The method of construction is properly installed power supply filter
Release time:
Nov 23,2022
Therefore, in the actual project, without exception, to see the ground terminal sine wave filters are attached to a ground wire. But why linking this line, but few people know.
There is a ground terminal on the filter housing, which virtually remind users: filter needs grounding. Therefore, in the actual project, without exception, to see the ground terminal sine wave filters are attached to a ground wire. But why linking this line, but few people know.
Ground terminal of the filter is what role? : In the basic circuit of the power line filter, common mode filter capacitor connected at one end to be filtered on the wire (line and neutral), and the other end connected to the ground. For the filter, the filter housing is the ground, and the ground terminal of the filter is the filter housing. In principle the filter, we know, common mode filter capacitor ground terminal to be connected to the shield enclosure or a large metal plate. Therefore, the ground terminal is to allow you to connect the filter to the chassis or a large metal plate.
Ground terminal useful practice it? : In the discussion on the capacitor, we have seen that even a very short lead will have a significant impact on a bypass capacitor, so in the production of electromagnetic interference filter, to leave no stone unturned to shorten lead capacitance ( even the use of three-terminal capacitor or feedthrough capacitors). Through this filter ground terminal, equivalent to extend the common mode filter capacitor lead length. The actual situation shows that the length of the ground wire has already greatly exceeded the tolerable level. Therefore, these ground terminals are usually useless (unless a very short, very thick ground wire). On the contrary, there is a bad role, which is to mislead you through it with a long wire to ground.
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