Ykick
1 GW
LFP - Live Fire Pricks...
race ebike on dyno, flames and plasma! 40kw IN, 10hp OUT.
- Thread starter liveforphysics
- Start date
salty9
1 kW
I think he was just trying to see if it were Lukeproof 
SplinterOz
1 kW
I think that one is cooked... get the next one
It is sometimes good to test things to failure.
It is sometimes good to test things to failure.
liveforphysics
100 TW
Big Tuna said:
Thank you Tuna. You taught me the finer points of stressing parts everything.
Wish you had been my crew today bro. I needed your master crewchief skills.
Doctorbass
100 GW
Now, maybe it's time to do the same with one of those RC motors 
Plus... they are 5 times less expensive than hub motor... so you have more show for the money!!! !!
At the isane speed they rotate and with their OEM vented holes i'm sure it would look like this:
Doc
Plus... they are 5 times less expensive than hub motor... so you have more show for the money!!! !!
At the isane speed they rotate and with their OEM vented holes i'm sure it would look like this:
Doc
auraslip
10 MW
- Joined
- Mar 5, 2010
- Messages
- 3,535
Excuse my ignorance, but what exactly killed the motor? The heat obviously, but what did it kill? The phase cables and the hall sensors? Did the copper melt? Did the magnets go past their Curie temperature and lose their magnetyness? (trying to sound like I don't know what I'm talking about here because I don't)
Is it possible to rebuild this motor?
Hate to see all your hard work destroyed with out even a good ride on it....
Is it possible to rebuild this motor?
Hate to see all your hard work destroyed with out even a good ride on it....
John in CR
100 TW
auraslip said:
They pumped 40hp of electricity into the motor and only got 10hp of work out of it. The other 30hp turned into heat, mostly in the windings. That's over 20kw of heat
, which caught the wire varnish on fire shorting the phases for those beautiful plasma flashes. If you're going to burn up a hubbie, you might as well do it right. nieles
10 kW
John in CR said:They pumped 40hp of electricity into the motor and only got 10hp of work out of it. The other 30hp turned into heat, mostly in the windings. That's over 20kw of heat
so the controller was be able to limit the current to the phase wires when shorting? that means mabye this controller can even withstand one of the big outrunners wihtout blowing the fets.
They pumped 40Kw (53.6hp) into that motor!!!!John in CR said:auraslip said:
They pumped 40hp of electricity into the motor and only got 10hp of work out of it. The other 30hp turned into heat, mostly in the windings. That's over 20kw of heat
I cant remember if this was lukes sevcon controler or the big Kelly but yes it would work for collossus its just that both kelly and sevcon controlers are not cheep!nieles said:John in CR said:They pumped 40hp of electricity into the motor and only got 10hp of work out of it. The other 30hp turned into heat, mostly in the windings. That's over 20kw of heat
so the controller was be able to limit the current to the phase wires when shorting? that means mabye this controller can even withstand one of the big outrunners wihtout blowing the fets.
liveforphysics
100 TW
Arlo1 said:I cant remember if this was lukes sevcon controler or the big Kelly but yes it would work for collossus its just that both kelly and sevcon controlers are not cheep!nieles said:John in CR said:They pumped 40hp of electricity into the motor and only got 10hp of work out of it. The other 30hp turned into heat, mostly in the windings. That's over 20kw of heat
so the controller was be able to limit the current to the phase wires when shorting? that means mabye this controller can even withstand one of the big outrunners wihtout blowing the fets.
It's a 42fet controller with 150v fets in it.
This hubmotor is roughly 1/15th of the stress on a controller that the colossus motor would put on a controller. (going from phase resistance and inductance differences).
Essentially, running power to a big hub is a cakewalk (which is why I chose a hubmotor). Running power to a big RC motor is a challenge. I think this controller would do as well as anything on the market right now, but I think it would pop it at low RPMs if you loaded it hard.
Doctorbass
100 GW
luke.. have you any pic of the inside o fthe sevcon??
liveforphysics
100 TW
Doctorbass said:
Yes. Explicit photos of everything inside the case.
It's 6 rows of 7 TO-220 fets in parallel. It runs the infinion brand 150v FETs, which are actually pretty good stuff. Lots of good cap. Hall-effect based current sensors on 2 of the output phase legs. It's a pretty solid piece.
Doctorbass
100 GW
liveforphysics said:
Now let see these pics!
grindz145
1 MW
no not those pictures.... 8)
icecube57
10 MW
Sorry we have to keep this forum clean you cant have upskirt photos of controllers being posted... Although I think Hyena would be good at snagging some nice candid shots....
boostjuice
10 kW
liveforphysics said:
Luke, can you please post these photos. We are dying to see the inside of a top-spec BLDC controller that wasn't designed/built in mainland China to penny pinching economics.
liveforphysics
100 TW
Ok, Ok, I dug through my massive pics-that-need-to-be-uploaded folder and dug these out and hosted and posted them just for you guys.
I spoil you guys. :lol:
Incase you can't read the name on that FET in the 116v controller, it's this one:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=IPP075N15N3%20G-ND
I spoil you guys.
:lol:
Incase you can't read the name on that FET in the 116v controller, it's this one:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=IPP075N15N3%20G-ND
liveforphysics
100 TW
The above pics are of the "Size 4" controller. It's a 42fet, and has active phase current monitoring, temp monitoring, does sinus waveform output, has elaborate internal temp monitoring and auto-current cut-backs, takes UVW encoders (halls) as well as AB encoders or Sine/Cosine encoders. It also has a data screen that plugs into it and displays and logs all the power related things (kinda like a CA).
However, it literally has 30pages of menus and crap to setup to get it dialed in. It's also not as fast for high speed commutation with difficult to control motors as I had hoped it would be. Those things and price are it's only downsides that I've found.
However, it literally has 30pages of menus and crap to setup to get it dialed in. It's also not as fast for high speed commutation with difficult to control motors as I had hoped it would be. Those things and price are it's only downsides that I've found.
Doctorbass
100 GW
Thanks Luke for posting these info.
I see some IRFB3077 fets on the picture and you also show a link for some IPP075N15N... Are they the equivalent?
42 fets... impressive.. and.. i remember you in the past saif that controlelr with these TO-220 are premitive desing.. and the junction temp is limited and best is bigger fets.. or igbt style..
What are your impressions on the pcb and heatsink desing of these 42 to-220?
I see some IRFB3077 fets on the picture and you also show a link for some IPP075N15N... Are they the equivalent?
42 fets... impressive.. and.. i remember you in the past saif that controlelr with these TO-220 are premitive desing.. and the junction temp is limited and best is bigger fets.. or igbt style..
What are your impressions on the pcb and heatsink desing of these 42 to-220?
