Modeling and Analysis of Counteracted Parallel High Frequency Voltage Injection Method for Non-Phase-Shifted DTP PMSM with Torque Ripple Optimization

This paper proposes a counteracted parallel high frequency voltage injection (CP-HFVI) method with injection-frequency torque ripple elimination for a non-phase-shifted dual three phase IPMSM (NPS-DTP IPMSM). First, inductance matrix is analyzed on winding configurations. Second, the high frequency signal model is constructed and the high frequency torque model is established. Then, the CP-HFVI method is proposed by injecting parallel but phase shifted high frequency signal into both winding sets. Moreover, analysis on the influence of winding configurations on CP-HFVI is conducted, revealing the position observation condition is determined by the asymmetric difference of d-q inductance between self and mutual inductance. Finally, the performance of the CP-HFVI method is verified by simulation, where the performance of CP-HFVI method on torque ripple reduction is demonstrated.