RC-Monster Forums - View Single Post - HV-Maxx motor thermal shutdown problem

Toon · 06:32 PM

I had another run with the HV this afternoon. Gearing was the same as before (14/66 = 12/66 stock), no bodyshell on, and I also removed the transmission gear cover to try and get a bit more airflow onto the motor/heatsink/motor plate to aid cooling. I got a little under 6 minutes runtime before the motor thermalled again, and I temped. the heatsink at ~150*F. ESC was 120 and cells were 110. The air temperature was 60*F.

I have sent an email to Charlie at Novak, asking about the suitability of the HV in a heavy truck, and am awaiting a reply. Who knows, maybe my HV system may even be faulty? It does seem strange that it's the motor thermalling, not the ESC, and that it seems to be doing it at a lower temperature each time.

Whatever the cause, I have just placed an order with Mike for a 9L, 9918, motor clamp/heatsink, and a UBEC. So very soon I will be either selling my HV system as it is, or sending it back to Novak for replacement, then selling that one. :rolleyes:

I expect good things from the new setup... :D

P.S. What size gold plugs/connectors should I use to connect the ESC to motor? Will 3.5mm-4mm be OK? I would have ordered some, but couldn't see them on the site. I intended to keep using the PowerPole/Sermos connectors on the battery connections (as seen in the pics in my 1st post). Will these will be OK, or would it be better to switch to Deans?

	(#13)
Toon RC-Monster Stock Offline Posts: 20 Join Date: Mar 2005 Location: United Kingdom	03.28.2005, 06:04 PM I had another run with the HV this afternoon. Gearing was the same as before (14/66 = 12/66 stock), no bodyshell on, and I also removed the transmission gear cover to try and get a bit more airflow onto the motor/heatsink/motor plate to aid cooling. I got a little under 6 minutes runtime before the motor thermalled again, and I temped. the heatsink at ~150F. ESC was 120 and cells were 110. The air temperature was 60F. I have sent an email to Charlie at Novak, asking about the suitability of the HV in a heavy truck, and am awaiting a reply. Who knows, maybe my HV system may even be faulty? It does seem strange that it's the motor thermalling, not the ESC, and that it seems to be doing it at a lower temperature each time. Whatever the cause, I have just placed an order with Mike for a 9L, 9918, motor clamp/heatsink, and a UBEC. So very soon I will be either selling my HV system as it is, or sending it back to Novak for replacement, then selling that one. :rolleyes: I expect good things from the new setup... :D P.S. What size gold plugs/connectors should I use to connect the ESC to motor? Will 3.5mm-4mm be OK? I would have ordered some, but couldn't see them on the site. I intended to keep using the PowerPole/Sermos connectors on the battery connections (as seen in the pics in my 1st post). Will these will be OK, or would it be better to switch to Deans? Last edited by Toon; 03.28.2005 at 06:32 PM.