Post by khatunejannat on Feb 15, 2024 3:05:19 GMT -5
In this SEAS blog post, we are going to try to explain what a relay is and what they are for. We will also talk about the different types of existing relays . Basically we could define the relay as an electrical switch that allows the passage of electric current when it is closed and interrupts it when it is open, but that is operated electrically, not manually. The relay is made up of a coil connected to a current. When the coil is activated, it produces an electromagnetic field that causes the normally open relay contact to close and allows current to pass through a circuit to, for example, turn on a lamp or start a motor. When we stop supplying current to the coil, the electromagnetic field disappears and the relay contact opens again, leaving the electrical circuit that went to that lamp or motor without current.
SEAS Electricity and Electronics Courses What are relays used for? The relays serve to activate a circuit that has a considerable Turks and Caicos Islands Email List consumption of electricity through a small power circuit - 12 or 24 volts - that magnetizes the coil. Suppose we want to motorize a garage door or the entrance to a property. To do this we will need a remote control that can activate, through a receiver, that small power charge that starts the relay working: the coil will become magnetized and close the electrical circuit that powers the motor that is used to open the door. We can also use it to start machines and motors, lighting systems, etc. Sometimes, we find lighting circuits that require great power for their operation. By activating and deactivating them indirectly, through the use of relays that operate with little power, we prevent possible risks and accidents. In the automotive industry, relays are also widely used to activate fans, windshield wipers, horns, window regulators, etc.
The turn signal relay allows the light to flash when activated and to emit the characteristic sound when on. Relay types There are different types of relays: Electromechanical relays that have variants depending on the activation mechanism. They can be armature , moving core , reed or reed type, polarized relays or three-pole relays . Solid state relays , which are used in situations where there is continuous use of the relay contacts and a higher switching speed is required. AC relays . Timer or delayed action relay. With these relays, connection or disconnection is achieved after a certain time. Thermal relays . They are used to protect motors from overloads. They have metal sheets inside that deform more or less depending on the heat. If they reach a certain deformation point because the heat of the motor has increased, they open the circuit and do not allow the current to pass. Arduino relay. With an Arduino board we can control a relay. We just have to connect the relay to one of the 5 volt pins that this board has. By programming the board we can obtain interesting results to control lighting and motor switching.
SEAS Electricity and Electronics Courses What are relays used for? The relays serve to activate a circuit that has a considerable Turks and Caicos Islands Email List consumption of electricity through a small power circuit - 12 or 24 volts - that magnetizes the coil. Suppose we want to motorize a garage door or the entrance to a property. To do this we will need a remote control that can activate, through a receiver, that small power charge that starts the relay working: the coil will become magnetized and close the electrical circuit that powers the motor that is used to open the door. We can also use it to start machines and motors, lighting systems, etc. Sometimes, we find lighting circuits that require great power for their operation. By activating and deactivating them indirectly, through the use of relays that operate with little power, we prevent possible risks and accidents. In the automotive industry, relays are also widely used to activate fans, windshield wipers, horns, window regulators, etc.
The turn signal relay allows the light to flash when activated and to emit the characteristic sound when on. Relay types There are different types of relays: Electromechanical relays that have variants depending on the activation mechanism. They can be armature , moving core , reed or reed type, polarized relays or three-pole relays . Solid state relays , which are used in situations where there is continuous use of the relay contacts and a higher switching speed is required. AC relays . Timer or delayed action relay. With these relays, connection or disconnection is achieved after a certain time. Thermal relays . They are used to protect motors from overloads. They have metal sheets inside that deform more or less depending on the heat. If they reach a certain deformation point because the heat of the motor has increased, they open the circuit and do not allow the current to pass. Arduino relay. With an Arduino board we can control a relay. We just have to connect the relay to one of the 5 volt pins that this board has. By programming the board we can obtain interesting results to control lighting and motor switching.