Structural characteristics of the solenoid valve
Each type of solenoid has its own characteristics, the most important of which is its attractive characteristics. Next, we will compare them based on their different structures and attractive characteristics.
The armature of the solenoid bears two suction forces. The superimposed synthetic suction force makes the suction force of the solenoid valve in the air gap still very large, which is suitable for solenoid valves with large strokes.
Baffle solenoids are characterized in that the armature rotates around a fulcrum, and its rotation angle is usually less than 15 degrees. Due to its simplicity, it is one of the most widely used structures in many modern AC and DC electrical equipment and contactor magnetic systems. The attraction characteristic of the baffle solenoid is close to a hyperbola, but it usually varies with the type of solenoid power supply.
Type III solenoids are divided into two types: direct-acting and rotary. Compared with a plug-in solenoid, this solenoid has three armature legs, and the coil is located on the middle armature leg. If the total cross-sectional area of the two Type III armature columns on both sides is equal to the cross-sectional area of the middle armature column, and the cross-sectional area of each armature column of the plug-in solenoid is equal to the suction position, the type III solenoid The torque of the middle armature column is greater than that of the plug-in solenoid.
How to increase electromagnetic attraction
When the size of the solenoid valve is allowed, our Solenoid Valve Manufacturer needs to choose an armature core with a large cross-section. A large cross-section armature core has a larger magnetic flux, which may produce a larger electromagnetic attraction.
Within the allowable range of the armature core stroke, our Solenoid Valve Factory needs to reduce the length of the air gap. Since the magnetic resistance in the air is large, reducing the length of the air gap in the armature core can reduce the magnetic resistance, thereby making the magnetism stronger.
The size of the magnetic flux is related to the product of the number of coil turns and the current flowing through the coil. We usually refer to multiplying ampere-turns as "ampere-turns". When the armature core is fixed, the more ampere-turns of the coil, the stronger the suction force of the solenoid. When determining the size of the solenoid valve, the size of the solenoid coil is limited. In order to obtain the strongest electromagnetic attraction force within a limited range, the number of coil turns or wire diameter must have an optimal value to obtain the maximum amperage. Therefore, in order to achieve the strongest electromagnetic attraction, we need to increase the number of coil turns and reduce the wire diameter or vice versa. In any case, we should consider the maximum number of ampere-turns.
