Lab: tuning regeneration for maximum recovery
Put the theory to work — balance lift-off torque against axle grip and battery limits.
- Explain lab: tuning regeneration for maximum recovery at engineering level
- Read the numbers that define the behaviour
- Apply the idea to a real braking system
Overview
This lab lets you set the aggressiveness of one-pedal regen and see how state of charge, temperature and road grip constrain how much energy actually comes back.
In depth
Lab · Tune Regeneration
Adjust lift-off torque and operating conditions to recover at least 65% of braking energy without exceeding the axle's friction limit.
Regenerative torque is applied at the driven axle only. Ask for too much on a low-friction surface and that axle locks or the stability system intervenes, so the controller blends in the friction brakes. Recovery is also capped by the pack: a full or cold battery cannot absorb current.
Reading the result
If recovery stalls well below the target even with the torque slider at maximum, look first at state of charge and pack temperature — those are the constraints that no torque setting can overcome. If the axle friction bar is pegged, the road surface, not the electronics, is the limiting factor.
Production regen calibration tables are generated exactly this way — sweeping torque against SOC, temperature and grip and choosing the setting that maximises recovery while respecting every limit.
Key takeaways
- Recovery is jointly limited by lift-off torque, battery state and available grip.
- The dominant limiting factor changes with conditions — sometimes it's the battery, sometimes the road.
- Calibration is a multidimensional trade-off, not a single dial.
Confirm you've read through and we'll count it toward your progress.