0200 drain valve/air compressor/pulse valve solenoid coil

Inductance introduction

1. The reactance of the coil of DC relay is large and the current is small. If it is said that it will not be damaged when connected to alternating current, it will be released when it is timely. However, the reactance of the coil of AC relay is small, and the current is large. Connecting DC will damage the coil.

2. There will be a short circuit ring on the iron core of AC contactor, but not DC contactor. The wire diameter of DC coil is thin, because its current is equal to U/R, and it does not change. The wire diameter of AC coil is thick, because the coil has inductance, and the current changes greatly before and after the armature is attracted. If the armature is stuck and does not attract, it will burn the coil. The iron core of AC coil must use silicon steel sheet, and the iron core of DC coil can use the whole iron block.

3. The attraction and current of AC electromagnet are changing, both of which are larger at the beginning of the attraction, but smaller after the attraction. However, the attraction and current of DC electromagnet remain unchanged during the whole process of attracting and holding.

4. AC coils are not graded, while DC coils are mostly polarized. Their working principles are basically the same. They all generate a magnetic field in the coil to cause the next action. The difference is that AC coils generate an alternating magnetic field, which is greatly influenced by voltage and current, while DC coils are more stable and have higher safety factor, which is more suitable for instantaneous working environment.

In fact, the wireless charging coil has higher inductance and smaller leakage inductance, and its service life is longer than the general inductance. I believe everyone knows that six months is the term of inductance, but the wireless charging coil depends on the manufacturing process and storage environment. The wireless charging coil has passed the anti-oxidation treatment and salt spray test before leaving the factory to ensure the excellent weldability of the product. Every small packaging bag and inner box are sealed and placed with desiccant, so the storage period can be extended to eight months. Moreover, the ferrite material has been sintered at a high temperature of more than 1000 degrees, so it has high strength and can be permanently guaranteed.