Ah, the undervoltage is something I didn't consider. How good is the current-mode controller? Presumably it's cycle-by-cycle at the PWM rate...? I hope to run current control mode, so with any luck the motors won't draw more than 40A each even in stall.
I'll test the current-regulation quality tomorrow and report back. I have a couple of approaches to try, any input would be appreciated:
- Programmable load (mine's rated to 50A, 500V, 600W) in constant-voltage mode in series with an appropriately-sized inductor to simulate a spinning motor at various speeds.
- Run a motor and lock its shaft. This loses the ability to try and various "speeds" but will more accurately simulate the inductance of the motor.
- Run two motors back to back, where one is controlled by me with a knob on a power supply (the one I plan to use is 0-80V, 1200W, linear post-regulator) and the other controlled by the Jaguar. My voltage knob is basically a speed setting. It's current setting is basically torque.
The third option is probably the most realistic and versatile, but also the most setup. I'm not well-equipped (mechanically) to do that at least for another week.