DC-DC Converter with Transformer Sinusoidal Currents at 20kHz! Prof. ?uk
领英推荐
It is hard to believe that now, some 46 years later, that in 1983 our Power Electronics Group (PEG) led by late Professor Middlebrook and myself, has already generated that some in our PEG group call it now the Bible of Power Electronics: Vol. 4 My 310pages PhD thesis completed from 1974 until 1976 under Prof. Middlebrook guidance; Vol.1 and and Vol.2 collection of research papers published in 1981; and Vol.3 collection of research papers from 1981 to 1983! All together some 1200 pages providing the solid foundation for the Power Electronics yet to come! This was republished in 2015 and included 4 basic patents filed on Optimum Power Converter Topology later renamed ?uk converter by Professor Middlebrook.
Conclusion
The Power Electronics is at the critical crossroads! It made a wrong turn made many decades ago. Despite the fact that 20kHz switching with bipolar transistor did not bring any appreciable reduction in size expected in comparison to 60Hz AC transformer, it continued blindly in that direction of blind enormous increase of switching frequencies albeit with same DC to DC converters, like buck, boost and flyback which should all have been abandoned a long time ago! Unfortunately, even when these fundamental flaws were uncovered, and in fact, much better system solution was made available this continue till present time.
Fortunately, the revolutionary new system isolated DC-DC conversion technology is being currently developed which will bring not just incremental improvements but a true revolution! Simultaneous tenfold reduction in size, tenfold reduction in losses, and tenfold reduction cost and critical peformance improvements...
...and one more thing: at switching frequencies in 20kHz to 150kHz depending on badly needed scaling of power and current, which is presently limited to 1kW, higher power needed for On-Board Fully Electric Vehicles, among other applications such as MW DC distribution lines will be made possible!
CEO Efficient Power Conversion
4 年I am not aware of anybody that suggests a buck topology is the best topology for 48 V - 1 V at 10 MHz. Most applications are 48 V - 12 V or 48 V - 5 V. Here is a video that talks about some of the pros and cons of three different topologies at 48 V - 12, 6, or 5 V: https://www.youtube.com/watch?v=UxF8HMuzc_A These are solutions are widely used today with GaN FETs.
Engineer
4 年If you research the commercial switch mode, motor drives, telco rectifiers and renewable energy products, the fast majority of them still use “old” device technology. Very few if any have rushed to MHz switching speeds. Vicor still relies on soft switching to achieve MHz switching in their products using old switch technology.
CEO at TESLAco
4 年Here is a link to an article on Hybrid Switching Converter with Hybrid Transformer and sinusoidal currents with detailed explanations https://www.dhirubhai.net/posts/slobodancuk_hybrid-switching-converter-with-hybrid-transformer-activity-6675671574416375808-2S1V Converter circuit and salient waveforms attached