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What are the main functions of relays

 Back to list Source: Heju hardware Browse: - Release date: November 18, 2020【 large in Small
What is? relay And what the relay does.
 
Relay (English Name: Relay) is a kind of electrical control device. When the change of input quantity (excitation quantity) reaches the specified requirements, the controlled quantity will change step by step in the electrical output circuit. It has the interaction between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuit, it is a kind of "automatic switch" which uses small current to control large current operation. Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit.
 
Main functions of relay
 
Relay is an automatic switching element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control elements.
 
The relay generally has the induction mechanism (input part) which can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); there is an actuator (output part) that can realize "on" and "off" control of the controlled circuit; between the input part and the output part of the relay, there are coupling and isolation of the input quantity, and the function is also provided The intermediate mechanism (driving part) is used to drive the output part.
 
As a control element, the relay has the following functions:
Expand the control range: for example, when the control signal of multi-contact relay reaches a certain value, the multi-channel circuit can be changed, disconnected and connected according to different forms of contact groups.
Amplification: for example, sensitive relay, intermediate relay, with a very small amount of control, can control a high power circuit.
Integrated signal: for example, when multiple control signals are input into multi winding relay according to the specified form, the predetermined control effect is achieved through comparative synthesis.
Automatic, remote control, monitoring: for example, the relay on the automatic device, together with other electrical appliances, can form a program control circuit to realize automatic operation.
 Relay accessories
This article is from the official website of Heju http://www.hejujingmi.com

 
 

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