发布日期：2018-01-19 作者：贵州开关柜 点击：
What will the mine switch cabinet be disturbed?
With the development of modern technology, most of the equipment we use will use electric power, and mine production is no exception, so special mine switch cabinet will be equipped. But in the actual production process, the mine switch cabinet is easy to be subjected to electromagnetic drying, how to prevent this kind of problem?
For example, through instant guide in the mine switch cabinet, transformer primary coil will produce large inrush current, and voltage surge peak high in both ends of the primary coil; and in the switch off instantly, because of leakage flux of the primary coil, resulting in a part of the energy from a coil transmission to the two coil. Stored in the leakage inductance in this part of the energy and the switch itself inter electrode capacitance and resistance formed with peak attenuation oscillation.
Sometimes when the output diode of a switchgear is in positive conduction, the charge inside the PN is accumulated。 The charge accumulated on the diode plus reverse voltage will disappear and generate a reverse current。 Due to the high frequency of the switch conversion in the two rectifying circuit, a surge of the reverse current is generated in a short time。
The Guiyang switch cabinet reminds the disturbance caused by the surge due to the existence of the distributed capacitance and the distributed inductance in the DC output. In this way, the high frequency switch current loop composed of the high frequency transformer primary coil, the switch tube and the filter capacitor of the mine switchgear may generate larger space radiation and form radiation interference.
When it is superimposed on the switch off voltage of the mine switchgear, it will form a spike voltage, which will transmit to the input and output terminals, and form a conduction interference, which will have a great impact on the normal operation of the mining switchgear.