Switching Power Supply consists of four parts: main circuit control circuit, detection circuit and auxiliary power supply.
1. Main circuit impulse current limiting: Limit the impulse current on the input side at the moment of switching on the power supply.
Input filter: its function is to filter the clutter existing in the power grid and prevent the clutter generated by the machine from feeding back to the power grid.
Rectification and filtering: directly rectify the AC power supply of the power grid into a smoother direct current.
Inverter: The rectified direct current is converted into high-frequency alternating current, which is the core part of high-frequency switching power supply.
Outgoing rectification and filtering: provide stable and reliable DC power supply according to load requirements.
2. The control circuit, on the one hand, samples from the outgoing end, compares it with the set value, and then controls the inverter to change its pulse width or pulse frequency to make the outgoing stable. On the other hand, according to the data provided by the Test circuit, through the identification of the protection circuit, the control circuit is provided to carry out various protection measures for the power supply.
3. The detection circuit provides various parameters and various instrument data in operation in the protection circuit. 4. Software for auxiliary power supply to realize power supply (Remote)Start, for the protection circuit and the control circuit (PWM and other chips)Work power supply.
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