Patent ID: 7765416
Filing Date: 2010-07-27
Classification: H02J,H02M,Y02B,Y04S

Abstract:
1. A control device for a power supply with zero power consumption in standby mode, comprising: a driver, an intermediate relay, a power relay, a signal induction circuit, a working power supply monitoring circuit for controlled equipment, a power switching circuit, a single-chip microcomputer, and a battery; wherein: said single-chip microcomputer controls said intermediate relay via said driver; said intermediate relay has a normally opened contact connected in tandem to a coil of said power relay and then cross-connected to two AC power lines, an output end of said signal induction circuit is connected to a control end of said power switching circuit and said single-chip microcomputer, said battery is connected to a power end of said signal induction circuit and an input end of said power switching circuit, a second input end of said power switching circuit is connected to a working power supply unit for said controlled equipment, an output of said power switching circuit used as a power supply to said single-chip microcomputer and intermediate relay, and the control end of said power switching circuit connected to said single-chip microcomputer; an input end of said working power supply monitoring circuit for the controlled equipment is connected to the working power supply unit of said controlled equipment, an output end of said working power supply monitoring circuit is connected to said single-chip microcomputer; and the working power supply monitoring circuit is designed to monitor the working power supply for said controlled equipment; said single-chip microcomputer controls a working power supply channel to said controlled equipment via said power switching circuit, in accordance with the signal from the working power supply monitoring circuit for said controlled equipment; when said signal induction circuit receives a standby command, said single-chip microcomputer causes said intermediate relay and said power relay to cut off an AC power supply to said controlled equipment via said driver, and, at the same time, cut off the power supply to said single-chip microcomputer and intermediate relay via said power switching circuit; and said power switching circuit designed to choose the working power supply unit for said controlled equipment or said battery to supply power to said single-chip microcomputer and said intermediate relay or choose to close all power supply channels, in accordance with the command from said single-chip microcomputer.