Roughly from the main circuit switching power supply control circuits, test circuits, auxiliary power supply consisting of four parts.
1, the main circuit
The impact of current limiter: instantaneous input power limit the impact of the current side.
Input filter: its role is to filter the presence of clutter and obstruct the grid of the locally generated noise fed back to the grid.
Rectifier and filter: the AC power directly to DC rectifier for smoother.
Inverter: The DC rectified into a high-frequency alternating current, which is the core part of the high-frequency switching power supply.
Outgoing rectifier and filter: according to the load required to provide a stable and reliable DC power supply.
2, the control circuit
On the one hand from the outgoing end of the sample, is compared with the set value, and then to control the inverter, the pulse width or pulse frequency changing its make outgoing stable, on the other hand, the test circuit according to the data provided by the identification of the protection circuit It offers a variety of power control circuit for protective measures.
3, the detection circuit
Provide protection circuits of various parameters and various meter data is running.
4, auxiliary power
Realize the power of the software (remote) to start, for the protection circuit and control circuit (PWM chip, etc.) working power supply.