xlyte controller gone Kaput???

[SniperGaulois]

I was going up a steep path today and i was thinking... hm that's odd it's only putting out 20 amps instead of maximum and it feels abit different. and the the bike stopped. i felt the controller it was about 70 degrees C, so i let it cool. 20 minutes after, everything on, bike is stopped. wheel goes round with extra buzzy resistance even when controller is off, until i unplug the 3 phase wires, then it turns nicely. i ve done 750 km on this controller, it was new. any hunches please????? i dont think it's the motor and it says 53v in?

 

[sardini]

First most of the time when you set up for example 20amp the controller it is drawing 25 or more so you don't know for sure.

second the thinks became even harder if you don't Know the phase current and worst part is that you control the speed not the power of the controller..

So put o temp sensor inside the controller fets and take care.

 

[alsmith]

Consider getting one of those ebike testers- it would help identify problems without loads of fuss.
Lyen sells them, or they are on ebay.

 

[Ghost (bike)rider]

If the wheel goes round with physical resistance, it is likely that on or more FETs in the controller have gone short circuit, and disconnecting two of the phase wires will confirm the problem when the wheel spins ok again.

I once went up a steep hill with a Crystalyte controller and blew the FETs in the same way. I changed them over with a soldering iron and a couple of hours work.

 

[SniperGaulois]

If the wheel goes round with physical resistance, it is likely that on or more FETs in the controller have gone short circuit, and disconnecting two of the phase wires will confirm the problem when the wheel spins ok again.

Oh Great! that sounds like and adventure in fixing land! ok.

it's a 40a controller on a fairly mild battery, i was also suprised when it generated 20amps and then kindof went backwards a moment and then was fried! it;s indeed the controller. great testing board there, the holy grail, i will have one of them one day.