Originally Posted by Bowser330
Thanks for the detailed answer.
How much do you expect the 199V to push the peak power rpm out too?
I am not sure that I will find out with my current pack. 199V and 2000amps is 400kW or about 536eHP each motor. See below. You can extrapolate the charts below. perhaps 2500rpm???? I would be well into the nines there and my car will need a major overhaul, roll cage, certification, parachute, competition license, etc....
Another point, I have been finding that the higher my voltage MV setpoint, the quicker I go up in rpm. For example. I can just get to 199V by the end of the track and the car is still accelerating like mad. See data below.
This has the seat of the pants feeling of actually moving the peak power point up rather than to the right. As I went from 170V to 180 and 190 I found the shift point around the same rpm. I just get there quicker. It may have something to do how the zilla approaches peak voltage.
Some cars, reach their peak voltage and peak rpm about the same time.
Some cars reach peak power at a point well below peak voltage. For example, here is Waylunds latest curve from mid '10, showing he doesn't reach peak power at peak voltage. Raising his peak voltage wouldn't help with his peak power point.
You can see his peak power is limited by battery sag around 3300rpm. My pack is now suffering at this point as well. My power curve would like to continue up and to the right but I truncate this by controlling the LBV setpoint in the hairball.
I project that if I let the pack sag a bit more or I add some more batteries (26Ahr now) I would push the peak power point up rather than to the right. If it does go right maybe 100rpm? Near the the same 3200rpm as Waylunds Impulse9s. Except we will be making around 850 battery HP at that point.
I would like to re-clarify the dyno sheet projection was using real data, was the input to the motor not the output and theoretical knee point with unlimited pack and controller. I am there with one motor, one zilla and my pack. When I use two motors and the overdrive, my pack is starting to show its limits, and I am below the knee point near 2800rpm. I was trying to create something that was truly only the motor limits. For real life, the peak rpm knee on the Warp9 motor dyno sheet may be closer to 2800rpm.