A Novel Commissioning Procedure for High Accuracy Torque Estimation in PMSM Drives

Several emerging applications require fast and precise torque control. Torque measurements are still expensive, bulky and delicate. On the other hand, estimation techniques are all valid in principle, but their accuracy is largely affected by model identification and commissioning. This paper adopts a simple and effective torque observer based on voltage and current measurements. It includes all motor losses, to get an enhanced overall accuracy, along with an extremely fast response. The key-feature is the commissioning procedure, based on a set of off-line measurements. The procedure details, as well as the successful experimental results on a real prototype, are reported in the paper.