Problem: I hopped on my bike this afternoon, pulled out of my driveway, and after about 20 feet, the motor made a loud growl and shuttered. A little further and it seemed to subside. I went up the hill and things seemed fine then as I got to a level spot in the road, it started again. Fortunately, it was downhill all the way to my house. I was bummed, since I got off work early today, and was eager to go on a ride.
Background: I rode my bike pretty hard on the weekend, but everything was working perfectly after the ride. I set aside Sunday afternoon to mount my new knobby tires and convert the wheels to go tubeless. Of course I had to uncouple the motor connections, but I also took the opportunity to lengthen some of the wires from the controller (throttle, PAS) since they were a little too short to work with. I also added Andersen connectors to the motor phase wires to make tire changes easier (instead of the insulated block that uses screws/nuts). Afterwards, with everything back together, I test rode the bike for about a 10 block loop (uphill for the first half, down the second), and everything worked fine (tubeless conversion held). Oh, and for this short loop, I also tested out increasing regen (C13=2), increasing it one level.
Observations/diagnosis: First thing I did was set C13 back to 1 and 0, with no effect. Tried running with PAS level 0 (throttle only), but with the same results. Lifting the rear wheel and apply full throttle, no movement; but doing the same and barely pushing the wheel, maybe a quarter inch, and the wheel spins up to full speed, although with a moderately loud hum (usually it's near silent with the sine wave controller). Any load, and the motor shutters and growls. I unplugged the hall sensor wires and plugged them back in, in case there was a loose connection, but same result. I also tried a few of the motor phase settings (C2) which had no improvement. The growl is there whether the motor is activated by throttle or PAS.
I need some hints on where to start on this. The odd part is that everything was working great a few days ago. Any help would be greatly appreciated. Seems like something related to the hall sensors, but I'm hoping it's not the sensors themselves.
Tech Specs:
Motor:
26” Rear Hub - MXUS model: XF 40 1000W 1610 0020
48V, 1000W
Controller:
Sine Wave - RisunMotor model: KT36/48SVPRK-SLSO2G
Maximum current: 45±1A
Rated voltage: DC36V/48V
Rated current: 22A
18 MOSFET
Display:
KT-LCD3
Battery:
Li-Ion – Unit Power Pack - 52V, 20Ah, 30A BMS
Background: I rode my bike pretty hard on the weekend, but everything was working perfectly after the ride. I set aside Sunday afternoon to mount my new knobby tires and convert the wheels to go tubeless. Of course I had to uncouple the motor connections, but I also took the opportunity to lengthen some of the wires from the controller (throttle, PAS) since they were a little too short to work with. I also added Andersen connectors to the motor phase wires to make tire changes easier (instead of the insulated block that uses screws/nuts). Afterwards, with everything back together, I test rode the bike for about a 10 block loop (uphill for the first half, down the second), and everything worked fine (tubeless conversion held). Oh, and for this short loop, I also tested out increasing regen (C13=2), increasing it one level.
Observations/diagnosis: First thing I did was set C13 back to 1 and 0, with no effect. Tried running with PAS level 0 (throttle only), but with the same results. Lifting the rear wheel and apply full throttle, no movement; but doing the same and barely pushing the wheel, maybe a quarter inch, and the wheel spins up to full speed, although with a moderately loud hum (usually it's near silent with the sine wave controller). Any load, and the motor shutters and growls. I unplugged the hall sensor wires and plugged them back in, in case there was a loose connection, but same result. I also tried a few of the motor phase settings (C2) which had no improvement. The growl is there whether the motor is activated by throttle or PAS.
I need some hints on where to start on this. The odd part is that everything was working great a few days ago. Any help would be greatly appreciated. Seems like something related to the hall sensors, but I'm hoping it's not the sensors themselves.
Tech Specs:
Motor:
26” Rear Hub - MXUS model: XF 40 1000W 1610 0020
48V, 1000W
Controller:
Sine Wave - RisunMotor model: KT36/48SVPRK-SLSO2G
Maximum current: 45±1A
Rated voltage: DC36V/48V
Rated current: 22A
18 MOSFET
Display:
KT-LCD3
Battery:
Li-Ion – Unit Power Pack - 52V, 20Ah, 30A BMS