EVX2 problem - maybe ?

[marcus]

With all the brushless antics going on with my trucks I figured it'd be a relaxing break to run my stock Emaxx in the snow with the dogs - they love it.

Anyhoo, I threw my 2S 5000 LiPos on and had some weird happenings.

The EVX2 wouldn't take a punch to WOT. It would just shudder slightly and cut out. I didn't have to reset the esc though, just throttle off and reapply more smoothly.
Same in fwd or rev.
Weird.
So I play around, test the connections etc, recalibrate the esc-tx but the same.
So I throw on a pair of 3000 nimh's and the EVX2 loves them. No problems at all !!
WTH?
I wasn't aware of an overcurrent lockout on the EVX2 but is the added punch of the LiPo's triggering something [?]

[BL_RV0]

Your ESC is going into overvoltage protection.

[marcus]

Originally Posted by BL_RV0

Your ESC is going into overvoltage protection.

Overvoltage? During a current surge the voltage is at it's lowest.

The EVX doesn't have an Overcurrent hook either apparently, so it's all a bit weird.

I ran the Maxx today on a pair of 3000 NiMh packs. The EVX behaved perfectly although the performance was dismal [compared to the pair of SMC 2S 5000's].
Maybe the FETs were folding over with the lipo surge current............

[E-Revonut]

Mine did the same thing. It is an overvoltage protection of sorts I beleive. Nixx drop voltage so much under load and Lipo doesn't and thats what it's seeing. After a couple minuutes mine stops doing it. But be careful I fried my motors running Lipos!

[marcus]

Yea, I can see that. The current surges but the volts stay strong so the power goes through the roof.
I can live with fried motors but I'd rather not have to swap out the EVX hehehe

[E-Revonut]

My evx is still going, just go easy on the throttle for the first couple minutes and it doesn't happen.