Cutting Power Transformer Size In Half While Doubling Transistor Efficiency: It's All In The Topology

Focus:

This case study reveals the benefits of a nonisolated push-pull topology in which a 1:1 isolation transformer, reconnected as an autotransformer, performs voltage doubling, reducing the required transformer size while doubling transistor efficiency. Operating from a 28-V dc input, the resulting design delivered 1500 W at 40 V dc with 92% to 94% efficiency. The author explains how he developed this design and how it can be adapted for other voltage transformations.

What you’ll learn:

• How to reduce transformer size in non-isolated voltage-doubling power converters using an autotransformer configuration in a push-pull topology

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Author & Publication:

Martin Kanner, KEMCO, Power Controls Div., Plainview, N.Y, How2Power Today, Jun 13 2014

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