What is the basic component of switching power supply?
Switching power supply is made up of what parts?
Roughly by the main switch power supply circuit, control circuit, detection circuit, auxiliary power supply of the four most.
1, main circuit impact current limiter: limit the impact of the instantaneous input side current power supply is connected.
There is filter grid input filter: the role of clutter or hinder the machine produce clutter feedback back to the grid.
Rectifying and filtering: the grid ac power rectifier for a smooth dc directly.
Inverter: after the rectifier dc into high frequency alternating current (ac), which is the core part of high frequency switch power supply.
The output rectifier and filter: according to the requirements of the load, dc power supply to provide stable and reliable.
2, on the one hand, from the output end of the sampling control circuit and comparing with set point, and then to control the inverter, change the pulse width and pulse frequency, output stability, on the other hand, according to the data provided by the test circuit, protect circuit differential, provide control circuit for power supply all kinds of protection measures.
3, detection circuit protection circuit is running in the various parameters and various instrument data.
4, auxiliary power to realize power software (
Start, to protect the circuit and control circuit,
PWM chip etc. )
Working power supply.