The Modular Bench Power Supply ++, Getting the higher voltages for high side MOSFETS

RE: The Modular Bench Power Supply ++, Getting the higher voltages for high side MOSFETS

jw0752 — Wed, 18 Feb 2015 09:37:57 GMT

Hi Peter,

The physics say that if the transformer was truly in saturation there should be no voltage output in the secondary as dB/dt will have gone to zero and induction will have stopped. If you can set up the experiment again and turn off the vector output of your scope we should be able to see if voltage is lost in the time period that looked like a clip before. I can see no way for a transformer to put out a DC voltage into a purely resistive load as the clipping seemed to indicate. If your scope will plot only data points we should get a clearer indication of what is happening.

John

RE: The Modular Bench Power Supply ++, Getting the higher voltages for high side MOSFETS

jw0752 — Tue, 17 Feb 2015 19:31:47 GMT

Hi Peter,

Ever since I watched your video last night I have been scratching my head over the clipping that we saw when you put a resistive load on the AC voltage of the secondary of the transformer. As far as my limited understanding goes I believe that you can load an AC voltage with a passive resistance right down to almost 0 volts without loosing the full sine wave. Is it possible that you were using an active component to load the 24 VAC or were there other active components involve in the production of the 24 VAC sine wave? I know you also noticed this problem and I just wanted to know that my curiosity has been peaked.

John

RE: The Modular Bench Power Supply ++, Getting the higher voltages for high side MOSFETS

jw0752 — Tue, 17 Feb 2015 09:05:47 GMT

Hi Peter,

Thanks for continuing your power supply series. I have watched this video and found it very informative. I am away from my shop and so I can't prototype the circuits as I usually like to do but I have book marked the videos and I will follow through when I can.

John