An MPF method-based Torsional Vibration Analysis of RBHCC-driven PMSM Coupled System in comparison with SPWM Technique for EVs and HEVs Transmission

EVs and HEVs with complex power transmission mechanisms from the source (PMSM) to the load (live wheels) include coupled shafts of varied functionalities along with step-up and step-down gears, pulleys, couplers, and other intermediate elements based upon torque to speed gain requirement at the load. Due to the power electronics converter circuit, and stator winding, the driving techniques for Permanent Magnet Synchronous Motor (PMSM) have unavoidable torque ripples, and these fluctuations lead to mechanical anomalies like vibration, which become havoc at resonance. In the present study, a novel Random Band Hysteresis Current Control (RBHCC) is illustrated and its torsional vibrational signatures using an advanced Modal Participation Factor (MPF) based optimized lumped model technique is presented and also compared with the standard SPWM technique. The analytical and experimental results show a reduction in total vibration by 34% with an 18.75% reduction in mechanical vibration and a 39% reduction in Acoustic Noise in the proposed RBHCC technique compared to the SPWM technique, which has a positive mark on system reliability and power transmission efficiency. Analytical and experimental studies were performed on 1.07- kW, 4-poles, 36-slots, and 3-phase PMSM drive coupled with a 2.5 kW load DC generator.