What many people do not know the working principle of the solenoid is an electromagnetic coil also say confused, here we are saying is, the electromagnetic coil do!
Magnet wire circle moving core, core-coil when the valve is energized, it will be attracted to move, driven spool move, thereby changing valve conducting state. Professionals may have heard of dry or wet, refers only to the working environment of the coil, the valve action, is no different.
But we must know that the coil after coil inductance and hollow core size is added is completely different. Inductance, the former is significantly smaller than the latter.
When the coil of the alternating current coil impedance produced naturally is not the same. For the same coil, at the same frequency alternating current, inductance will change the heart, that is the core of a different impedance change, increasing the current through the coil impedance will be hours.
So what is so clever electromagnetic coil wire and the results? In fact, it is in the presence of the wire through the establishment of the use of the magnetic field, which is spirally wound a strong magnetic field, with a minimum of space, the highest magnetic field strength.