Cant we do this?

[Xfactor]

Here's one of my burned up e-aero hv 45's clear'd of it's burned mosfets; awaiting new ones. When I get the power blocks repaired I will try the double stack.

found fets for the e-aero hv45's 48 pcs at 50 cent a piece 24 for dollars to replace all the fets on both boards not to bad. When I stack the we should have a 90 amp cont 180 amp burst 6s controller and it should do a little better than that cause it will have water cooling

[Xfactor]

That would be a nice esc to add back to the fleet.

[Xfactor]

Cornell thats a nice mod.

[CornelP]

Thanks, but I am still tempted to change the cooler with a proper copper watercooled one... I still not trust that epoxy for sealing... this means I have to desolder the center section to be able to remove it: just a major pain.

[Xfactor]

Nope the bottom board has through vias to the bottom just take the bottom heatsink off and put your brass cooling plate there.Dont forget thermal tape.

[Xfactor]

We have a need for a 120volt speed control

[Xfactor]

Andy maybe 120 is going crazy but honestly what obstacles can i expect if i want to design a ultra hv esc? Why dont we see higher voltage esc in"our" world?

[AndyKunz]

Safety!

48V is right near the threshold for killing people. Wet hands + 48V = enough mA to stop your heart.

Andy

[Xfactor]

So its hardly hobby at that point. Where do you see these type of controllers? Military apps?So we should practice extreme caution. Would you discourage the design for this reason? Cant one implement a safety switch of some type? A big circuit breaker of some type.

[AndyKunz]

It takes less than 20mA to kill you.

If you can come up with a safety device that allows you to draw hundreds of amps in normal operation yet protects from a 20mA current change when somebody touches the terminals either directly on via water, EE's around the world will worship you.

I would discourage a person from working on a device unless he is willing to lose his life for an instant of bad judgment. I am not.

Andy

[Xfactor]

If thats the case better leave electronics alone then cause I deal with things everyday that can shock and kill you.A toaster can do that.To me thats a part of dealing with electronics you can get shocked seems obvious to me. I was talking along the lines of design obstacles. Never sasid that i could come up with a device worthy of a nobel peace prize. I asked did you know of a way to make it safer. Sometimes "no" is an easier answer. That wont stop my quest or any other person that makes a living with electronics.I mean a esc that pulls 200 amps on 14s doesnt seem to be something id want around water but its there. Hair dryers sit around the sink and run on 120.Maybe i can win a peace prize for a ultra hv speed control if team xerox doesnt beat me to it.

[Xfactor]

The motors can handle it so theres a need for it.Im sure spektrum doesnt throw electronic designs in the trash simply because you can be shocked. But i bet theyd love to be the first on the market with an ultra hv esc. Just put a caution sticker on it like everything else that can kill you. Hell if one of these boats come off the water and hit you in the head youll be dead too. Everything will kill you oh well.

[drwayne]

Turnigy monster 2000 cleaned and awaiting new fets and word from one of the several vendors that I have made request to.

I had 2 burnt M2000 ( from HC )
I replaced the fets with FS3206
better yield and back emf tolerance
The M2000 ( turnigy monster) ... can successfully stack 2 FET arrays using the one controller board.
I assembled one of these on order for a 33% EDGE540.
6AWG to battery bus ( total ) 12S4P
Soldered direct to motor
Added a bank of // 16x440uf 63V low esr high yield to inputs
heatsinking/cooling the largest issue as these created massive heat pockets when pushing 18KW peak .... makes for some very hot airflow through the vents
Client gave a thumbsup after several flights.. all I know..he later returned interstate all smiles...

Same applet at 12S240A manuf for 700 heli with staged governor output.
Cap bank was larger than the 12S1P due high yield required for 3D.!
A popular mod in big 3D.

DocWayne

[AndyKunz]

Hair dryers sit around the sink and run on 120.

GFI.

There's a little difference between household AC and in-boat DC.

Andy

[Xfactor]

But these esc's drive a sinusoidial wave (AC).