Method for improving arc extinguishing efficiency of multi-cavity structure by using magnetic field

The invention relates to the technical field of overvoltage protection devices, in particular to a method for improving the arc extinguishing efficiency of a multi-cavity structure by using a magnetic field, which can improve the performance of the multi-cavity arc extinguishing structure. According to the method for improving the arc extinguishing efficiency of the multi-cavity structure by using the magnetic field, when the multi-cavity structure is broken down to generate the arc, movement of the arc plasma in the structure can be further accelerated, the arc ejection and extinguishing time is shortened, and the arc extinguishing efficiency is improved. A non-constant magnetic field is arranged on the basis of an original chamber structure, the magnetic induction intensity of the magnetic field is 0.15 T, and the direction of the magnetic field is perpendicular to the central axis between electrodes in an arc extinguishing chamber unit and the central axis of a chamber nozzle. Through the magnetic field, o