Hello Guys,
I am using MotorWare for a university project. We have an experimental electrical car, and want to use InstaSPIN for control.
We have adapted the HAL to our custom platform, and for safety reasons we switched from sensorless control to using Hall sensors which are installed in the motor. (I found a forum post with some unofficial observer module, this works fine!) The sensorless estimated speed is used for redundancy and error checking.
The DC Bus comes from a battery, and varies from 3xx to 400 Volts. But, our motor reaches his mechanical speed limitation at about 240 Volts RMS phase voltage, so I want to limit the currents controller's output voltages to around 340 V peak.
In the user.h I found the parameter USER_MAX_VS_MAG_PU, which I could reduce - but to which value does the PU refer in this case? Or I think there are some min/max limits in the controller initialization. Which is the right parameter for me to change? And how do I calculate the PU values, to limit the output voltage to a certain value in Volts?
Basically, I want to do a complete torque control, only with an upper speed limit. This speed limit does not have to be exact, just somewhere around 8000 rpm (mechanical max speed is 10000rpm, so there is enough safety margin).
What would you recommend me to do?
Thank you very much,
Philipp