Dual sensor systems

[indalo]

I note that, increasingly, hub-motor ebikes are utilising both a pedal rotation sensor and a torque sensor to inform the power delivery system what is required. Does anyone have first-hand experience of this technology and can say how well or otherwise it replicates the Panasonic crank-drive system?

While I have experienced the lag before power kicks in with some hub motors, I much prefer the instant power on tap produced by my crank-drive machine. Also, with hub-drives using a torque sensor, is the need for brake lever cut-offs negated?

Indalo

 

[Mussels]

I haven't got experience of this but like the idea.
My reservations are cost, reliability and restriction of bb choice.
I don't think the benefits will outweigh the cons.

 

[flecc]

Not personally, but A to B are very impressed with the TMM type of sensor that is being used on many of the new generation hub motor e-bikes, saying it compares very closely to the Panasonic type of torque sensor.

Rather than being coupled to the pedal shaft, the pressure sensor is mounted in a special flexing area of the rear frame dropout close to the spindle. This appears to have avoided the imprecise operation of the crank torque sensors previously used on some hub motor bikes.