For experiments on the bench I sometimes stick a solar cell on a heatsink and shine one of those crazy bright LED flashlights on it. Heatsink is needed because the solar cell overheats otherwise. The parasitic capacitance is mostly limited by the space available in the lab, and whatever shade is needed not to be blinded by such an arrangement. In terms of common-mode current this wins hands down and is almost embarrassingly simple. Of course it’s not practical to put into a product, unless large distances are already available. I’ve used this trick when isolating instrumentation for high voltage experiments (0.5-1MV). Let’s say that a lab setup lasting longer than a semester can be called a product :)
Budget alternative to power over fiber! Quite fun. I think isolation motor-generators are competitive for common mode coupling, once the power levels justify them, and definitely beat the efficiency.
@@absurdengineering Oh yeah! They sell billions of these every year to much less qualified people. Your suffering the "not invented here syndrom" and "solar" is Zeitgeist. Any average battery has much mope power and energy density than an solar panel. And guess what! You replace them for a dollar!
Great video professor! Would there be a benefit to replace the series resistor with the diode (R6) with a ferrite bead, or otherwise filter the bootstrap input current to present a higher impedance at HF?
Thank you again for this great video Prof. Ben-Yaakov. During the video in the section where you discuss "Sizing the capacitor", you took the Idr current as 5mA. But as you also encircled, it is 3mA max. I guess it is a typo right?
Hi professor, another important point is that is difficult to find a diode fast enough and not so expensive.
Well, I don't think it is that bad.
Basically SiC diode needed for SiC system, and same for GaN. WBG deices are getting lot affordable nowadays.
For experiments on the bench I sometimes stick a solar cell on a heatsink and shine one of those crazy bright LED flashlights on it. Heatsink is needed because the solar cell overheats otherwise.
The parasitic capacitance is mostly limited by the space available in the lab, and whatever shade is needed not to be blinded by such an arrangement.
In terms of common-mode current this wins hands down and is almost embarrassingly simple. Of course it’s not practical to put into a product, unless large distances are already available. I’ve used this trick when isolating instrumentation for high voltage experiments (0.5-1MV). Let’s say that a lab setup lasting longer than a semester can be called a product :)
Budget alternative to power over fiber! Quite fun. I think isolation motor-generators are competitive for common mode coupling, once the power levels justify them, and definitely beat the efficiency.
Ever heard about a invention called batteries?
Interesting. Thanks.
@@JacquesMartini Batteries in a teaching lab, left without air conditioning over the summer - spicy :)
@@absurdengineering Oh yeah! They sell billions of these every year to much less qualified people. Your suffering the "not invented here syndrom" and "solar" is Zeitgeist. Any average battery has much mope power and energy density than an solar panel. And guess what! You replace them for a dollar!
Great video professor!
Would there be a benefit to replace the series resistor with the diode (R6) with a ferrite bead, or otherwise filter the bootstrap input current to present a higher impedance at HF?
This might cause an over voltage . I will discuss this in next video.
Thank you again for this great video Prof. Ben-Yaakov. During the video in the section where you discuss "Sizing the capacitor", you took the Idr current as 5mA. But as you also encircled, it is 3mA max. I guess it is a typo right?
Just rounded it to take into account possible switching losses within the drive.
Hello Professor, Does a use of an active miller clamp resolve this issue which indirectly isolates the HS from main power supply?
No, Miller calmp attenuates the so called Miller spike
that can cause a shoot through.
Saludos !! No tienes canal en español?
No, sorry
@josesegura24 Puedes usar la traducción autogenerada al Español, es bastante buena
@@ganopterygon Puedes usar la traducción del español al inglés generada automáticamente, es bastante buena."
👍🙏❤
Thanks 😊