Time-Optimal Current Control of Synchronous Motor Drives

We are concerned with the problem of fast and accurate tracking currents in general synchronous drive. The becomes complicated decreasing available voltage, which is common high-speed field weakening regimes. existing time-optimal controllers rely on a simplified model, ignoring stator resistance differences inductances. derive solution for model considering all parameters show how affect current trajectory. One simplifying assumption had to be made, but we simulation that it has negligible impact accuracy. simplification allowed design feed-forward controller low computational cost can easily implemented realtime. provide experimental validation developed IPMSM drive prototype rated power 4.5 kW using conventional industrial DSP. compared PI deadbeat solutions, demonstrating reach required setpoint four times faster than competitors at regime proposed control seen as universal building block combined feedback observers thus incorporated into solutions.