Discussion about cogging

[professor_shartsis]

@professor_shartsis

with unpowered cogging you store energy (like a spring) then get most or all of it back:

Hummie hubs Kickstarter

i’m not entirely convinced the cogging results in any net rolling resistance with enough inertia… and I thought FOC is supposed to take care of the torque ripple.

^when I release the wheel it spins some from stored energy

when you lose kinetic energy with cogging, you store potential energy and then you get kinetic energy again when you move the motor past the potential energy peak. momentum and energy are conserved.