Working principle and application of Omron relay

Working principle

When a certain voltage is added to both ends of the coil, a certain current will flow through the coil, resulting in electromagnetic effect. Under the action of electromagnetic force attraction, the armature will overcome the tension of the return spring and draw towards the core, thus driving the armature's moving contact and static contact (normally open contact) to draw.

When the coil is powered off, the electromagnetic suction also disappears, and the armature will return to its original position in the spring's reaction force, so that the moving contact and the original static contact (normally closed contact) release. This suction, release, so as to achieve the purpose of conduction in the circuit, cut off.

For the "normally open, normally closed" contact of the relay, can be distinguished in this way: the relay coil is not energized when the static contact is disconnected, called "normally open contact"; A static contact in the switched state is called a "normally closed contact".

use

1. Expand the control range: for example, when the control signal of the multi-contact relay reaches a certain value, it can change, break and connect the multi-circuit at the same time according to the different forms of the contact group.

2. Amplification: For example, sensitive relay, intermediate relay, etc., with a very small control amount, can control a large power circuit.

3. Integrated signal: For example, when multiple control signals are input into multi-winding relays in the prescribed form, the predetermined control effect can be achieved through comparative synthesis.

4. Automatic, remote control, monitoring: for example, the relay on the automatic device, together with other electrical appliances, can form a program control line, so as to achieve automatic operation.