Self-tuning of MTPA current vector generation scheme in IPM synchronous motor drives

High performance PMSM drives require accurate selection of the current vector reference to be inputted to a suitable current control algorithm. This work implements a drive prototype with a current vector generation scheme which can be self-adjusted in "quasi real-time" to the actual maximum torque per amps locus. The model doesn't have to rely on computed or estimated motor parameters, but only on the analysis of additional signals superimposed on the driving voltages/currents, without affecting the overall drive performance.