Briefly describe the structure of time relay
I have also seen a small motor control, as well as washing machines, electric fans are controlled by the winding and gossamer.
With the popularity of single-chip, the current manufacturers have adopted single-chip as the core of the relay device, and product controllability and timing accuracy can be adjusted by the software, so the future time relay will be completely replaced by the microcontroller.
Early in the AC circuit often used in the air damping type time relay, which is the use of air through the small hole throttling
The principle to get the delay action. It consists of electromagnetic system, delay mechanism and contact three parts. Any relay that senses the component to an action signal, its actuator (contact) to delay a certain time before the action of the relay called the time relay.
At present the most commonly used for large-scale integrated circuit type of time relay, it is the use of resistance to the principle of delay to achieve action. In the AC circuit is often used to step down the transformer, integrated circuit as a core device, the output using a small electromagnetic relay, making the product performance and reliability than the early air damping time relay is much better, the product timing accuracy and Control also increased a lot.
