High voltage direct current control switch

Abstract

The invention aims at providing a high voltage direct current control switch which is arranged at an output end of a high voltage direct current power supply and comprises an MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor) electronic switch power circuit, and a control circuit for controlling opening and closing of the MOSFET electronic switch power circuit, wherein the control circuit comprises a current sampling circuit for sampling output current of the high voltage direct current power supply, a switch control circuit generating control signals to control the opening and closing of the MOSFET electronic switch power circuit, and a singlechip. The high voltage direct current control switch comprises the MOSFET electronic switch circuit and the MCU (Micro Controller Unit) intelligent control circuit; the MOSFET electronic switch circuits can be in parallel connection to form a multiway switch; and the whole scheme can realize an intelligent electronic switch which achieves multiple parallel switches, spark-free switch motion and mutual delay among the switches, and has functions of short-circuit protection, self recovery after removal of a short-circuit fault, and the like.

Description

technical field [0001] The invention relates to the field of switches, in particular to an electronic switch arranged at the output end of a DC high-voltage output power supply to control the connection or disconnection of a load. Background technique [0002] At present, communication equipment generally adopts centralized power supply. After the alternating current is rectified and filtered in the computer room to form direct current high voltage (200~~400VDC), it is transmitted to each communication terminal through a dedicated power line for use by the communication terminal. On the high-voltage DC side, mechanical switches are generally used for distribution, but when the mechanical switch is closed or disconnected, a strong arc will be generated between the mechanical contacts; if no corresponding arc suppression measures are taken, the contacts will burn out and fail to work. A burning switch could even start a fire. Contents of the invention [0003] The present i...

AI Technical Summary

Problems solved by technology

On the high-voltage DC side, mechanical switches are generally used for distribution, but when the mechanical switch is closed or disconnected, a strong arc will be generated between the mechanical contacts; if no corresponding arc suppression measures are taken, the contacts will burn out and fail to work. A flaming switch could even start a fire

Images