Description of the classification and classification of solenoid valve coils

1. According to the winding method of the electromagnetic coil
(1) "I" type coil
The coil is wound around the stationary core and the moving armature. When current is passed through the coil, a magnetic field is generated and the moving armature attracts the stationary core. This force is used to move the mechanical portion of the solenoid valve and open and close the valve seat alternately.
(2) "T" type coil
The "T" type electromagnetic coil is wound around an "E" shaped static iron core. When the coil is excited, it can generate a large attractive force and pull the movable armature toward the stationary iron core.

2. Classification by current characteristics of the coil
(1) DC coil
In the DC coil, only the resistance portion of the coil resistance needs to be considered. We know that the current I = V / R, and for DC, the voltage (V) and the resistance (R) are constant, so the current (I) is equal to a constant.
DC coil current characteristics
(2) AC coil
In the AC coil, the magnetic permeability changes abruptly with the position of the armature. Initially, at the maximum air gap, the magnetic force and the inductive reactance are very low, which means that a large current is charged by the human coil. This initial high current makes the AC coil react more strongly than the DC coil. When the armature closes the air gap, the magnetic permeability increases while maintaining the coil at a constant current, and the attractive force of the coil tends to be stable.