I have several bikes all with different motors. My favourite is my Q100, which at 17amps has speed and enough power to get me up fairly steep hills without pedalling, and it's extremely smooth and free-running. My other bikes have mainly Bafang BPM motors, which have more climbing power and are very unstressed the way I ride. I liked the Q100 so much that I thought I'd try the Q128, which is bigger and heavier, so I expected a corresponding increase in power.
I'm using a 10aH headway battery rated at 5C and showing 22amps on my watt-meter, but going up our test hill, it quickly slows down, and I have to pedal moderately to get to the top. My 250w Bafang at 20 amps can make it up without pedalling and I only need light pedalling with my Q100. The Q128 is rated at 400-500w! Is it a bad motor or is something wrong?
The controller is a KU93 and I'm running it with hall sensors. As far as I know the controller automatically detects phase sequences and hall sequences. The motor runs quite smoothly and reaches about 18mph, but not very much torque - about enough to get up slight/medium hills without pedalling. I'd say it's similar to a 250w Bafang at 15amps. It free-wheels nicely, so there's nothing causing drag. Other than soldering the shunt for more amps I'm at a bit of a loss what to do next. Any ideas?
One other thing. It comes with a 9pin connector and the phase wires are pretty thin. That's right 9 pins: 3 phase wires; 3 hall wires; two hall power wires; a white wire. Does anybody know what that white whire's for? I left it disconnected. I didn't connect the speed limiter. Anyway 22amps should give reasonable torque.
I'd also like to know if anybody else has compared the torque of this motor and how they found it.
Thanks for yout time.
I'm using a 10aH headway battery rated at 5C and showing 22amps on my watt-meter, but going up our test hill, it quickly slows down, and I have to pedal moderately to get to the top. My 250w Bafang at 20 amps can make it up without pedalling and I only need light pedalling with my Q100. The Q128 is rated at 400-500w! Is it a bad motor or is something wrong?
The controller is a KU93 and I'm running it with hall sensors. As far as I know the controller automatically detects phase sequences and hall sequences. The motor runs quite smoothly and reaches about 18mph, but not very much torque - about enough to get up slight/medium hills without pedalling. I'd say it's similar to a 250w Bafang at 15amps. It free-wheels nicely, so there's nothing causing drag. Other than soldering the shunt for more amps I'm at a bit of a loss what to do next. Any ideas?
One other thing. It comes with a 9pin connector and the phase wires are pretty thin. That's right 9 pins: 3 phase wires; 3 hall wires; two hall power wires; a white wire. Does anybody know what that white whire's for? I left it disconnected. I didn't connect the speed limiter. Anyway 22amps should give reasonable torque.
I'd also like to know if anybody else has compared the torque of this motor and how they found it.
Thanks for yout time.