Рабочий принцип из мощность частота трансформатор и питание питание
Рабочий принцип А мощность частота трансформатор есть Относительно простой. The The Frequency AC voltage input input from the primary coil is converted into a magnetic field, which is transmitted through a magnetic material (обычно кремний сталь лист) to the вторичный coil to induce voltage voltage. The The output frequency is the same as the input frequency, and the voltage is reduced according to the ratio of the first stage coil turns (if there are more secondary turns, it is a boost). Due to the fact that the transformer outputs alternating current, while most electrical circuits use direct current, the voltage output by the transformer needs to be rectified, filtered, stabilized, and other circuits to become a relatively smooth and stable voltage for the load circuit to work.
The core transformer component of the switching power supply is still a transformer, and it also follow the rule that the voltage ratio is equal to the turn ratio. Unlike power frequency transformers, switching power supply needs need to increase their working frequency, which means they need to convert low-frequency AC voltage to high-frequency AC voltage, which requires the implementation of additional control circuits. Потому что в эксплуатация из цепь требует прямой ток, the input AC voltage needs to be rectified to become direct current voltage before it can be control through the subsequent circuit. Taking a commonly used mobile phone charge circuit as an example, let's briefly understand the working principle of a switching power supply.
After rectification and filtering, the input 220V AC voltage will become a DC voltage of around 310V (т.е. the peak of 220V AC voltage). Next, it is need to convert this DC voltage into high-frequency AC voltage. The simplest way to turn this voltage to high-frequency alternating current is to use a switch that quickly opens and closes, thus converting direct current into into high-speed pulse direct current voltage. the компонент that Реализует это переключатель Is A Транзистор. Транзисторы, Включая Commonly Используемые Транзисторы И Field-Effect Транзисторы, Can Be Used As Electronic Switches, By Controlling The Voltage of One PIN (the base of the Transistor and the Gate of the Field-effect Transistor), the Other Two PINS Can Be Controlled to Turn On Or Off.
With a switch, the next step is to have a circuit that controls the switch. The function of this circuit is to output high-speed switch signals to control the conduction and cutoff of the switch tube. This circuit is called an oscillation circuit. There are many types of oscillation circuits in switching power supplies, regardless of which one is used to provide control signals to the switching transistor.
After being control by control circuit, the input voltage changes from low-frequency AC to high-frequency pulse DC voltage. It is input to a transformer for voltage reduction, and the voltage output by the transformer is also rectified and filtered to become DC output, proprovisioning it to the load for operation. В отличие питание частота трансформаторы, the switching power supply also has an additional voltage detection circuit, which detects the output voltage signal and feeds it back to the primary control circuit of the transformer for voltage regulation. This improves the stability of the switching power supply's output voltage and allows for a wide input voltage range. Итак Работа Процесс Из А Переключение Питание Снабжение Есть Фактически Достигнуто через Несколько Процессы Из Ас TDC, DC AC, и затем AC DC.
Там может быть а вопрос здесь, isn't a трансформатор только способный из AC power, why can DC power power from a switching power supply also be transformed through a transformer? Transformers can only pass through AC power, specific requiring changes in magnetic flux. Power frequency AC power is a sine wave with a positive and negative half cycle, which will result in changes in magnetic flux. Switching power supply convert прямой ток в/импульсный прямой ток через а переключатель трубка. В переключатель трубка изменения магнитный поток отсечка к проводимость, и затем от проводимость к отсечка.
