Solenoid valves use electromagnets to move a plunger attached to the valve to open or close it. Cutting the power to the electromagnet allows a spring or other force to return the plunger to its original position. Automatic irrigation systems often use solenoid valves to control water delivery.Know More
The electromagnet is a coil of wire. Moving electricity establishes a magnetic field. In the valves used for automated sprinklers, water pressure from the line presses a diaphragm to keep the valve closed. When the electrical impulse moves the plunger, it opens a small hole that allows the water pressure to drain, and pressure from the opposite side moves the diaphragm up to open the main valve to the sprinklers. As long as the small port is open, water continues to flow to the system.
Removing power from the electromagnet closes the port, and the diaphragm fills with water again. Once the pressure behind the diaphragm reaches the critical point, the water pressure forces the valve to close again and the sprinklers stop spraying water.
In the normally closed solenoid valve, the valve remains closed unless the magnet receives power. For some applications, a normally open valve is a better fit. In these solenoid valves, applying power closes the valve.Learn more about Electricity
The solenoid valve of a humidifier is found in the water supply line and is the component that controls the flow of water to the main body of the humidifier. "Solenoid" is a generic term for a device or component that uses energy to create linear motion.Full Answer >
A generator works by converting mechanical energy supplied by an engine into electrical energy, using the principles of Faraday's law of magnetic induction. Magnetic induction is caused by moving a magnet near a conductor, such as coils of copper wire. This movement of the magnet creates an electrical current by inducing a voltage difference, which acts as pressure on the electrons and drives them to flow through a circuit.Full Answer >
Capacitors work by accumulating charge at the surface of two electrical conductors separated by an insulator in the presence of an electric potential. The positive capacitor plate accumulates positive charges, while the negative plate accumulates negative chargesFull Answer >
Dynamos produce electric current by rotating a wire within a magnetic field. Another method rotates a permanent magnet around coils of wire. Both processes produce alternating current because the wire passes between two magnetic poles every half turn. A commutator can turn the alternating current into direct current pulses, a common practice in early days before alternating current became the standard.Full Answer >