• Permanent Magnet Synchronous Motor Variable Frequency Drive System

      Kosbar, Kurt; Schad, Judah; Nichols, Cameron; Brinker, Katelyn; Missouri University of Science and Technology (International Foundation for Telemetering, 2017-10)
      This paper discusses a permanent magnet synchronous motor (PMSM) variable frequency drive (VFD) system developed for an all-terrain Wifi-HaLow connected (802.11ah, 900 MHz) modular electric vehicle that competed in the Mars University Rover Challenge (URC). The quadrature axis flux linkage for each motor was estimated using on-board voltage and current measurements. A synchronous control algorithm tracked the electromagnetic operating parameters, which are highly dependent on variations in motor construction and load conditions. A feed-forward model-driven observer solution calculated flux linkage angles by direct-quadrature-zero transformation of three-phase shunt currents using DSP processors.