Hello, I have problem with my GNG modded controller, probably.
It was working since I push to motor a lot of torque. Actually motor had problem to start spinning.
My modded stock controller worked above 50Amps. I soldered another shunt.
Now it doesn't spin, I measured voltage on throttle
between red and black, there is 4.4V. When using throttle, voltage between black and green is changing.
I measured voltage on motor Hall sensors, it varies based on motor rotor position when manually spinning.
I measured motor phases when manually spinning, there was small voltage between each phase till spinning.
When battery is plugged but no throttle, there is always full voltage on one of motor phase, doesn't matter in which position is rotor.
Does it problem with controller (burned semiconductor power parts)?
Thanks.
Edit: It seems one FET is broken. These HY1707 FET are probably not able to run over 2kW.
By datasheet specification one can run at 180W, it means 180x9=1620W max power.
Edit2: After changing broken FET to replacement IRFB3207ZPBF
http://www.gme.sk/irfb3207zpbf-p213-318 motor start to work. This FET has also higher wattage.