有不少变频器就由于这原因此损坏。
二、接线问题：变频器输入端接上一个空气最初维护电流以值不能太大， ...
|
|
变频器带载试运行步骤——LS产电
1.手动操作变频器面板的工作中止键,调查电机工作中止进程及变频器的显现窗,看是否有异常现象。
2.假如发动P中止电机进程中变频器呈现过流维护动作, ...
|
|
LS产电塑壳断路器常识
（1）脱扣
LS产电塑壳断路器它基本上在实践运用的进程中会涉及到关于脱扣的单元，脱扣一般都是热磁脱扣或许电子脱扣的脱扣方式。
在实践应用的进程中假如是对LS产电塑壳断路器的 ...
|
|
Basic introduction to transistors - LS produces electricity
A transistor is a solid-state semiconductor device with a variety of functions such as detection, rectification, amplification, switching, voltage regulation, and signal modulation. A transistor is a variable current switch that can manipulate the output current based on the input voltage. Unlike general mechanical switches (e.g. Relay, swit...)
|
|
LS产电Metasol系列产品型号及特点
Metasol系列MS（100A及以下）产品新品上市首要产品规格：接触器、热继电器、中心继电器。
产品特色：
体型小巧，内部结构密封，安全系数高
...
|
|
电动机的维护和保养方法——LS产电
1、看：电动机的正常作业与周围环境有很大的联系。因此每天的巡查过程中，查看电动机周围的漏水﹑滴水状况（会引起电动机的绝缘低而形成击穿以致烧坏），查看电动机外围是否有影响其通风散热环 ...
|
|
Introduction to the design of inverter control cabinet - LS power production
The inverter should be installed inside the control cabinet, and the following problems should be paid attention to when planning the control cabinet:
1) Heat dissipation issues:
The heating of the inverter is caused by internal losses. In the inverter, the main circuit is the main circuit for the loss of each part, accounting for about 98%, and the control circuit accounts for 2%. ...
|
|
变频器的基本组成——LS产电
变频器通常分为4部分：整流单元、高容量电容、逆变器和操控器。
整流单元：将工作频率固定的交流电转换为直流电。
高容量电容：存储转换后的电能。
...
|
|
Failure analysis of electromagnetic system of LS power production contactor
(1) The core noise is large: it is normal for the electromagnetic system to produce a slight humming sound during operation, if the sound is too loud or abnormal, it can be judged that the electromagnetic system has a problem, and there are three reasons:
(1) Poor contact between the armature and the core or tilting of the armature. After repeated collisions between the touch of the armature and the core, ...
|
|
Contact
working hours
