Electromagnet in practice - lock and relay
Relay is an electrical component that contains electromagnetically operated switch. It was invented in 1835 by Joseph Henry.
Educational phase: motivation
- two different relays
- door lock
- connecting wires
The electromagnetic relay consists of a control circuit with the coil circuit and controlled. With the control circuit can be switched or circuit interrupt driven. Coil and armature core are magnetically soft steel. Closes the control circuit, a current begins to coil, it becomes a magnet and attract anchor. End anchor themselves to the flexible tongues pressed switch circuit controlled and managed through the circuit starts to flow. The current control circuit in just a little while in a controlled current circuit can be considerable.
Application in practice
important part of safety equipment for railways, operating heavy equipment - motors, etc.