What is a relay

The relay is mainly composed of an electromagnetic system, a contact system, and a release spring. When the relay's input quantity changes, the magnetic field generated by the electromagnetic system will also change, thereby driving the closing and disconnection of the contact system to achieve circuit control. Relays generally have two circuits: the control circuit and the working circuit.

1. Electromagnetic system

The electromagnetic system is the core part of the relay, which mainly includes an Electrician Pure Iron Core, coil, and Relay Coil Yoke. When the coil is energized, a magnetic field is generated, and the magnitude of the magnetic field is proportional to the square of the current. The function of the iron core and iron yoke is to strengthen the magnetic field and improve the relay's action sensitivity.

2. Contact system

The contact system is the executive part of the relay, which mainly includes moving contacts and static contacts. When the magnetic field generated by the electromagnetic system reaches a certain value, the magnetic field force will overcome the elastic force of the release spring, so that the Moving Silver Contact and the Static Silver Contact are closed, thereby realizing the connection of the circuit; when the coil is de-energized, the magnetic field disappears, and the elastic force of the release spring will disconnect the moving contact and the static contact, thereby realizing the disconnection of the circuit.

The static contact in the disconnected state, when the relay coil is not energized, is called a "normally open contact"; the static contact in the connected state is called a "normally closed contact".

3. Release spring

The release of Beryllium Spring for Relay is an important component of the relay. Its function is to keep the contact system disconnected without the action of electromagnetic force. When the coil is energized, the magnetic field force will overcome the elastic force of the release spring and close the contact system; when the coil is de-energized, the magnetic field disappears, and the elastic force of the release spring will disconnect the contact system.

Circuit control and isolation: Hongfa Brand Automotive Relays can realize the switching function of the control circuit, isolate the control part of the circuit from the controlled part, and ensure the safety and reliability of the control signal and the controlled circuit.

Current amplification: Hongfa Brand Signal Relays can control large current loads and realize the amplification of small current control signals, to adapt to different load requirements.

Remote control and automation: China Hongfa Industrial Relays can be used in remote control systems to remotely control the switch of equipment or systems through control signals.

Protection function: It plays a protective role in the circuit, such as overload protection, short circuit protection, etc. Once the circuit load exceeds the set value, the relay can cut off the power supply in time to prevent damage to the circuit and equipment.

Signal conversion and logic control: Different types of Hongfa HVDC Relays can realize complex electrical control functions such as signal conversion, logic control, and timing control.