Graham Gunderson's Energy conference presentation Most impressive and mysterious

[Spokane1]

Thank you Spokane1 !

May I ask why why do my messages not appear? You replied to me but my original message is not on the thread and my status says that I have zero posts. Thanks!

Dear Smann,

That is odd. Your post showed up quite normally on my machine. Then again I've been given some moderator control buttons to use (which haven't been needed). I shall ask Chet K. he seems to know a lot about these things.

Spokane1

[ramset]

Spokane
His original post is #295 ...its there ,he must have missed it??
you can remove this post if you wish .

OH
and Congrats on the promotion !!

respectfully

Chet K

[citfta]

Thank you Spokane1 !

May I ask why why do my messages not appear? You replied to me but my original message is not on the thread and my status says that I have zero posts. Thanks!

Smann,

Your posts appear to be normal for me also.  Your post asking about GG seems to be normal to me.  And your posts after that also.  According to what I see you now have 6 posts total.

Carroll

[Spokane1]

Gentlemen,

Folks the drawing that was posted here this morning has some missing components this is a better version.

In my simulations of the H-Bridge circuit I have found that two of the MOSFETS are not active therefore making them unneeded. Upon further examination I have found that the entire H-Bridge can be replaced with one switch and a diode. The input to the primary of the Gunderson Transformer is the same in that it produces the same voltage and current wave forms with far fewer components.

k4zep made additional simplifications by proposing that the switching elements be placed on the low side of the circuit to better reference driver connections. This circuit variation also simulates the same as a full four element H-Bridge.

Graham said 7/18/2016 that he was planning to redo his H-Bridge with a two switch design. He also said that providing schematics to his demonstration device would be pointless since he was planning to re-do all the circuits. Both statements seem to be correct.

Anyway, here is the proposed simplified circuit. The elimination of three switching elements should reduce the gate leakage issue by 50%.

Does anyone see any issues with this design and why it might not work as good as a full H-Bridge in this application?

Oops the polarity on the 220 VDC power supply is backwards.

Also pardon for the large jpg capture. My computer crashed yestserday and I'm running in safe mode and have no access to my photo re-sizing tools. I have two job tickets into the company Help Desk.

Spokane1

[Spokane1]

Gentlemen,

Here is my take on the operation of the Synchronous Diode.

Comments Welcomed!

Spokane1