Smoking ESC

[lutach]

Lito,

I posted a few pictures in the ESC thread. They are for references only and you can use different caps as well if needed. Please do like I did to secure the stock caps so they don't bounce around.

[MetalMan]

Originally Posted by George16

I think you are right. It does make sense. The abrupt stop and go was probably too much for the FETs to handle without the caps.

Even Schultze tells you to use extra capacitors if your wires exceed a certain length. If my memory serves me correctly, this is due to the added inductance as a result of longer wires.

[lutach]

Originally Posted by MetalMan

Even Schultze tells you to use extra capacitors if your wires exceed a certain length. If my memory serves me correctly, this is due to the added inductance as a result of longer wires.

True. The wires on my ESCs are short and thicker then most of the Schulze ESCs and only their big dogs use 2 wires. The problem was what you pointed out before.

[George16]

Originally Posted by lutach

Lito,

I posted a few pictures in the ESC thread. They are for references only and you can use different caps as well if needed. Please do like I did to secure the stock caps so they don't bounce around.

Thanks for the pics. I'll definitely put more reinforcement in there to keep the caps from moving.

[George16]

Is it okay to put 2 additional capacitors even though it does not match the stockers? The 2 additional caps are rated for 35V, 105*C, 2200uF. These were given to me by killajb.

[lutach]

Originally Posted by George16

Is it okay to put 2 additional capacitors even though it does not match the stockers? The 2 additional caps are rated for 35V, 105*C, 2200uF. These were given to me by killajb.

Yes.

[George16]

Thanks. Now I can solder them tomorrow. I was just making sure that it's okay to do so.

[George16]

Here are some pictures of the 3mm aluminum plate I cut and installed on the bottom of the ESC. I also added the 2200 caps killajb gave me. Performance wise, I got the ESC temps to 150*F, motor at 112*F, and batteries 98*F yesterday. This was stop and go running on asphalt. I also experienced hesitation when I tried to run wot. Batteries are Neuenergy 25C 5000mah.

Anyway, here are some pictures:



Also glued a piece of rubber underneath the aluminum plate.


Added caps on the power wire. I also shrink-wrapped the standoffs.








I also installed some plastic spacers to clear the capacitor wires. The spacers widened the gap between the board and mounting plate. Better airflow for better cooling. The gap is about 3/8".




Gap before I installed the plastic spacers.