During the research and development of new products of wall plug in adapter
, it is necessary to consider the problems of product packaging, circuit design, heat dissipation design, and anti-electromagnetic interference comprehensively, and insulation cover design is also a very important design link. This paper will briefly analyze the insulation screen technologies of the power adapter and fully understand the key points of insulation design of the adapter.
In the process of wall plug in adapter
working, sometimes the circuit surge will be higher than the risk voltage. In order to ensure the normal operation of the circuit, it is necessary to take appropriate insulation technologies. In general, common insulation technologies are generally divided into the following types:
The first kind: additional insulation technology
So-called additional insulation technology, which is added independently to the base insulation, can guarantee the occasional effectiveness of the base insulation and provide secondary protection against electric shocks. However, it should be noted that the minimum thickness of the additional insulation monolayer material must be greater than or equal to 0.4mm in order to effectively provide protection.
The 2nd kind: strengthen insulation technology
This technique is one of many insulating systems to avoid electric shock, which is functionally equivalent to double insulation. When using reinforced insulation technology for circuit design, the minimum thickness of a single layer used inside is greater than or equal to 0.4mm, so that several layers of insulation can be guaranteed, but each layer cannot be tested alone.
Third: basic insulation
This technique is the most basic way to insulate a power adapter from an electric shock, and it's the one that's clearly introduced in the textbook. However, the base insulation alone is not absolutely safe. Engineers also need to reach the safety requirements through additional insulation and secondary shield grounding, such as the insulation between the coil layers.