Motor Built-in Cadence and Speed Sensors
- Category:Motor-integrated sensor
- hit count:
- Release date:2019/07/12
Motor Built-in Cadence and Speed Sensors
The sensor is unique because of its particular magnetic induction mode, with the induction circuit fixed onto the stator of rear hub motor, while the induction magnet disc is attached to the rotating freewheel. Since the freewheel rotation is synchronized with the pedal movement, the pedaling cadence and direction can be told by revolution of the freewheel. In the meantime, what’s unique about this sensing system is that it can tell if the rider is truly pedaling (true pedaling means that the chain is engaging the freewheel and the bike is not freewheeling, so that the pedaling cadence is proportional to the riding speed; while freewheeling happens when the pedaling cadence is lower than the wheel revolution). In this case, we can make sure the motor is providing assist in any gear ratio. This is a highly integrated solution requiring minimum motor modification, making the production very convenient. Meanwhile, its 10-pin cable ensures a cleaner and concise system cable routing.
| 1 | Working voltage | 5V-6V |
| 2 | Working currentIdd | <15mA |
| 3 | Cadence signal pulse during one full forward pedaling cycle (P1 is the teeth number of front chain ring, while P2 is the teeth number of the engaging freewheel) | P1/P2*8(usually 24 pulses) |
| 4 | The output pulse duty ratio D | 35%-40% |
| 5 | Spacing between inductionmagnet disc and induction surfaceat the right end motor cover | 9-12mm |
| 6 | Cadence signal output current Itor(note:there’s a 200Ω internal resistance in output circuit) | 1mA |
| 7 | Working Temperature | -20 - 125℃ |
* Product profile：
This product is granted national patent for utility models.
