I want to get into tuning of ebike hub motors, what would be the ideal dyno setup to put some load on the motor that peaks at 100-200nm of torque?

[phobos]

I want to get into tuning of ebike hub motors, what would be the ideal dyno setup to put some load on the motor that peaks at 100-200nm of torque?

 

[amberwolf]

Are you looking to build a dyno, or buy one?

 

[DanGT86]

I have used a 2nd motor with a regen capable controller to tune a motor under load. Idk how much you will want to spend on it or how precise it needs to be but its a quick and dirty dyno if you have lots of motors and controllers laying around.

Most hub motors have a brake flange you can attach sprockets to. Running a chain between the 2 motors gives you a poor man's dyno.

You also have to contend with people accusing you of trying to build a perpetual motion generator.

 

[E-HP]

I have used a 2nd motor with a regen capable controller to tune a motor under load. Idk how much you will want to spend on it or how precise it needs to be but its a quick and dirty dyno if you have lots of motors and controllers laying around.

Brilliant! It's even tempting me to set one up with and old motor and controller just for fun. I probably even have the metering in my parts box.

 

[DanGT86]

Thanks. Here was my version. The 80100 RC outrunner is being loaded by a 9c hub motor doing regen. Made me feel a little better to send at least some of that power back to the battery. Its way easier to tune this way than to look at the display while riding.

I have also thought about making a similar device with a pump, fan, or an old exercise bike. Seems like an all electrical version is less trouble and most efficient.