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Hi Guys,
I would like to buy a ready-made control for a push-pull circuit, so that I can easily control 2 mosfets or IGBTs directly.
I've already seen a few controls on ebay where you can adjust the pulse width and frequency via buttons and see on a digital display which settings have been made.
As it looks but are the pure 1 channel PWM controls, I have unfortunately received no response from the sellers.
Why and what I need it for:
I would like to bring the 3-phase transformer, which serves as a ferronic resonance transformer, into resonance via the drive winding via a push-pull signal in order to find the sweetspot for the lowest operating energy.
Since the transformer has a bifilar winding, it can be operated in simple push-pull operation.
Under rectangle generator, I found only that, but I do not think that this is the right one.
https://www.ebay.de/itm/Rechteckgenerator-1-Hz-150-kHz-einstellbares-Tastverhaltnis-0-100/223003507660?hash=item33ec0b7bcc:g:MPQAAOSwQW1a0kQt
As far as the grounding of the FR-transformer is concerned, as much talk about grounding, I have to say if I operate the transformer at 1250V URMS in resonance and the grounding wire to the core hold small sparks, I thought only that would be short circuits between the isolated laminated core but with a simple screwdriver you can not replicate that. The oscilloscope also records the energy peaks, but the earthing cable only ever stays in contact for a short time. Nothing happens for just a brief touch. A small blue spark jumps over, unfortunately not visible to the video camera.
regards
Sven