DC power supply surge suppressor

Abstract

The invention relates to a direct-current power surge suppresser which includes the surge voltage sampling circuit, the voltage clamping circuit, the over-voltage switching circuit, the solid state relay and the cabinet. After the electrify, the surge voltage sampling circuit carries on the timing sample on the change of the supply voltage, when the signal voltage surpasses the threshold value of the voltage clamping circuit, the over voltage switching circuit lead, the control input end of the solid state relay is close to the'0V' electric potential, the solid state relay closure, thus has protected the subsystem equipment; after the surge, the sampling voltage of the surge voltage sampling circuit will be lower than the threshold value of the voltage clamping circuit, the over voltage switch closure, the solid state relay lead, the subsystem obtains the normal power supply. Because of using the separate part join structure, realized the protection function in the direct-current power supply system. It has enhanced the anti-impact ability of the system, has protected the subsystem equipment; after the surge, subsystem has rapid normal power supply. It is economical, safe and practical.

Description

technical field [0001] The DC power surge suppressor of the invention belongs to the technical field of power supplies. Background technique [0002] For the high-current DC power supply system, when supplying power to multiple subsystems, when a certain high-current subsystem suddenly stops supplying power, for example, when the aircraft retracts the landing gear, a 40V-80V power supply will be generated on the total power line Surge signal, the duration of this signal is in the range of 10ms to 100ms. This surge voltage is quite unfavorable to the normal operation of each subsystem. In severe cases, it can directly break down the power supply system of the subsystem or the electronic devices of the subsystem, causing The irreversible damage of the sub-system, the power surge suppressor of the present invention is to solve: when the surge occurs, the power surge suppressor can protect the sub-system, after the surge, the sub-system continues to work normally, thereby avoid...

AI Technical Summary

Problems solved by technology

[0003] Judging from the current international and domestic products, there are AC power supplies such as AC220V 50Hz AC power protectors, which are mainly used in civilian electrical appliances; while DC power protectors have not formed products. When DC power supplies work in industry and military, Many subsystems rely on the impact resistance of the power system itself. Some of them automatically cut off the power supply of the subsystem when the surge arrives. After the surge, the subsystem cannot automatically resume normal operation. When the subsystem needs to be powered on again, the subsystem can resume normal operation. , has certain defects

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