What is the difference between a power supply and a transformer
A transformer is a device that uses the principle of electromagnetic induction to transform voltage, current and impedance. Transformers are mainly used in alternating circuit circuits.
Switching power supply is a kind of power supply that uses modern power electronics technology to control the time ratio of switching transistor on and off to maintain a stable output voltage. Switching power supply can be divided into two categories: AC/DC and DC/DC; according to the input and output Whether there is electrical isolation between them can be divided into two categories: one is called isolated DC/DC converter with isolation; the other is called non-isolated DC/DC converter without isolation. The switching power supply has protection functions such as overcurrent, overheating, and short circuit. It has a wide range of voltage input and isolating voltage between input and output. The isolated voltage between input and output is high.
LED display is usually composed of display module, control system and power supply system. The display module is composed of a dot matrix composed of LED lights, which is responsible for luminous display; the control system can make the screen display text, pictures, videos and other content by controlling the light of the corresponding area. It is responsible for converting the input voltage and current into the voltage and current required by the display screen. The switching power supply used in the power system has the characteristics of low cost, small size, light weight, simple peripheral circuit design, high efficiency, low noise, stable and reliable, etc.
The transformer of the switching power supply generally needs to leave an air gap, is it to increase the stored energy
First of all, to correct it, the transformer of the switching power supply generally needs to leave an air gap to see what kind of switching power supply it is:
Now that there is a transformer, you can actually search the flyback circuit on Baidu. The transformer in it needs an air gap to store energy. "Great.
You can also search for forward circuits or full-bridge, half-bridge, and push-pull circuits on Baidu. Their transformers do not need air gaps. This involves the working principle of their circuits, and air gaps will reduce their efficiency.
Finally, if your question is "the inductance of the switching power supply generally has an air gap, is it to increase the stored energy?", even if the question is rigorous. I can tell you that the air gap of the general inductor is similar to the transformer of the flyback circuit mentioned earlier. The air gap does not increase the energy to be stored, but enlarges the "container" for storing energy.
