Mechatronic compound relay

Abstract

A mechanical electric compound relay includes an input joint, a first relay, a power switch tube and an output joint connected in sequence in series; the compound relay also includes a second relay; the contact points of the second relay are respectively connected with the input joint and the output joint; the power switch tube is taken as a switch to connect through and cut off a circuit in the compound relay and can eliminate a voltaic arc; the first relay plays the role of connecting through when being electrified and isolating action when being cut off; the second relay is connected in parallel with the first relay and the power switch tube connected in series; after the circuit is connected through, the second relay is then connected through to bear a current load; the power switch tube almost has no current load; therefore, the power switch tube almost can not heat.

Description

Mechatronic Composite Relay 【Technical field】 The invention relates to a relay for connecting and disconnecting circuits, in particular to a mechatronic composite relay. 【Background technique】 Relays or contactors are the most widely used circuit devices at present, and they play the role of connecting and disconnecting in AC and DC circuits. The AC current has alternating characteristics, the current must cross zero every cycle, and has a natural arc extinguishing effect, so most of the general AC relays are used, but when the AC wave is turned off at the highest point, the current is the largest, and the discharge arc phenomenon will occur. The DC current is continuous, and it is easier to generate an arc if it is broken by a mechanical contact switch. The arc is the main factor affecting the life of the relay. In the prior art, in order to extinguish the arc, the mechanical contact type DC relay is made bulky and consumes a lot of power. The use of auxiliary means su...

AI Technical Summary

Problems solved by technology

However, all electronic switches have internal resistance, which will generate heat when under load. It is necessary to configure a large heat sink and choose a larger overheating insurance factor, which obviously increases the manufacturing cost.

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