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High frequency transformer future development direction?
Mar 14, 2018

         High frequency transformer future development direction?

High-frequency transformers are more and more widely used in the industry. In recent years, high-frequency transformers have been developing rapidly. So what direction did he go to develop? At present, it is recognized that high-frequency transformers are developing in the direction of high frequency. So what is high frequency? What is the frequency to achieve in the general sense of the high frequency? And high-frequency transformers can be applied to those areas? The following is a detailed explanation and analysis for everyone by Xiao Bian. Please see the specific analysis below.

There are two main concepts of high-frequency electronic transformers, one is "electronics", which is different from power transformers and RF signal transformers. According to the field of switching power converters that I am engaged in, "electronics" should be referred to here as "power electronics" (Power Electronics). The second is “high frequency.” Traditionally, high frequencies above 20 kHz are high frequencies, but at present, the understanding of high frequencies in different fields may be different. For small power (tens to hundreds of watts) converters, several hundred kilohertz before, it is considered high frequency, and high power (hundreds of watts to several kilowatts), tens of thousands of kilohertz calculated high frequency, high Power frequency conversion, tens of kilohertz is high frequency. But no matter what, high-frequency electronic transformers should be referred to as “power transformers that use switching power conversion circuits with frequency ranges from a few tens of kHz to several megahertz. Their operating frequency ranges are less than frequency and radio frequency, and they are used in switching power converters. Power and radio transformers, which are energy transfer, differ in the signal processing of the transformer.

In short, current high-frequency electronic transformers develop in the high frequency direction, namely high power density and low plane. High power density is the need for market development, and high frequency is the most effective way to increase power density. With the development of high frequency magnetic materials, high frequency transformers have also been created. At high frequencies, the key to improving the power density of a transformer is the design of the transformer design technology. Because high frequency, eddy current losses become very important, traditional design methods cannot meet the requirements of high frequency, so the design of the core and winding becomes more and more important. The requirements of low planar transformers make PCB coils widely used, but the design of transformers brings new levels of difficulty, especially transformer air gaps such as flyback transformers, harmonic transformers, and PFC inductors. In short, the development of high-frequency, low-side and new design technologies for electronic transformers.

At present, high-frequency transformers are mainly used in the field of high-frequency power conversion. In general, electronic transformers are directed toward high frequency, planarity, integration, modularity, arrays, hybrid directions and the consequent new analytical methods, such as electromagnetic field analysis methods and new technology designs, such as optimized design, multi-domain Comprehensive design, and new manufacturing techniques challenge traditional processes. Due to the development of frequency and magnetic materials, many semiconductor processing techniques can be applied in the manufacture of high frequency transformers, or transformers are not a discrete device, and it can be incorporated as a power converter with thick and thin film technology. In the case of low power, this trend has become very clear. The above is a small series of summaries of principles and differences between ICT testers and FCT functional tests. It is mainly for everyone to use, in principle, and what can be done to test several aspects of the test for everyone to make the difference.

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