Method and device for eliminating electric arc of direct current system socket and application of method and device

Abstract

The invention discloses a device and method for eliminating direct-current socket contact electric arcs. The device a main contact M+, a main contact M-, an auxiliary contact S, a semiconductor element trigger and overcurrent protection circuit (OCP), the main contact M+ and a load are in plug connection with a state detection circuit (SMC), an arc extinction unit energy taking circuit (GPC), and a load current transfer absorption circuit (TCR) composed of a semiconductor element T, a capacitor C, a resistor R and a transient voltage suppressor (TVS). The contact M+ is connected with the input pole of the T and the positive pole of the power supply, the contact S is connected with the output pole of the T, the R and the C are connected in series and then connected in parallel at two ends of the T, the TVS is also connected in parallel at two ends of the T, and the contact M- is connected with the negative pole of the power supply. Contacts of a traditional socket are divided into the main contact M+ and the auxiliary contact S, and the load current transferring and absorbing circuit is additionally arranged between the contact M+ and the contact S, so that no arc exists when a load plug and the socket are disconnected. The device and the method thereof are suitable for high-voltage or low-voltage direct-current sockets, and are simple, reliable and practical.

Description

technical field [0001] The invention belongs to the technical field of arc-free breaking in DC circuits, and in particular relates to a method for eliminating arcs between plugs and sockets in the process of plugging and unplugging DC sockets, as well as its device and application. Background technique [0002] The existing DC plug will generate a certain arc in the process of detaching from the DC socket, which not only affects the service life of the plug and socket, but also hinders safety, especially when the DC voltage is high or the current is large, the arc problem is more prominent , arc extinguishing measures are very necessary. The arc extinguishing method of the hybrid DC circuit breaker widely used at present is complex and difficult to control, and it is costly, bulky and difficult to apply to the DC socket. A newly emerging device using auxiliary moving contacts to realize arc suppression requires the use of mechanical devices, resulting in complex structure a...

AI Technical Summary

Problems solved by technology

[0002] The existing DC plug will generate a certain arc in the process of detaching from the DC socket, which not only affects the service life of the plug and socket, but also hinders safety, especially when the DC voltage is high or the current is large, the arc problem is more prominent , arc extinguishing measures are very necessary

The arc extinguishing method of the hybrid DC circuit breaker widely used at present is complex and difficult to control. It is costly, bulky and difficult to apply to the DC socket.

A new device that uses auxiliary moving contacts to realize arc suppression requires the use of mechanical devices, resulting in complex structure and low reliability, and is not conducive to miniaturization and practicality

Another type of arc extinguishing method through physical or chemical methods is to extinguish the arc after the arc occurs. The structure is complex and the cost is high. It is easy to burn the contacts and cause the life of the breaking device to be short.

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