Dear all,
Do any of you know how the pedal magnet sensor work in pedicab or electric bike (pedal assist system)?
I mean how the sensor read the pedal rpm or torque, I saw there 5 magnets located near the pedal sprocket and the sensor fixed to the pedal's hub. So the sensor in fix and the magnet rotate.
before the hub motor work, what happen to the magnet sensor? and when motor is working what is red by the sensor so the controller can connect/disconnect the current from baterry ? Is it magnetic field, magnet induction (i'm sorry if i'm wrong), or what ?
And one more thing, The words " pedal assist system ". which one is the main power and which one is the assist power, the hub motor or the pedal power ?