When the electronic circuit works, a direct current power supply is needed to provide energy, and the battery is generally only used in low-power portable instrument equipment because of high usage cost. Here to discuss how to convert AC power to DC power supply. The general DC power supply consists of the following components: The rectifier circuit converts industrial-frequency AC power into pulsed DC power. The filter circuit filters the AC components in the pulsating DC to reduce the AC component and increase the DC component. The voltage regulator circuit uses negative feedback technology to further stabilize the rectified DC voltage.
(1) Half-wave rectification circuit: Half-wave rectification is the use of the unidirectional conductivity of the diode, so that the voltage Vo out of the transformer can only reach the load after half a cycle, as follows:
(2) Full-wave rectification circuit: A full-wave rectification circuit as shown in the following figure is constructed by using a transformer with a center-tapped secondary and two diodes on the secondary side. From the figure, it can be seen that the current flows through the load during the positive and negative half cycles, improving the rectification efficiency. .
(3) The single-phase bridge rectifier circuit is the most basic circuit for converting AC to DC. When analyzing the working principle of the rectifier circuit, the diode in the rectifier circuit has unidirectional conductivity. In the positive half cycle, the diodes D1 and D3 are turned on, and a positive half cycle of the sine wave is obtained in the load resistance. In the negative half cycle, the diodes D2, D4 are turned on, and the negative half cycle of the sine wave is obtained on the load resistance. The positive and negative half cycles of the load resistor are combined to obtain the one-way ripple voltage in the same direction.
Headphone Cover,Earbuds Cover,Earphone Cover,Headset Covers
Nantong Boxin Electronic Technology Co., Ltd. , https://www.ntbosen.com