Lossless dV/dt control of PWM pulses: An intuitive explanation

Reference
J. Korhonen, J. Ström, J. Tyster, P. Silventoinen, H. Sarén and K. Rauma, "Control of an inverter output active du/dt filtering method," 2009 35th Annual Conference of IEEE Industrial Electronics, Porto, 2009, pp. 316-321, doi: 10.1109/IECON.2009.5414941.

[@taki_maciek4799]

Another great and informative film, thank you :)

[@sambenyaakov]

Thanks

[@Xeenych]

Great!

[@sambenyaakov]

Thanks

[@justinn771]

It's always quite informative and useful. Thank you Prof. Sam.

[@sambenyaakov]

Thanks

[@peteweisz1581]

Very clever!! excellent presentation too

[@sambenyaakov]

Thanks

[@electronic7979]

Very helpful video

[@sambenyaakov]

Thanks

[@marcoatzeri4138]

Very interesting, thanks.
Of course at page 9 the bottom formula has a typo: should be 120 instead of 240 in the last term.

[@sambenyaakov]

Thank for note and correction. I could have said that I put it on purpose to test the viewers, but it was a slip😊

[@aa-bu7ml]

Excellent

[@sambenyaakov]

Thanks

[@Cydget]

Cool, this seems to cancel out the w0 frequency caused by the filter. I wonder if the wires to the motor and motor itself have their own undesirable oscillation freq that could be removed with even fancier switching. I'm also wondering if this can be used for getting better rfi results when doing forward phased lighting dimming as the fast switching edge leads to ringing with certain loads

[@sambenyaakov]

Yes, there is still a lot to be revealed 😊

[@shaileshchityala2787]

❤️❤️❤️❤️❤️🙏 thank you

[@sambenyaakov]

Thanks

[@martinmartinmartin2996]

Very helpful. It would be even MORE helpful if Prof Ben-Yaalov gave some info concerning the additonal power losses caused by this technique.
Question: what are the cost implications of using LC " 3 phase " technique of this idea, especially the cost of a 3 phase motor?

[@sambenyaakov]

Thanks for bringing up this point. But the real question is: what is the power loss and cost in comparison to others solutions: 1. A full fledged filter with damping resistors, 2. Slowing down the dV/dt and increasing the power loss which will require more heat removal .

[@tamaseduard5145]

🙏🙏🙏❤️🙏🙏🙏

[@sambenyaakov]

👍

[@NiHaoMike64]

Wouldn't another lossless way to clamp the ringing be to put diodes on the output to stop it going beyond the rails?

[@sambenyaakov]

Not really.