Mid drive with torque sensor?

Jeffb

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Still searching for a motor to put on a conversion that uses a torque sensor. I see bafang has the ultra series but it is not for conversion. Only for custom designed frames to mount it.
 
Still searching for a motor to put on a conversion that uses a torque sensor. I see bafang has the ultra series but it is not for conversion. Only for custom designed frames to mount it.
Have you looked at the tongsheng TSDZ2 systems? I believe they have torque sensor tech built in.

 
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Still searching for a motor to put on a conversion that uses a torque sensor. I see bafang has the ultra series but it is not for conversion. Only for custom designed frames to mount it.
I have about 2,000 miles on my 750w Tongsheng TSDZ2 with open-source firmware/blue nylon drive gear and it has been doing the job for me.

My use case:
  • ICE Adventure HD tadpole trike
  • Rohloff 14-speed geared hub
  • 200-pound, 82-year-old rider
  • Moderately-hilly terrain in SE Penna about 23 miles west pf Philadelphia
  • 90% paved sidewalks and multi-use paths, 10% dirt and grass.
  • 700 wh 50v battery kept between 20 and 80% of max charge.
  • Use of pedal assist mostly restricted to too-steep hills , particularly heinous headwinds, and situations where I want to accellerate quickly and hold more speed (as in the occasional calculated risk situation where I wind up riding a few hundred yards on an automobile road)
I find the noise level acceptable with the nylon gear - and I have been accused of being neurotic about noise. I suspect I would find a brass or bronze gear tb too loud.

I have the motor capped at 350 watts and it seldom breaks 250 even on the steepest hills at 3 mph in lowest gear.

The only gotcha I have found is that when the 860c display bit the big one, the replacement display had a different version of the firmware on it and I had to buy a little interface thingie and figure out how to re-flash the new display with the same firmware version as the motor.

Other than that, the TSDZ2 with open-source firmware has been the cat's ass for my application and I would not hesitate to do it again.
 
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