John 987 Posted August 14, 2015 Share Posted August 14, 2015 Hello ExpertsI have an existing 16 inch-wheel hub motor. The controller and battery were damaged and I ordered a new set but not from original supplier.I am not sure what motor rating is the new controller designed for. My new battery is rated at 67v max.After assembling the motor to the controller and battery pack, I turned on the unicycle and I lifted the wheel before powering it up. The gyro is working and the wheel can rotate fore-aft.The only problem it seems is that when transitioning from one direction of rotation to the opposite direction (by tilting the machine), the motor seems to Jerk quite severely. i was terrified by this weird reaction.I tried switching the order of the hall sensor wires but it got worse eg. the motor could not rotate or went berserk with strong sudden wheel spins.So, I stuck to the initial hall sensor wiring which allowed the motor to rotate fore-aft.My suspicion of what could be wrong :1. The motor may be rated higher than what the controller is designed / meant for.The controller may be meant for a smaller 14 inch hub motor. The existing motor is 16 inch and could be rated higher wattage. Maybe the coil ratings or impedance is not suitable? I have no clue. Just guessing. Does my suspicion make any sense? Is the jerking due to incompatible motor ?Or could it be that :1. The gyro and accelerometer need to be re-tuned ? the controller need to re-learn with this motor?Lifting the wheel in the air above ground and turning it on, the machine is able to rotate fore-aft and seems rather balanced horizontally.Kindly could you help give me some clues as to what could be the cause? Thank you for reading.Have a nice day. Best regardsJohn Link to comment Share on other sites More sharing options...
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