Seamless switching relay device and method based on super-capacitor direct-current back-up power source

Abstract

The invention discloses a seamless switching relay device and method based on a super-capacitor direct-current back-up power source. The device comprises a direct connection switch S1, a power resistor RC, a super capacitor C, a DC / DC boost module, a change-over switch S2, intelligent equipment, a main control module and a sampling circuit. One end of the direct connection switch S1 and one end of the power resistor RC are connected with a direct current input power source, two paths of output of the DC / DC boost module are connected with the intelligent equipment through the change-over switch S2; the control end of the direct connection switch S1 and the control end of the change-over switch S2 are both connected with an IO control pin of the main control module; and the direct current input power source is connected with one AD sampling pin of the main control module through one sampling circuit, and the input end of the intelligent equipment is connected with the other AD sampling pin of the main control module through the other sampling circuit. The device has the advantages that seamless switching in the whole emergency power loss process is achieved, and the dangerous process of operation rejection or misoperation is avoided.

Description

technical field [0001] The invention relates to the field of emergency power supply of a backup power supply, and more particularly relates to a device and method for seamless switching of a DC backup power supply based on a supercapacitor. Background technique [0002] At present, all fields of society have been developed in the direction of intelligent automation. Various intelligent control devices running logic control algorithms are distributed in various intelligent automation application systems as the control core. Intelligent control equipment is integrated and assembled by multiple different precision control chips. The control chip requires DC power supply and has high requirements for the stability of the power supply. The intelligent control equipment is powered by the power supply of the application system during normal operation, and powered by the backup power supply of the system when the power supply fails. The backup power supply is usually realized by UPS...

AI Technical Summary

Problems solved by technology

However, there is a millisecond-level processing process in the process of detecting power-off input capacitors. During this process, the intelligent control equipment is in a power-off state, resulting in a time width of milliseconds in the power-on voltage level during the emergency power-on switching process. U-shaped sag, this voltage sag causes some voltage-sensitive intelligent control equipment to be powered off and restarted, and at this time the intelligent control equipment is monitoring various key states of the emergency power-off process, and the equipment restart caused by the voltage U-shaped sag will be The critical period leads to the loss of key data, which affects the logical operation judgment of the intelligent control equipment during the switching emergency period, and the dangerous process of refusal to operate or misoperation occurs

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