Does the abnormal sound of relay affect the car?

The abnormal sound of the relay has an influence on the car. A click indicates that the motor can be started. Check whether the battery supplies power first, and then check whether it supplies oil.

Relay (English name: relay) is an electrical control device. When the change of input (excitation) meets the specified requirements, the controlled quantity changes in the electrical output circuit in a predetermined step. It has the interactive relationship between the control system (also called input loop) and the controlled system (also called output loop).

Usually used in automatic control circuits, it is actually an "automatic switch" that uses small current to control large current. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit.

In the18th century, scientists also thought that electricity and magnetism were two completely unrelated physical phenomena. After the Danish physicist Oster discovered the magnetic effect of current in 1820, the British physicist Faraday discovered the electromagnetic induction phenomenon in 183 1 year. These findings confirmed that electric energy and magnetic energy can be transformed into each other, which also laid the foundation for the birth of electric motors and generators later. Because of these inventions, mankind has entered the electrical age.

In 1930s, joseph henry, an American physicist, invented the relay by electromagnetic induction while studying circuit control. The earliest relay is electromagnetic relay, which uses the phenomenon of electromagnet's emergence and disappearance when it is powered on and off to control the on-off of another circuit. The voltage of the circuit is high and the current is large. Its appearance makes the remote control and protection of the circuit go smoothly. Relay is a great invention in the history of human science and technology. It is not only the foundation of electrical engineering, but also the important foundation of electronic technology and microelectronics technology.

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.

Relays generally have an induction mechanism (input part), which can reflect some input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light and so on). ); There is an actuator (output part) which can control the on-off of the controlled circuit; Between the input part and the output part of the relay, there is also an intermediate mechanism (driving part) for coupling and isolating the input quantity, processing the function and driving the output part.