What is the difference between an AC contactor and a DC contactor?

Contactor or direct current means that the main power circuit of the contactor is used for alternating current circuit or direct current circuit.
1) The appearance of DC contactor and AC contactor.
2) Countermeasures for overvoltage and arc extinguishing of the contactor.
For AC circuits, when the contactor is disconnected, the overvoltage caused by the power circuit is small. At the same time, when the communication AC arc zero rest day crosses zero, the arc is extinguished, and re-ignites after zero, and the communication AC arc is relatively easy to extinguish.
For DC circuits, when the contactor is disconnected, the overvoltage caused by the power supply circuit is high, and the arc is not easily extinguished.
It can be seen that compared with DC contactors, the arc extinguishing countermeasures of communication contactors are relatively simple.
2) Countermeasures for overvoltage and arc extinguishing of the contactor.
For AC circuits, when the contactor is disconnected, the overvoltage caused by the power circuit is small. At the same time, when the communication AC arc zero rest day crosses zero, the arc is extinguished, and re-ignites after zero, and the communication AC arc is relatively easy to extinguish.
For DC circuits, when the contactor is disconnected, the overvoltage caused by the power supply circuit is high, and the arc is not easily extinguished.
It can be seen that compared with DC contactors, the arc extinguishing countermeasures of communication contactors are relatively simple.
5) The iron core and flow coil of the contactor.
The power absorption project between the contactor iron core and the synchronous motor is: φ here is the magnetic flux of the iron core, and S is the total area of ​​the iron core end. When we replace it, everyone will find that the iron core driven by communication will return when the magnetic force is zero due to the subsidence of the adsorption force and the effect of the axial force torsion spring, and then digested and absorbed again after zero, thereby causing vibration.