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Disadvantages of switching power supply!

Categories:Company News
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Time of issue:2019-11-14
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(Summary description)The switching power supply looks compact, the power is related to the core transformer and the control method, the electromagnetic interference is large, and the ripple coefficient is large.

Disadvantages of switching power supply!

Categories:Company News
Author:
Origin:
Time of issue:2019-11-14
Views:0

Information

1. The switching power supply looks compact, the power is related to the core transformer and the control method, the electromagnetic interference is large, and the ripple coefficient is large. Especially in the category of audio and video, it is very sensitive to electromagnetic interference. In the audio, the sound is impure and thick, and there may be a slight sound; in the video, the image may have small ripples and not delicate.

2. The design is complicated, and the maintenance is not convenient. Often the more complicated the equipment is, the greater the possibility of problems. And once there is a problem with the switching power supply, the general non-professionals cannot repair it. Looking for someone to repair it, the cost is too high.

3. The small size is the advantage of the switching power supply, but the poor design becomes its disadvantage. In order to pursue smaller, a large number of components are squeezed into a small shell, the heat dissipation is not good, we have also used the shell deformation phenomenon in the past.

4. The components of the switching power supply are not very standard in selection. This is a common problem of domestic switching power supply. The relevant national quality inspection departments inspected the switching power supplies on the market and found that more than half of them were unqualified, including imported switching power supplies.

5. The biggest point is that the anti-lightning ability is very low. In the monitoring system, the possibility of being struck by lightning is also very large, mainly manifested by the string from the power supply, and the possibility of direct lightning strike is very small. Once the voltage of 220V suddenly becomes high, the switching power supply is burned in an instant. In a monitoring system some time ago, after a thunder, the monitoring main gate jumped, and after closing the gate, most cameras still work normally, and some monitors show no video signal. After inspection, it was found that all without video signals were switching power supplies (switching power supplies were used in places where installation was inconvenient during construction), and finally a power box was installed on the camera pole and a transformer power supply was replaced.

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