FEMT 2023.1: Torque Computation Mode
From version 2023.1, there are 2 different modes for computing the torque:
- Electromagnetic to compute the electromagnetic torque
- Useful to compute the useful torque, which
corresponds to the electromagnetic torque reduced by the torque loss due to
the iron losses:
Torque_useful = Torque_electromagnetic - (Iron_losses)/ω
where ω is the rotation pulsation in rad/s
| Electromagnetic mode | Useful mode |
|---|---|
 |
 |
The torque computation mode is available:
- before solving: in the Input parameters
- after solving: in Post-process with a New Command
Restriction:
- For the torque computation, the Useful mode is only available with the MTPA and MTPV command modes (for which the iron losses are computed).
- With the MTPA Fast and MTPV Fast command modes, the iron losses are not computed, so the Useful mode is not available, the torque will therefore be computed with the Electromagnetic mode.
Note:
- From version 2023.1, with the MTPA and MTPV command modes, the default torque computation mode is the Useful mode.
- For all the tests run prior to version 2023.1, with all the command
modes: MTPA, MTPV,
MTPA Fast and MTPV
Fast, the torque was computed with the
Electromagnetic mode (this was the one and
only torque computation mode).
However, for the tests run with a version prior to 2023.1, with the MTPA and MTPV command modes, it is possible to rerun the torque computation with the Useful mode by using the button or the contextual menu Post-process with a New Command from version 2023.1.