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Discussion on the future development direction of high-frequency transformers?

View: 26211/26/2019  

As a more common and popular electronic component, high-frequency transformers are seen more in electronic products. Today, I saw some people asking why they use high-frequency transformers on the Internet. Therefore, Southern Electrical Components collected and summarized for everyone. Share some questions on this.


  High-frequency transformers are used more and more widely in the industry now. In recent years, high-frequency transformers have developed rapidly. So what direction does he develop in? At present, it is recognized that high-frequency transformers are developing in the high-frequency direction. So what is high frequency? What is the high frequency in general? And in which fields can high-frequency transformers be specifically applied? The following is a specific explanation and analysis by everyone. Please see the specific analysis below.


What are the two concepts of high-frequency transformers?


  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 I work in, "electronics" should mean "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 converters with low power (tens to hundreds of watts), before a few hundred kilohertz, it was considered high frequency, and high power (several hundreds to several kilowatts), high frequency calculated at tens of thousands of kHz, Power frequency conversion, tens of kHz is high frequency. But no matter what, high-frequency electronic transformers should mean "power transformers that use switching power conversion circuits with a frequency range from tens of kHz to several megahertz, whose operating frequency range is less than frequency and radio frequency. Power and radio transformers are energy transfers, and the signal processing in the transformer is different.



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Second, the future development direction of high-frequency transformers?


  All in all, the current high-frequency electronic transformers are developing in the high-frequency direction, that is, high power density and low plane. High power density is a requirement of market development, and high frequency is the most effective way to improve power density. With the development of high-frequency magnetic materials, the situation of high-frequency transformers has also been created. At high frequencies, the key to improving the power density of a transformer is the design of the transformer design technology. As high frequency and eddy current losses become very important, traditional design methods cannot meet the requirements of high frequency, so the core and winding of the design become more and more important. The requirements of low-plane transformers make PCB coils widely used, but the design of transformers brings new levels of difficulty, especially the air gap of transformers, such as flyback transformers, harmonic transformers, and PFC inductors. In short, the development of high-frequency, low-profile and new design technologies for electronic transformers.


Third, the application field of high-frequency transformer?


  Today, high-frequency transformers are mainly used in the field of high-frequency power conversion. Generally speaking, electronic transformers are oriented towards high-frequency, planar, integrated, fast-mode, array, mixed directions, and new analytical methods that follow, such as electromagnetic field analysis methods and the design of new technologies, such as optimal design. Comprehensive design, and new manufacturing technologies challenge traditional craftsmanship. Due to the development of frequency and magnetic materials, many semiconductor processing technologies can be applied in the manufacture of high-frequency transformers, or the transformer is not a discrete device, which can be incorporated into the power converter through thick and thin-film technology as one. With low power, this trend is already very obvious. The above is a summary of the principles and a small series of 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 a difference.


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