The principle of DC power supply analysis

The circuit through which DC electricity passes is referred to as DC circuit, which is a closed conductive circuit composed of DC power supply and resistance. In this DC circuit, a constant electric field is formed. Outside the power source, positive charges flow from high potential to low potential through resistance. Inside the power supply, it overcomes the electrostatic force by the non-electrostatic force of the power supply, and then goes from low potential to high potential, and so on, forming a closed current line. Thus, in the DC loop, the power supply serves to provide a constant electromotive force that does not replenish joule thermal resistance consumption over time.

500KW load bank
Direct current (DC) is the unidirectional flow or movement of electric charges (usually electrons). The current density changes over time, but usually always moves in the same direction. As an adjective, DC can be used as a reference voltage (its polarity never changes).
On a DC circuit, electrons form from the cathode, negative and negative magnetic poles and move to the anode, positive and positive magnetic poles. However, physicists define direct current as movement from a positive to a negative terminal. Direct current is generated by electrochemistry, photoelectric elements and batteries. Instead, in most countries, the current flowing from the equipment is alternating current. Alternating current can be converted to direct current by a power supply consisting of a converter, a rectifier (which prevents the current from flowing in the opposite direction), and a filter (which eliminates jumps in the current flowing from the rectifier).