...
Ploss = Req*Io2 + (α*Io+β)*Vbus + Cfeq*V2bus
| Description | Value |
|---|
| Vbus | Bus (Battery) Voltage of the controller |
972V 81V 1134V| 2V) |
| Io | Ouput current of the controller | Pmax/ |
Vbus| Vbus (Roughly, This will actually be off by ~1.2x) |
| Req | Equivalent resistance of the entire controller | 0.0108 Ohms |
| β | Constant component of the switching loss (per unit of bus voltage) | 0.018153 |
| α | Linear component of the switching loss (per unit of bus voltage) | 0.003345 |
| Cfeq | Equivalent capacitance*frequency of the controller | 0.00015625 |
Using an approximated value of Pmax for the entire car as 9kW, including mechanical and non-controller electrical losses, the per motor controller peak power is 4.5kW. Meaning the approximated output current will vary between 39between 29.7A 8A - 55.6A 45A (Nominal 4634.3A7A)
From this we can plot the efficiency of the motor controllers versus the voltage and the current using Desmos.
...