As you know I am working on a BLDC controller Here OK So Its time to design my power stage. From this I will build 3 6 fet prototypes to test irfp4568 x6 irfp4668 x6 and irfp4468 x6 to their destruction Probably on my X5 but we will see it it can handle the power.... Once done I will look at the make power numbers and max current to see what I was to build for running colossus.
The Plan its to build the best layout possible. What I am thinking is using aluminum to prototype with then maybe built the finished product with Copper if it shows any advantage.
My goals are in this order. Best location of parts, Best cooling, Best size, best weight, best price.
What I am thinking is 3 layers all horizontal to each other with the fets laid on their backs the drain from the metal back on the body and the leg both attached to the Positive rail on the Hi side fets and on the phase rail on the low side fets. To help cool as good as possible and to keep the resistance as low as possible!!!
SO can anyone point me to something that's good to use to electrical isolate three layers of copper or aluminum but conduct heat though so I can cool the bottom?
and or a non conductive liquid??? This it my schematic so far....
The Plan its to build the best layout possible. What I am thinking is using aluminum to prototype with then maybe built the finished product with Copper if it shows any advantage.
My goals are in this order. Best location of parts, Best cooling, Best size, best weight, best price.
What I am thinking is 3 layers all horizontal to each other with the fets laid on their backs the drain from the metal back on the body and the leg both attached to the Positive rail on the Hi side fets and on the phase rail on the low side fets. To help cool as good as possible and to keep the resistance as low as possible!!!
SO can anyone point me to something that's good to use to electrical isolate three layers of copper or aluminum but conduct heat though so I can cool the bottom?
and or a non conductive liquid??? This it my schematic so far....
I cut up what I need for a 6fet controller and here is what it will look like. Once I test this I will cut the rest to make a bigger 24 or 36 fet controller with TO-247 package fets of what voltage I find best to work with what winding works best as a package for colossus. I have seen the 100v fet on paper will produce ~3 times less heat so....
(double meaning)
