What is the waveform after rectification by the rectifier bridge

A rectifier bridge is a circuit device used to convert alternating current into direct current. It converts the positive and negative half cycles of alternating current into direct current signals of the same polarity. A rectifier bridge is generally composed of four diodes,

It can be four ordinary diodes or a single rectifier bridge circuit chip integrated together.

The waveform shape of the rectified AC signal by the rectifier bridge depends on the characteristics of the input signal and the type of rectifier bridge. Here are two common types of rectifier bridges and their waveforms.

1. Single phase rectifier bridge waveform: When the input is single-phase AC power, the rectifier bridge can convert the positive and negative half cycles into DC electrical signals of the same polarity. In an ideal situation, the rectified waveform should be a pulse shaped DC signal.

That is to say, positive and negative half cycles alternate, forming a stable DC electrical signal. However, in practical situations, the rectified waveform may exhibit a certain degree of ripple due to the influence of circuit component characteristics and load characteristics,

There is a certain amount of AC component superimposed on the DC signal.

2. Three phase rectifier bridge waveform: When the input is three-phase AC power, a three-phase rectifier bridge composed of six diodes can be used for rectification. The shape of the waveform is similar to that of a single-phase rectifier bridge, except that there will be periodic changes in the three-phase input AC signal.

The rectified waveform is also a pulse shaped DC signal, with smaller ripple and AC components compared to a single-phase rectifier bridge.

It should be noted that there are still certain ripples and AC components in the rectified DC waveform. If a more stable DC signal is needed, a filtering circuit can be combined to further smooth the output waveform, reducing the influence of ripple and AC components.