Matrix Transformers May Find New Life In the SiC and GaN Era

Focus:

Many said that matrix transformers were ahead of their time. When they were introduced in 1989, their ability to operate at high frequencies of 300 kHz and above was not especially valued since few power converters were operating in that frequency range. But today, power converters are operating at even higher frequencies with GaN and SiC power devices promising to take switching frequencies higher still. So, in this article, the author reintroduces the matrix transformer, encouraging its use in new designs. He starts by noting the relevant patents (which have expired), explains the different forms of the matrix transformer and their key characteristics, and cites new research that helps explain why their core losses have tended to be lower than expected. The author recounts his experience in designing matrix transformers and their commercial history, offering some lessons learned. He also references online seminar materials that provide more detailed instructions on how to design these components.

What you’ll learn:

• How to understand the characteristics and advantages of matrix transformers

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Author & Publication:

Edward Herbert, Power Sources Manufacturers Association (PSMA) Magnetics Committee, How2Power Today, Dec 16 2013

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