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What is the incomparable advantage of switching power supply and transformer power supply?

May 31, 2021

We all know that our life and industrial production all need to use electricity, and the electricity we use needs to be transformed from the high-voltage power of the power station. In our life, the common way to transform the high-voltage power supply into the low-voltage power supply is the transformer. But in addition to our common transformer power supply, there are better switching power supply for us to choose from. So, what are the advantages of this power supply compared with transformer power supply?


1、 Compared with the transformer power supply, the volume is much smaller

In order to change high voltage into low voltage, the transformer needs to change the power supply through magnet and transformer coil. The general transformer is based on 100 kg. The size of its volume can be imagined. Switching power supply transforms high voltage power supply into low voltage power supply through the switching function of transistor. Transistors can be made very small. So the volume of this kind of power supply can be compared with that of transformer power supply.

transformer power supply

2、 Low energy consumption and high power conversion efficiency

Because switching power supply uses transistor switch to control voltage conversion, it uses much less converter than transformer. Therefore, in terms of energy consumption, transformer power supply is much higher. Because it consumes less energy in the process of operation, it has high conversion efficiency of electric energy. Its conversion efficiency can reach up to 90%.

3、 The output is stable and can be integrated with short circuit and overvoltage protection circuit.

The switching power supply involves less circuit components, so it has less faults, and its output is more stable than that of transformer power supply. Moreover, other circuits can be arranged in the transistor circuit. For example, integration with short-circuit and overvoltage protection circuit is impossible for transformer.

The switching power supply has the advantages of small volume, high efficiency, lightning protection and short circuit protection.


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