Automatic Switching of AC and DC Input Circuit

Published:2011/5/17 6:01:00 Author:Joyce | Keyword: Automatic Switching, of AC and DC, Input | From:SeekIC

The following graph is the automatic switching of AC and DC circuit .After being depressurized by transformer T1, the electric supply will be output after rectifying, filtering and voltage stabilization to make the load work. Meanwhile, another route will go to the base of VT2 after going through a direct voltage produced by rectifying and filtering and being divided by RP. So VT2 will break over and VT1 will cut off. When the electric supply breaks off, VT2 will cut off and MOSFET VT1 will break over. Storage battery will supply the voltage-stabilizing circuit through VT1 andoutput stable direct voltage for the load. Due to the application of MOSFET to conduct fast electronic switching, this circuit has achieved the purpose of uninterrupted power supply.



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