Relay system with relative better arc protective circuit and its control method

Abstract

The present invention discloses a relay system with are protection circuit and its control method. Said relay system with are protection circuit includes load with first end and second end, relay coupled with common ground point and first end of load, and are protection circuit for eliminating are produced by said relay. Said are protection circuit includes an energy storage element, it has first end and second end, and parallel-connected with said relay, the first end of said energy storage element is coupled with first end of said load and is used for storing and releasing energy; and a high impedance element, it is coupled with second end of said load and is used for making said energy storage element attain the goal of quickly charging and slowly discharging.

Description

technical field [0001] The invention relates to a relay protection circuit and its control method for eliminating the arc generated by the relay, in particular to an arc protection circuit with relatively better effect in a relay system and its control method. Background technique [0002] Relays are an indispensable component in general applications, but there are often problems with insufficient withstand voltage of the relay, or the occurrence of arcs due to the large DC current flowing through the relay, which shortens the service life of the relay contacts in light cases, and seriously Otherwise, it will cause the contacts of the relay to melt down, and more seriously, there will be a risk of fire, which will cause a safety incident. Another situation is that when the operating voltage of the relay contact rises, the current that the relay can withstand will drop severely. The light one takes up the product volume but cannot meet the expected requirements, and the serio...

AI Technical Summary

Problems solved by technology

The arc protection circuit 31 formed by connecting the contacts of two relays in series can solve the arc problem, but it also leads to the problem of larger product size and increased cost.

while using Figure 4 The arc protection circuit 41 formed by connecting the double-gate (knife) relays in series to eliminate arcs also has its disadvantages, that is, it cannot be used in circuits with relatively large currents; because the current double-gate (knife) contact relays have The limitations of its own components prevent it from being used in circuits with relatively large currents

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