Electromagnetic valve: Solenoid valve coil is an important part of solenoid valve, used to generate electromagnetic force, and control the opening and closing of the valve. Solenoid valve coil is usually made of wire wound, the current through the coil, will produce a magnetic field, the magnetic field under the action of the coil will produce electromagnetic force, so that the valve open or close. The solenoid coil structure is generally composed of an iron core and a coil. Iron cores are usually made of permeable materials that enhance the generation and conduction of magnetic fields. The coil is wound by insulated wire, usually copper or aluminum wire, by winding the way to increase the number of turns of the coil, thereby enhancing the generation of electromagnetic force. The working principle of the solenoid coil is based on Ampere's law and Faraday's law of electromagnetic induction. When the current through the coil changes, a changing magnetic field will…