3BHE014070R0101 ABB  电压滤波

3BHE014070R0101

基本信息

产品编号：3BHE014070R0101

ABB型号名称：3x80uF， 2750V

目录说明：3x80uF， 2750V;电容器、滤波器

详细描述：3x80uF， 2750V

在3BHE014070R0101整流电路输出的电压是单向脉动性电压，不能直接给电子电路使用。所以要对输出的电压进行滤波，消除电压中的交流成分，成为直流电后给电子电路使用。在滤波电路中，主要使用对交流电有特殊阻抗特性的器件，如：电容器、电感器。本文对其各种形式的滤波电路进行分析。

一、3BHE014070R0101滤波电路种类

滤波电路主要有下列几种：电容滤波电路，这是最基本的滤波电路;π 型 RC 滤波电路;π 型 LC 滤波电路;电子滤波器电路。

二、3BHE014070R0101滤波原理

1. 单向脉动性直流电压的特点

如图 1(a)所示。是单向脉动性直流电压波形，从图中可以看出，电压的方向性无论在何时都是一致的，但在电压幅度上是波动的，就是在时间轴上，电压呈现出周期性的变化，所以是脉动性的。

但根据波形分解原理可知，这一电压可以分解一个直流电压和一组频率不同的交流电压，虚线部分是单向脉动性直流电压 U。中的直流成分，实线部分是 UO 中的交流成分。

3BHE014070R0101 ABB  电压滤波

3BHE014070R0101

Basic information

Product number: 3BHE014070R0101

ABB model name: 3x80uF, 2750V

Description: 3x80uF, 2750V; Capacitors, filters

Detailed description: 3x80uF, 2750V

The output voltage of the 3BHE014070R0101 rectifier circuit is unidirectional pulsating voltage and cannot be used directly to the electronic circuit. Therefore, it is necessary to filter the output voltage, eliminate the AC component of the voltage, and become direct current to the electronic circuit. In the filter circuit, the main use of AC has special impedance characteristics of the device, such as: capacitors, inductors. In this paper, various kinds of filter circuits are analyzed.

First, 3BHE014070R0101 filter circuit type

The filter circuit mainly has the following types: capacitor filter circuit, which is the most basic filter circuit; π-type RC filter circuit; π-type LC filter circuit; Electronic filter circuit.

Second, filtering principle

1. Characteristics of unidirectional pulsating DC voltage

As shown in Figure 1(a). As can be seen from the figure, the directivity of the voltage is consistent at any time, but it fluctuates in voltage amplitude, that is, on the time axis, the voltage shows periodic changes, so it is pulsating.

However, according to the principle of waveform decomposition, this voltage can be decomposed into a DC voltage and a group of AC voltages with different frequencies, and the dashed line is the unidirectional pulsating DC voltage U. The DC component in the UO is the AC component in the solid line.