Quote:
Originally Posted by P-hack
Interesting re: dual motors. To me the simplest is to just one set of igbts and one controller in slip mode and two motors in parallel. Read both motor speed signals and take the max speed for determining slip (prevents wheelspin runaway and encourages the slower one to speed up). Set 0% throttle to not regen and coast around the corners when you can. The latter fits well with "good" driving, traction pie habits anyway, you *shouldn't* be braking or accelerating much while turning and saving your traction for changing direction.
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Thats the system the trains use. It does a very good job at controlling traction. It would suit a FWD vehicle, but not a RWD, as the slowest wheel would never be able to go much slower than the fastest wheel (on my setup the maximum slip is 140RPM and can go all the way down to zero) which would limit the curving angle. The other issue is that one could potentially have 100% torque delivered to one wheel while the other was in the air. Not a problem with trains, but not ideal for a car.
Accelerating on a FWD vehicle during a curve actually encourages road grip as the front wheels push the car in the same direction as the steering. Not the same for braking tough.