An electronic intermediate relay

Abstract

An electronic intermediate relay belongs to the relay technical field, and comprises a trigger signal input end and contact points driven by a trigger signal to move; the features are that a plurality of contact points are set, wherein each set comprises a normally open contact point and a normally closed contact point; the normally open / closed contact point respectively comprise a controllable power electronic device (with a control end) or / and circuit, and comprise a normally open contact point control module and a normally closed contact point control module; the trigger signal input end is simultaneously connected with input ends of the normally open contact point control module and the normally closed contact point control module; output ends of the normally open contact point control module and the normally closed contact point control module are respectively connected with control ends of the normally open contact point and normally closed contact point. The electronic intermediate relay uses the electronic circuit to realize contact points, and the contact points simultaneously comprise the normally open contact point and normally closed contact point.

Description

technical field [0001] An electronic intermediate relay belongs to the technical field of relays. Background technique [0002] The intermediate relay is a commonly used electrical component in the industrial field. Its main function is to increase the number and capacity of contacts in the relay protection and automatic control system, and to transmit intermediate signals in the control circuit. In the prior art, the intermediate relays are generally conventional mechanical structures, which are mainly composed of fixed iron core, moving iron core, spring, moving contact, static contact, coil, terminal and shell, etc. The main working principle is as follows: : When a voltage is applied to the relay coil and is equal to or greater than the operating voltage, the armature is attracted by the electromagnetic force against the iron core, and the contact piece is pushed by the top plate of the armature, and the contact is connected, disconnected or converted to the controlled c...

AI Technical Summary

Problems solved by technology

However, the "electronic switch" products in the prior art generally have the following defects: the existing "electronic switch" products generally only have one (or one set) of normally open contacts, that is, when the voltage at the input terminal reaches the trigger condition, The switching state of its output terminal changes from the on state to the closed state, so it cannot be used under the working conditions that require normally closed contacts

At the same time, the existing "electronic switch" products have a large volume because they have to carry a large passing current. Even if they do not need normally closed contacts, they cannot replace conventional mechanical intermediate relays.

Images