Alan B wrote:Sounds like the phase amp limiting algorithm is unstable. When you set it high enough it doesn't kick in. When it kicks in it oscillates.
Is there a sensor for phase amps? If not it must calculate them from battery current.
I looked for a sensor especially since I noticed an inductor type trace coming off each phase output that is not present on the EB212 boards, but I don't see anything that looks like a hall sensor, but then again everything is all surface mount. I didn't see any traced leading back to the ECU either. The inductor trace leads to an electrolytic which then goes back to the gate drive totem pole circuit. Without spending hours reverse engineering it I'm not sure how it's working (got too many other things to worry about).
Alan B wrote:I would think you would have to multiply the phase limit the same as the shunt calibration. So your phase limit may be really high now. The limit in that case is probably not the controller and the FETs may be at risk.
Phase is definitely limited by the setting. If I follow the 2.5x or even a 3.0x multiplier with the controller programmed for 20A battery (60A actual) and 60A phase it has problems accelerating from a dead stop and poor acceleration. Upped phase to 100A and kept battery at 20A and it's an entirely different animal and can loop me off the back from a dead stop. Programmed at 60A phase it has great acceleration and throttle response once moving above 15mph. Programmed at 100A phase the acceleration and throttle response seem the same to me once moving. Only change seems to be starting off and low speed.
I think the controller might be reading the actual phase output or making a damn good guess because changing the shunt should have changed the way regen kicks in.
Full size pics available of the phase section from an EB212 and an unbuilt EB312 board available here http://dynamic.opticalanarchy.com:8080/ ... ntrollers/
All the trace action on the EB312 is happening on the front. Sorry the on pic is a bit blurred but I just did some quick hand held shots. If you need detailed shots I can bust out the tripod/DSLR/macro lens and get you better pics.
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