The HPEVS motors/Curtis controllers can be set up this way. The Curtis software is very flexible in this regard. There are two inputs: Neutral_Braking under the Torque Mode menu, which works off the accelerator pedal, and Brake Menu for a separate Brake input to the controller. The Regen Limiting Map under the Current Limits Map menu can be used to limit how much regen you get at different motor rpm - to avoid very high regen if you remove your foot from the accelerator at high rpm for example. There is a similar Brake Map. I use only Neutral_Braking but HPEVS generally uses both, setting up fairly strong regen off the accelerator pedal, and then applying more with the Brake function through the vehicle's brake pedal. It is easy to tailor them as you want using the hand held programmer or the Curtis PC software.
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