【Principle of DC power supply】
In simple terms, DC power supply is a process in which current flows from the positive electrode to the negative electrode, and further research, we will find that the electrons actually flow from the negative electrode to the positive electrode, and the positive current flows from the positive electrode to the negative electrode.
Now let me give you an example of an event in our life, we take a bowl of water and fall down from a height. Then there is no water in our bowl, and now we have to put the poured water back into the bowl to continue the pouring action.
In the same way, after we transport a large amount of electrons from the negative electrode to the positive electrode, a large amount of electrons are enriched in the positive electrode, and a large amount of electrons in the negative electrode are reduced in damage, then we will definitely not be able to continue to stabilize such a DC state, and we need some equipment to transport it. This electron, which is what we call dry batteries, accumulators, and DC motors, inside these devices, they can re-transport electrons from the positive electrode to the negative electrode to maintain a constant voltage and current in the circuit.
