< br >
AC\/DC power conversion principle is the principle of converting alternating current into direct current. This principle includes many different technologies, such as filtering, transformers, semiconductors, etc. Among them, transformers are the most commonly used, which can convert AC power into single-phase or multi-phase current. Filters are also essential, which can convert unstable AC power into stable direct current. Semiconductors are also used for this conversion, and they can convert alternating current into direct current in a way that greatly reduces power consumption.