Intelligent power management control system

The utility model discloses an intelligent power management control system. The system comprises an RC522 time frequency card reader, a control module, a power supply module and a communication module. According to the utility model, the danger of using a resistance-capacitance step-down circuit or the defect of complexity of a peripheral circuit caused by using an ACDC step-down chip in the traditional process of converting an alternating current power supply into a direct current power supply is abandoned, and the isolation type resistance-capacitance step-down circuit is used for stably and safely obtaining a 5V direct current power supply from a 220V power supply at low cost, so that the size of the circuit is effectively reduced. Current sampling is realized by connecting the current transformer with the amplifying circuit. Compared with a conventional method of differentially amplifying the current signal by parallel resistors, the circuit power consumption is reduced by using the current transformer. 本