Four-Level Direct Torque Control of Permanent Magnet Synchronous Motor Based on Neural Networks with Regulation Speed using Neural PI Controller

In this article, the author proposes a sensorless direct torque control (DTC) of permanent magnet synchronous motor (PMSM) fed by four-level neutral point diode clamped (NPC) inverter using a neural networks (NNs) technique. neural PI (PIN) regulator is used for controlling the rotor speed of PMSM and NN controller applied in switching select stator voltage. The technique proposed in this article can minimize the stator flux ripple, electromagnetic torque ripple and harmonic distortion of stator current, and especially improve system good dynamic performance and robustness in high and low speeds.