DC Direct EV charger - DIY Build

Might be of interest

What part of the puzzle do you see this board solving?

solarsimon said:

https://www.infineon.com/cms/en/product/evaluation-boards/eval_bdps_driver/

Might be of interest

Click to expand...

Circuit topologies like that date back almost a hundred years, long before the transistor era.
Synchronous "switches" in primary and secondary of a transformer give bi directional dc power flow between two different voltages.

Back in the old days a "vibrator" buzzed away with two sets of synchronized changeover contacts. One set of contacts produced an alternating square wave in the primary. The second set of contacts changed the square wave secondary voltage back into dc. Mechanical synchronous rectification in effect.
It was the way the very first car radios generated a couple of hundred volts for the valves from a six or twelve volt car battery.

The curious thing is that a supply like this also works just as well in the reverse direction.

In the picture you can clearly see the black rectangular transformer with eight connections.
It should work much better with mosfets than vibrating contacts, but the principle is exactly the same.

As Z.D. above asks, I am not sure how this actually applies to this thread.

zanydroid said:

What part of the puzzle do you see this board solving?

Click to expand...

It was their wider product range, of which that's a part, I believe. I got led there by a fb ad by Infeon, boasting 15kW modules which appeared stackable. Frankly, I got pretty lost in the sae of products and posted something related. I should have clicked the back button, but it's gone now...
Sorry if it's wildly off track.

Edit: Almost got back to where I was initially led. Here's their overview



And


That's an overview of their design guide, with clickable elements highlighting the products for each subsystem.
It's all at https://www.infineon.com/cms/en/applications/industrial/ev-charging/dc-wallbox/

It's still not the product I originally saw unfortunately

Thanks, that makes a lot more sense. How much are these components?

zanydroid said:

Thanks, that makes a lot more sense. How much are these components?

Click to expand...

£1500 / 1800 USD for a 15kW module, but that's the one bit I still can't find

Pic above, manual below