Re: More drag racing questions (torque)

[Paul G <neong@gte.net>]

>If you are telling me that dynamometer hooked to the stalled motor shaft
>shows identical ft*lb torque value whether I apply 0.01V to it or 10V
>(unlimited current power supply), sorry, you are wrong.

No, I'm telling you that the DC motor controller is JUST AS MUCH a part of
a modern EV DC drive as any of the inverters are for the motors you sell.
At stall the motor will be at 400 amps (in my case), limited by the
controller. You will read the same 64ft/lbs of torque (max torque) that you
will read at full throttle at *any* rpm from 0 up to 3500rpm (thats when my
Prestolite comes out of current limit on 120v worth of Optimas and a Cutis
1221b). If I raise the voltage then my torque is constant to a higher rpm.
Its *just* like your AC drive in this respect.

I could raise amp limit of my controller and watch torque rise, all the way
until the motor blows chuncks on the launchpad. You could too, but we both
would need a different controller/inverter.

Note this quote from my post:
> Yes, its full torque, as in all the torque the motor will ever make at the
> **controllers current limit**. For a Prestolite MTC-4001 that would be 64
> ft/lbs at 400 amps.

Neon