DC regulated power supply: Rectifying Circuit

Electronic Circuits Require DC power supply to provide energy. Because the battery cost is high, it is generally only used in low-power portable instruments. Here we will discuss how to convert an AC power supply to a DC regulated power supply. The general DC power supply consists of the following parts: the rectification circuit is to convert the Power Frequency AC to the pulsating DC power. The filter Circuit filters out the AC components in the pulsating DC to reduce the AC components and increase the DC components. The regulator circuit uses the negative feedback technology to further stabilize the DC voltage after rectification.

(1) half-wave rectification circuit: the half-wave rectification is to use the one-way conductive performance of the diode, so that the voltage Vo produced by the transformer can reach the load in only half a cycle, as shown below:

(2) full-wave rectification circuit: using a transformer with a center tap on the secondary side and two diodes to form a full-wave rectification circuit, as shown in. It can be seen that both the plus and minus half weeks have current flowing through the load, improved the rectification efficiency.

(3) Single-phase bridge rectification circuit is the most basic circuit to convert AC to DC. When the working principle of the rectification circuit is analyzed, the diode in the rectification circuit has one-way conductivity. When the positive half week, the diode D1 and D3 are turned on, and the positive half week of the sine wave is obtained on the load resistance. When the negative half week, the diode D2 and D4 are turned on, and the negative half week of the sine wave is obtained on the load resistance. After the positive and negative half-weeks of the load resistance are synthesized, the unidirectional pulse voltage in the same direction is obtained.