An enhanced feedforward flux weakening control for high?speed permanent magnet machine drive applications

Permanent magnet machines have been used in the high-speed drive applications due to their high-efficiency, high-power-density, and wide-speed range characteristics. However, control of such permanent machine is always challenging proper flux-weakening controller design essential achieve high performance these machines. In this paper, an improved feedforward scheme for interior synchronous (IPMSM) drives are proposed. The proposed method identifies optimal d-axis q-axis currents under different operation regions using maximum-torque-per-ampere curve, voltage limit, current limit curves with a fast Newton–Raphson algorithm. To ensure mechanism, effects inductance variations magnetic saturation considered innovative high-frequency staircase injection identify inductance. experimental results show that compared other existing methods, technique can improve DC-link utilisation without need tune any gains fully utilise maximum available torque desirable transient performance.