Power switching method switching power supply, also known as switching switching power supply and power switch SPWM, is a high-frequency electromagnetic energy conversion equipment and a kind of switching power supply. Its function is to change a standard operating voltage into the operating voltage or current required by the local terminal through the framework of different methods.
The input of switching power supply is mostly AC or DC regulated power supply, while the output is mostly machinery and equipment requiring DC regulated power supply, such as personal computer, and switching power supply changes the operating voltage and current between each other.
Switching power supply is different from linear regulated power supply. Most of the conversion crystal triodes used by switching power supply are converted in the center of full opening method and full closing method. These two methods have the characteristics of low loss. The conversion center will show high loss, but the time is very short. Therefore, the switching power supply saves energy and forms less equipment temperature. Ideally, switching power supply itself is not easy to consume electromagnetic energy.
Power switch electric operation voltage regulator is achieved by regulating the on-off and short-circuit time of crystal triode. Conversely, in the whole process of forming the output voltage, the linear regulated power supply will consume electromagnetic energy when the crystal triode becomes larger in operation. The high conversion efficiency of switching power supply is one of its major advantages. Moreover, because the output power of switching power supply is high, small-size and light net weight transformers can be applied. Therefore, the specification of switching power supply will be smaller than that of linear regulated power supply, and the net weight will be lighter.
If the high efficiency, volume and net weight of the switching power supply are considered, the switching power supply is better than the linear regulated power supply. However, the switching power supply is very complex, and the internal crystal triode will often convert. If the conversion current is not processed in many aspects, it is likely to form noise and disturbing signals, which will endanger other machines and equipment. Moreover, if the switching power supply has no special design scheme, the power requirements of the switching power supply are likely not high.
