Drive module of relay

Abstract

The invention provides a drive module of a relay. The drive module of the relay comprises a processor for outputting a control signal, a pulse generating circuit, a switch control circuit and a power input circuit, wherein the input end of the pulse generating circuit is connected with the output end of the processor, the pulse generating circuit is used for receiving the control signal and outputting a pulse signal, the signal input end of the switch control circuit is connected with the output end of the pulse generating circuit, the output end of the switch control circuit is connected with the input end of the relay, the switch control circuit is used for receiving the pulse signal and controlling on and off of the relay, and the power input circuit is connected with the power input end of the switch control circuit and is used for supplying power for the relay. The drive module of the relay has the advantages that powering-on time of the relay can be accurately controlled, the phenomenon that a coil inside the relay is heated and short-circuited and accordingly is burned out due to long-time electrification, most of drive module is controlled through hardware, 'uncontrolled running' or 'endless loop' of programs is avoided, and the drive module is safe and reliable.

Description

technical field [0001] The invention relates to a drive module, in particular to a relay drive module. Background technique [0002] Electromagnetic relays can realize remote control and automatic control. Electromagnetic relays are composed of electromagnets, armatures, springs, contacts, etc. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating Under the electromagnetic effect, the armature will overcome the tension of the return spring and attract to the iron core under the action of electromagnetic force, thereby driving the moving contact of the armature to attract the static contact (normally open contact). When the coil is powered off, the electromagnetic attraction will also disappear, and the armature will return to its original position under the reaction force of the spring, so that the moving contact and the original static contact (normally closed contact) will be released. In this...

AI Technical Summary

Problems solved by technology

However, many electromagnetic relays are not suitable for long-term power-on, because after long-time power-on, the internal coil of the electromagnetic relay will heat up and cause the coil to short-circuit and burn out

In addition, the use of software to control the power-on time of the relay is not reliable. Sometimes once the program "runs away" or enters the "dead loop" and cannot return correctly, the output terminal will remain in the "high" or "low" state. The working circuit is effectively controlled. If the working circuit is running at this time, it will lead to unpredictable dangerous accidents.

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