What is the function of the relay coil? We should all know the function of the relay. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, resulting in an electromagnetic effect, and the armature will be attracted by the electromagnetic force. Under the action, it overcomes the pulling force of the return spring and attracts to the iron core, thereby driving the movable contact of the armature and the static contact (normally open contact) to attract. The function of the coil is to make the upper coil charged to adsorb or pop the relevant contact points through the input voltage, so as to realize the function of mechanically opening/breaking another group of circuits, so as to achieve the desired output. Therefore, the coil is the main component of the relay, which plays a To convert electrical energy into mechanical energy to achieve control.

A relay is a device that is often used as a switch in a circuit. According to the type of control voltage required by its coil, it can be divided into AC relay and DC relay. The specifications of the relay are represented by the coil control voltage and the contact current. Usually, when the load current is less than 10A, the contact of the relay can be directly used to connect or disconnect the circuit. If the load current is too large, it can be used as an indirect control device.

In the central air-conditioning control system, relays are often used as switches for power circuits such as compressors, fan motors, water pumps, and four-way valves. When in use, one end of the relay control coil is connected to the power supply, and the other end is connected to the output end of the control component. Through the output control signal of the control component, the two ends of the relay control coil generate a potential difference and form a current loop to generate electromagnetic force. Under the action of the electromagnetic force and the inherent elastic force of the relay reed, the contacts of the relay are pulled in or released, so as to connect or disconnect the circuit of the electrical load power supply to control the operation or stop of the related equipment.

main function:

　　The principle of electromagnetism is used to convert electrical energy into mechanical energy to achieve control. The coil and the armature inserted into the coil form an electromagnet. The magnetic force generated by the coil energization will make the armature move mechanically, driving the contacts to complete or disconnect the circuit. work to achieve the desired output, so the coil is the main component of the relay. Since the current passing through the coil is very small, the current or voltage controlled by the contact is relatively high. Therefore, a small current or small voltage can be used to control large current and high voltage. voltage purpose.

　　When the relay coil is powered off, the electromagnetic suction also disappears, and the armature will return to the original position under the reaction force of the spring, so that the moving contact and the original static contact (normally closed contact) are attracted. In this way, the suction and release are achieved, so as to achieve the purpose of conducting and cutting off in the circuit. For the "normally open and normally closed" contacts of the relay, it can be distinguished as follows: the static contacts that are in the open state when the relay coil is not energized are called "normally open contacts"; the static contacts that are in the connected state are called "normally open contacts". It is a "normally closed contact".

We all know the functions of relays and coils. In simple terms, the relay coil is an important part of the relay. Coils are required for the adsorption and opening of the relay. In order for the relay to function, it must be used in conjunction with the coil. What is the function of the relay coil? The content is here. Our company is a professional relay manufacturer. If you want to know more about relays, please pay attention to Gordon relays.