Jozzer wrote: For dual Kelly controllers on one throttle, we just tied gnd from both throttles and used just one controllers 5v supply to power them, this worked out well..
IIRC the Kelly of that power range has optically isolated inputs doesn't it? Even if it doesn't, I think the problem we are seeing with these infineons has to do with the firmware. It is not the best.
Arlo1 wrote:So last night on my bmx with 24s 2p lipo and X5 and a 24fet running ~180 amps peak (detuned a bit for less waste) I was ripping and hit the railway tracks then my throttle fet funny and my bike slowed down I twisted off then on and it was ok for a bit then nothing again so I let off and wham it went full throttle.... I have ebrakes thank god and used them to keep the controller shut off till I pulled over and found the cheep plastic housing was busted so the magnet was spinning away from the hall in both directions! I carefully road home but man I now understand we need something with a fail safe!
This happened on my KMX trike. I "pulled up" too hard on the throttle which caused the plastic grip to pop out, release the spring, and then pop back down. The throttle was then free to slide back and forth hammering full throttle. The 20A ebike guys may not understand... but anyone who has built a monster and had it get away from them sure does
I was once walking my bike through the living room past my mother in law when I accidentally blipped the throttle. It climbed all the way up my front door and bounced the front tire against the ceiling and left a burnout on the floor and door. Freaked her the hell out
I keep the bike turned off now until I am on top of it
Another night we were prepping one of Steve's bikes for the TTXGP... We had just finished and the rider was going to test it out. She had NEVER ridden an electric before and she clearly had no idea how hard they kick off the line. (this is a full size race bike with dual Agni and 80Ah Lipo, not a bicycle) The controller was on and everything was ready to go but due to a bug in the Kelly firmware it was locked up. Ok - that was not such a big problem... the problem was that she had the bike pointed at a group of us, she was sitting all the way back on the seat, back straight, and she was rolling the throttle all the way up and down, back and forth saying "it doesn't work". OMG - I was waiting for that bike to explode out from underneath her... The Kelly has a "high pedal lockout" but that only applies on powerup. If the problem had been a loose connection or something like that and the controller had kicked on while at full throttle. Pfffftttt.... what a mess.
Increasing battery voltage and controller current limit will result in a non linear experience