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All colleagues unite and focus their efforts to write a new chapter of developmentPower adapter manufacturer: Three key considerations for power adapter insulation.
所属分类： Industry News
发布时间：2020-06-18
Many people have heard that, during the development of new switching‑mode power adapter products, it is essential not only to comprehensively address issues such as package design, circuit design, thermal management, and electromagnetic interference (EMI) protection, but also to give due attention to insulation‑protection design, which is equally critical. This article provides a brief analysis of insulation‑protection design, helping engineers gain a thorough understanding of its key considerations. During operation, power adapters may occasionally experience transient overvoltages within the circuit; to ensure reliable performance, appropriate insulation‑protection measures must be implemented. Below…
Power adapter manufacturer Let’s take a closer look at the three key aspects of insulation in power adapters. In general, the most common insulation protection techniques can be categorized into the following types:
First, one of the most common insulation techniques is reinforced insulation. This method is among the many insulation systems designed to prevent electric shock and is functionally equivalent to double insulation. When designing circuits with reinforced insulation, the minimum thickness of the single layer used must be at least 0.4 mm, providing multiple layers of insulation for added safety; however, each individual layer cannot be tested separately.
Furthermore, a common insulation method in China is basic insulation. This technique aims to prevent…
Switching power adapter The most fundamental method of electrical insulation, which is also the insulation technique most clearly described in current textbooks, will not be elaborated upon further here. However, basic insulation alone does not ensure absolute safety; engineers must also employ supplementary insulation and protective grounding as secondary safeguards to meet safety requirements, such as interlayer insulation in windings.
Different types of circuits require different types of insulation:
1. This type of equipment employs protective grounding, whereby the metal enclosure is connected to the protective earth, serving as a Class I protective measure. Between any hazardous‑voltage components and the enclosure, only basic insulation is required, such as in station communication power supplies.
2. Employing double insulation and reinforced insulation, with no metal enclosure or grounding screws, such as portable chargers.
3. Powered by a SELV source and an external power supply that does not generate potentially hazardous voltages, it therefore requires only basic insulation, such as in the case of board‑mounted power supplies.