Implementation of Novel Generalized SVM Algorithm in DTFC for Multilevel Inverter‐Fed PMSM Drives With Reduced Computational Complexity

Space vector pulse‐width modulation (SVM) underpins direct torque and flux control (DTFC) of multilevel inverter (MLI)‐fed permanent magnet synchronous motor (PMSM) drives across industrial, traction, marine, and heavy‐duty applications. However, existing MLI‐SVM schemes are often tied to specific inverter levels or topologies and rely on recursive vector selection, imposing a high computational burden, limiting sampling rates, and increasing torque ripple and reduced drive performance. This paper proposes a generalized SVM algorithm that reduces computation time and seamlessly supports any inverter level or topology to improve real‐time drive performance. The method replaces recursive searches with a direct nearest‐vector formula and generates all switching states, including redundant vectors. Duty ratios are computed via standard two‐level inverter dwell‐time equations regardless of operating level. The proposed algorithm was successfully tested on DTFC‐fed PMSM drives with two distinct inverter types: 3‐ and 5‐Level NPC and 3‐, 5‐, and 7‐Level CHB. Experimental validation shows up to 67% reduction in computation time and 64% reduction in torque ripple compared with conventional and recent methods.